NetCDF  4.7.3
RELEASE_NOTES.md
1 Release Notes {#RELEASE_NOTES}
2 =============
3 
4 \brief Release notes file for the netcdf-c package.
5 
6 This file contains a high-level description of this package's evolution. Releases are in reverse chronological order (most recent first). Note that, as of netcdf 4.2, the `netcdf-c++` and `netcdf-fortran` libraries have been separated into their own libraries.
7 
8 ## 4.7.3 - November 20, 2019
9 
10 * [Bug Fix]Fixed an issue where installs from tarballs will not properly compile in parallel environments.
11 * [Bug Fix] Library was modified so that rewriting the same attribute happens without deleting the attribute, to avoid a limit on how many times this may be done in HDF5. This fix was thought to be in 4.6.2 but was not. See [https://github.com/Unidata/netcdf-c/issues/350].
12 * [Enhancement] Add a dispatch version number to netcdf_meta.h and libnetcdf.settings, in case we decide to change dispatch table in future. See [https://github.com/Unidata/netcdf-c/issues/1469].
13 * [Bug Fix] Now testing that endianness can only be set on atomic ints and floats. See [https://github.com/Unidata/netcdf-c/issues/1479].
14 * [Bug Fix] Fix for subtle error involving var and unlimited dim of the same name, but unrelated, in netCDF-4. See [https://github.com/Unidata/netcdf-c/issues/1496].
15 * [Enhancement] Update for attribute documentation. See [https://github.com/Unidata/netcdf-c/issues/1512].
16 * [Bug Fix][Enhancement] Corrected assignment of anonymous (a.k.a. phony) dimensions in an HDF5 file. Now when a dataset uses multiple dimensions of the same size, netcdf assumes they are different dimensions. See [GitHub #1484](https://github.com/Unidata/netcdf-c/issues/1484) for more information.
17 
18 ## 4.7.2 - October 22, 2019
19 
20 * [Bug Fix][Enhancement] Various bug fixes and enhancements.
21 * [Bug Fix][Enhancement] Corrected an issue where protected memory was being written to with some pointer slight-of-hand. This has been in the code for a while, but appears to be caught by the compiler on OSX, under circumstances yet to be completely nailed down. See [GitHub #1486](https://github.com/Unidata/netcdf-c/issues/1486) for more information.
22 * [Enhancement] [Parallel IO] Added support for parallel functions in MSVC. See [Github #1492](https://github.com/Unidata/netcdf-c/pull/1492) for more information.
23 * [Enhancement] Added a function for changing the ncid of an open file. This function should only be used if you know what you are doing, and is meant to be used primarily with PIO integration. See [GitHub #1483](https://github.com/Unidata/netcdf-c/pull/1483) and [GitHub #1487](https://github.com/Unidata/netcdf-c/pull/1487) for more information.
24 
25 ## 4.7.1 - August 27, 2019
26 
27 * [Enhancement] Added unit_test directory, which contains unit tests for the libdispatch and libsrc4 code (and any other directories that want to put unit tests there). Use --disable-unit-tests to run without unit tests (ex. for code coverage analysis). See [GitHub #1458](https://github.com/Unidata/netcdf-c/issues/1458).
28 
29 * [Bug Fix] Remove obsolete _CRAYMPP and LOCKNUMREC macros from code. Also brought documentation up to date in man page. These macros were used in ancient times, before modern parallel I/O systems were developed. Programmers interested in parallel I/O should see nc_open_par() and nc_create_par(). See [GitHub #1459](https://github.com/Unidata/netcdf-c/issues/1459).
30 
31 * [Enhancement] Remove obsolete and deprecated functions nc_set_base_pe() and nc_inq_base_pe() from the dispatch table. (Both functions are still supported in the library, this is an internal change only.) See [GitHub #1468](https://github.com/Unidata/netcdf-c/issues/1468).
32 
33 * [Bug Fix] Reverted nccopy behavior so that if no -c parameters are given, then any default chunking is left to the netcdf-c library to decide. See [GitHub #1436](https://github.com/Unidata/netcdf-c/issues/1436).
34 
35 ## 4.7.0 - April 29, 2019
36 
37 * [Enhancement] Updated behavior of `pkgconfig` and `nc-config` to allow the use of the `--static` flags, e.g. `nc-config --libs --static`, which will show information for linking against `libnetcdf` statically. See [Github #1360](https://github.com/Unidata/netcdf-c/issues/1360) and [Github #1257](https://github.com/Unidata/netcdf-c/issues/1257) for more information.
38 
39 * [Enhancement] Provide byte-range reading of remote datasets. This allows
40 read-only access to, for example, Amazon S3 objects and also Thredds Server
41 datasets via the HTTPService access method.
42 See [GitHub #1251](https://github.com/Unidata/netcdf-c/issues/1251).
43 
44 * Update the license from the home-brewed NetCDF license to the standard 3-Clause BSD License. This change does not result in any new restrictions; it is merely the adoption of a standard, well-known and well-understood license in place of the historic NetCDF license written at Unidata. This is part of a broader push by Unidata to adopt modern, standardized licensing.
45 
46 ## 4.6.3 - February 28, 2019
47 
48 * [Bug Fix] Correctly generated `netcdf.pc` generated either by `configure` or `cmake`. If linking against a static netcdf, you would need to pass the `--static` argument to `pkg-config` in order to list all of the downstream dependencies. See [Github #1324](https://github.com/Unidata/netcdf-c/issues/1324) for more information.
49 * Now always write hidden coordinates attribute, which allows faster file opens when present. See [Github #1262](https://github.com/Unidata/netcdf-c/issues/1262) for more information.
50 * Some fixes for rename, including fix for renumbering of varids after a rename (#1307), renaming var to dim without coordinate var. See [Github #1297](https://github.com/Unidata/netcdf-c/issues/1297).
51 * Fix of NULL parameter causing segfaults in put_vars functions. See [Github #1265](https://github.com/Unidata/netcdf-c/issues/1265) for more information.
52 * Fix of --enable-benchmark benchmark tests [Github #1211](https://github.com/Unidata/netcdf-c/issues/1211)
53 * Update the license from the home-brewed NetCDF license to the standard 3-Clause BSD License. This change does not result in any new restrictions; it is merely the adoption of a standard, well-known and well-understood license in place of the historic NetCDF license written at Unidata. This is part of a broader push by Unidata to adopt modern, standardized licensing.
54 * [BugFix] Corrected DAP-releated issues on big-endian machines. See [Github #1321](https://github.com/Unidata/netcdf-c/issues/1321), [Github #1302](https://github.com/Unidata/netcdf-c/issues/1302) for more information.
55 * [BugFix][Enhancement] Various and sundry bugfixes and performance enhancements, thanks to \@edhartnett, \@gsjaardema, \@t-b, \@wkliao, and all of our other contributors.
56 * [Enhancement] Extended `nccopy -F` syntax to support multiple variables with a single invocation. See [Github #1311](https://github.com/Unidata/netcdf-c/issues/1311) for more information.
57 * [BugFix] Corrected an issue where DAP2 was incorrectly converting signed bytes, resulting in an erroneous error message under some circumstances. See [GitHub #1317](https://github.com/Unidata/netcdf-c/issues/1317) for more information. See [Github #1319](https://github.com/Unidata/netcdf-c/issues/1319) for related information.
58 * [BugFix][Enhancement] Modified `nccopy` so that `_NCProperties` is not copied over verbatim but is instead generated based on the version of `libnetcdf` used when copying the file. Additionally, `_NCProperties` are displayed if/when associated with a netcdf3 file, now. See [GitHub #803](https://github.com/Unidata/netcdf-c/issues/803) for more information.
59 
60 ## 4.6.2 - November 16, 2018
61 
62 * [Enhancement] Lazy att read - only read atts when user requests one of them. See [GitHub #857](https://github.com/Unidata/netcdf-c/issues/857).
63 * [Enhancement] Fast global att read - when global atts are read, they are read much more quickly. See [GitHub #857](https://github.com/Unidata/netcdf-c/issues/857).
64 
65 ## 4.6.2-rc2 November 1, 2018
66 
67 
68 * [Enhancement] Add nccopy command options for per-variable chunk sizing, and minimum chunk size. See [GitHub #1087](https://github.com/Unidata/netcdf-c/pull/1087).
69 * [Bug Fix] Fix nccopy handling of user specified chunk sizes. See [GitHub #725](https://github.com/Unidata/netcdf-c/issues/725),[#1087](https://github.com/Unidata/netcdf-c/issues/1087).
70 * [Bug Fix] Avoid limit on number of times a netCDF4 attribute can be updated. Not a complete fix for the HDF5 "maximum creation order" problem, but should greatly reduce occurrences in many real-world cases. See [GitHub #350](https://github.com/Unidata/netcdf-c/issues/350).
71 * [Bug Fix] The use of NC_DISKLESS has been modified to make it cleaner. This adds a new flag called NC_PERSIST that takes over the now obsolete NC_MPIPOSIX.
72 * [Obsolete] Obsolete the MPIPOSIX flag.
73 * [Bug Fix] When using filters with HDF5 1.10.x or later, it is necessary to utilize the HDF5 replacements for malloc, realloc, and free in the filter code.
74 
75 ## 4.6.2-rc1 - September 19, 2018
76 
77 * [Enhancement] Create a new version of _NCProperties provenance attribute. This version (version 2) supports arbitrary key-value pairs. It is the default when new files are created. Version 1 continues to be accepted.
78 * [Enhancement] Allow user to set http read buffersize for DAP2 and DAP4 using the tag HTTP.READ.BUFFERSIZE in the .daprc file.
79 * [Enhancement] Allow user to set http keepalive for DAP2 and DAP4 using the tag HTTP.KEEPALIVE in the .daprc file (see the OPeNDAP documentation for details).
80 * [Enhancement] Support DAP4 remote tests using a new remote test server locatedon the Unidata JetStream project.
81 * [Enhancement] Improved the performance of the nc_get/put_vars operations by using the equivalent slab capabilities of hdf5. Result is a significant speedup of these operations. See [GitHub #1001](https://github.com/Unidata/netcdf-c/pull/1001) for more information.
82 * [Enhancement] Expanded the capabilities of `NC_INMEMORY` to support writing and accessing the final modified memory. See [GitHub #879](https://github.com/Unidata/netcdf-c/pull/879) for more information.
83 * [Enhancement] Made CDF5 support enabled by default. See [Github #931](https://github.com/Unidata/netcdf-c/issues/931) for more information.
84 * [Bug Fix] Corrected a number of memory issues identified in `ncgen`. See [GitHub #558 for more information](https://github.com/Unidata/netcdf-c/pull/558).
85 
86 ## 4.6.1 - March 19, 2018
87 
88 * [Bug Fix] Corrected an issue which could result in a dap4 failure. See [Github #888](https://github.com/Unidata/netcdf-c/pull/888) for more information.
89 * [Bug Fix][Enhancement] Allow `nccopy` to control output filter suppresion. See [Github #894](https://github.com/Unidata/netcdf-c/pull/894) for more information.
90 * [Enhancement] Reverted some new behaviors that, while in line with the netCDF specification, broke existing workflows. See [Github #843](https://github.com/Unidata/netcdf-c/issues/843) for more information.
91 * [Bug Fix] Improved support for CRT builds with Visual Studio, improves zlib detection in hdf5 library. See [Github #853](https://github.com/Unidata/netcdf-c/pull/853) for more information.
92 * [Enhancement][Internal] Moved HDF4 into a distinct dispatch layer. See [Github #849](https://github.com/Unidata/netcdf-c/pull/849) for more information.
93 
94 ## 4.6.0 - January 24, 2018
95 * [Enhancement] Full support for using HDF5 dynamic filters, both for reading and writing. See the file docs/filters.md.
96 * [Enhancement] Added an option to enable strict null-byte padding for headers; this padding was specified in the spec but was not enforced. Enabling this option will allow you to check your files, as it will return an E_NULLPAD error. It is possible for these files to have been written by older versions of libnetcdf. There is no effective problem caused by this lack of null padding, so enabling these options is informational only. The options for `configure` and `cmake` are `--enable-strict-null-byte-header-padding` and `-DENABLE_STRICT_NULL_BYTE_HEADER_PADDING`, respectively. See [Github #657](https://github.com/Unidata/netcdf-c/issues/657) for more information.
97 * [Enhancement] Reverted behavior/handling of out-of-range attribute values to pre-4.5.0 default. See [Github #512](https://github.com/Unidata/netcdf-c/issues/512) for more information.
98 * [Bug] Fixed error in tst_parallel2.c. See [Github #545](https://github.com/Unidata/netcdf-c/issues/545) for more information.
99 * [Bug] Fixed handling of corrupt files + proper offset handling for hdf5 files. See [Github #552](https://github.com/Unidata/netcdf-c/issues/552) for more information.
100 * [Bug] Corrected a memory overflow in `tst_h_dimscales`, see [Github #511](https://github.com/Unidata/netcdf-c/issues/511), [Github #505](https://github.com/Unidata/netcdf-c/issues/505), [Github #363](https://github.com/Unidata/netcdf-c/issues/363) and [Github #244](https://github.com/Unidata/netcdf-c/issues/244) for more information.
101 
102 ## 4.5.0 - October 20, 2017
103 
104 * Corrected an issue which could potential result in a hang while using parallel file I/O. See [Github #449](https://github.com/Unidata/netcdf-c/pull/449) for more information.
105 * Addressed an issue with `ncdump` not properly handling dates on a 366 day calendar. See [GitHub #359](https://github.com/Unidata/netcdf-c/issues/359) for more information.
106 
107 ### 4.5.0-rc3 - September 29, 2017
108 
109 * [Update] Due to ongoing issues, native CDF5 support has been disabled by **default**. You can use the options mentioned below (`--enable-cdf5` or `-DENABLE_CDF5=TRUE` for `configure` or `cmake`, respectively). Just be aware that for the time being, Reading/Writing CDF5 files on 32-bit platforms may result in unexpected behavior when using extremely large variables. For 32-bit platforms it is best to continue using `NC_FORMAT_64BIT_OFFSET`.
110 * [Bug] Corrected an issue where older versions of curl might fail. See [GitHub #487](https://github.com/Unidata/netcdf-c/issues/487) for more information.
111 * [Enhancement] Added options to enable/disable `CDF5` support at configure time for autotools and cmake-based builds. The options are `--enable/disable-cdf5` and `ENABLE_CDF5`, respectively. See [Github #484](https://github.com/Unidata/netcdf-c/issues/484) for more information.
112 * [Bug Fix] Corrected an issue when subsetting a netcdf3 file via `nccopy -v/-V`. See [Github #425](https://github.com/Unidata/netcdf-c/issues/425) and [Github #463](https://github.com/Unidata/netcdf-c/issues/463) for more information.
113 * [Bug Fix] Corrected `--has-dap` and `--has-dap4` output for cmake-based builds. See [GitHub #473](https://github.com/Unidata/netcdf-c/pull/473) for more information.
114 * [Bug Fix] Corrected an issue where `NC_64BIT_DATA` files were being read incorrectly by ncdump, despite the data having been written correctly. See [GitHub #457](https://github.com/Unidata/netcdf-c/issues/457) for more information.
115 * [Bug Fix] Corrected a potential stack buffer overflow. See [GitHub #450](https://github.com/Unidata/netcdf-c/pull/450) for more information.
116 
117 ### 4.5.0-rc2 - August 7, 2017
118 
119 * [Bug Fix] Addressed an issue with how cmake was implementing large file support on 32-bit systems. See [GitHub #385](https://github.com/Unidata/netcdf-c/issues/385) for more information.
120 * [Bug Fix] Addressed an issue where ncgen would not respect keyword case. See [GitHub #310](https://github.com/Unidata/netcdf-c/issues/310) for more information.
121 
122 ### 4.5.0-rc1 - June 5, 2017
123 
124 * [Enhancement] DAP4 is now included. Since dap2 is the default for urls, dap4 must be specified by
125 (1) using "dap4:" as the url protocol, or
126 (2) appending "#protocol=dap4" to the end of the url, or
127 (3) appending "#dap4" to the end of the url
128 Note that dap4 is enabled by default but remote-testing is
129 disabled until the testserver situation is resolved.
130 * [Enhancement] The remote testing server can now be specified with the `--with-testserver` option to ./configure.
131 * [Enhancement] Modified netCDF4 to use ASCII for NC_CHAR. See [Github Pull request #316](https://github.com/Unidata/netcdf-c/pull/316) for more information.
132 * [Bug Fix] Corrected an error with how dimsizes might be read. See [Github #410](https://github.com/unidata/netcdf-c/issues/410) for more information.
133 * [Bug Fix] Corrected an issue where 'make check' would fail if 'make' or 'make all' had not run first. See [Github #339](https://github.com/Unidata/netcdf-c/issues/339) for more information.
134 * [Bug Fix] Corrected an issue on Windows with Large file tests. See [Github #385](https://github.com/Unidata/netcdf-c/issues/385]) for more information.
135 * [Bug Fix] Corrected an issue with diskless file access, see [Pull Request #400](https://github.com/Unidata/netcdf-c/issues/400) and [Pull Request #403](https://github.com/Unidata/netcdf-c/issues/403) for more information.
136 * [Upgrade] The bash based test scripts have been upgraded to use a common test_common.sh include file that isolates build specific information.
137 * [Upgrade] The bash based test scripts have been upgraded to use a common test_common.sh include file that isolates build specific information.
138 * [Refactor] the oc2 library is no longer independent of the main netcdf-c library. For example, it now uses ncuri, nclist, and ncbytes instead of its homegrown equivalents.
139 * [Bug Fix] `NC_EGLOBAL` is now properly returned when attempting to set a global `_FillValue` attribute. See [GitHub #388](https://github.com/Unidata/netcdf-c/issues/388) and [GitHub #389](https://github.com/Unidata/netcdf-c/issues/389) for more information.
140 * [Bug Fix] Corrected an issue where data loss would occur when `_FillValue` was mistakenly allowed to be redefined. See [Github #390](https://github.com/Unidata/netcdf-c/issues/390), [GitHub #387](https://github.com/Unidata/netcdf-c/pull/387) for more information.
141 * [Upgrade][Bug] Corrected an issue regarding how "orphaned" DAS attributes were handled. See [GitHub #376](https://github.com/Unidata/netcdf-c/pull/376) for more information.
142 * [Upgrade] Update utf8proc.[ch] to use the version now maintained by the Julia Language project (https://github.com/JuliaLang/utf8proc/blob/master/LICENSE.md).
143 * [Bug] Addressed conversion problem with Windows sscanf. This primarily affected some OPeNDAP URLs on Windows. See [GitHub #365](https://github.com/Unidata/netcdf-c/issues/365) and [GitHub #366](https://github.com/Unidata/netcdf-c/issues/366) for more information.
144 * [Enhancement] Added support for HDF5 collective metadata operations when available. Patch submitted by Greg Sjaardema, see [Pull request #335](https://github.com/Unidata/netcdf-c/pull/335) for more information.
145 * [Bug] Addressed a potential type punning issue. See [GitHub #351](https://github.com/Unidata/netcdf-c/issues/351) for more information.
146 * [Bug] Addressed an issue where netCDF wouldn't build on Windows systems using MSVC 2012. See [GitHub #304](https://github.com/Unidata/netcdf-c/issues/304) for more information.
147 * [Bug] Fixed an issue related to potential type punning, see [GitHub #344](https://github.com/Unidata/netcdf-c/issues/344) for more information.
148 * [Enhancement] Incorporated an enhancement provided by Greg Sjaardema, which may improve read/write times for some complex files. Basically, linked lists were replaced in some locations where it was safe to use an array/table. See [Pull request #328](https://github.com/Unidata/netcdf-c/pull/328) for more information.
149 
150 ## 4.4.1.1 - November 21, 2016
151 
152 * [Bug] Fixed an issue where `ncgen` would potentially crash or write incorrect netCDF4 binary data under very specific circumstances. This bug did *not* affect data written on 32-bit systems or by using the netCDF library; it was specific to `ncgen`. This would only happen when writing a compound data type containing an 8-byte data type followed by a 4-byte data type *and* the 4-byte data type was not properly aligned; this would *possibly* result in incorrect padding. This did not affect 32-bit systems, or data written directly by the library. See [GitHub #323](https://github.com/Unidata/netcdf-c/issues/323) for more information.
153 * [Documentation] Updated documentation related to netCDF variable names and DAP2 access to reflect the undefined behavior potentially observed when DAP2 reserved keywords are used as netCDF variable names. See [GitHub #308](https://github.com/Unidata/netcdf-c/issues/308) for more information.
154 * [Bug] Fixed an issue with `nc_inq_type()` not returning proper value in some circumstances. See [GitHub #317](https://github.com/Unidata/netcdf-c/issues/317) for more information.
155 * [Bug] Corrected an issue related to test failures when `--disable-utilities` or `-DENABLE_UTILITIES=OFF` are specified when building with autotools or cmake, respectively. See [GitHub #313](https://github.com/Unidata/netcdf-c/issues/313) for more information.
156 * [Bug][Enhancement] Corrected a behavioral issue with the `_NCProperties` attribute taking up too much space. See [GitHub #300](https://github.com/Unidata/netcdf-c/issues/300) and [GitHub #301](https://github.com/Unidata/netcdf-c/pull/301) for more information.
157 
158 * [Bug] Corrected behavior for `nc-config` so that, if `nf-config` is found in system, the proper fortran-related information will be conveyed. See [GitHub #296](https://github.com/Unidata/netcdf-c/issues/296] for more information.
159 
160 ## 4.4.1 - June 28, 2016
161 
162 * [File Change] Starting with release 4.4.1, netCDF-4 files created will have superblock version 0 instead of superblock version 2, as was observed in previous netCDF versions. This is due to a workaround required to avoid backwards binary incompatibility when using libhdf5 1.10.x or greater. Superblock versions 0 and 2 appear to be forward and backward compatible. Other than a different superblock number the data should remain consistent.
163 * [Enhancement] Added better error reporting when ncdump/nccopy are given a bad constraint in a DAP url. See [GitHub #279](https://github.com/Unidata/netcdf-c/pull/279) for more information.
164 
165 ### 4.4.1-RC3 - June 17, 2016
166 
167 * [Bug Fix] Misc. bug fixes and improvements.
168 * [Bug Fix] Corrected an issue where adding a \_FillValue attribute to a variable would result in other attributes being lost. See [GitHub #239](https://github.com/Unidata/netcdf-c/issues/239) for more details.
169 * [Bug Fix][Parallel I/O] Corrected an issue reported by Kent Yang at the HDF group related to Collective Parallel I/O and a potential hang.
170 
171 ### 4.4.1-RC2 - May 13, 2016
172 
173 * [Enhancement] Added provenance information to files created. This information consists of a persistent attribute named `_NCProperties` plus two computed attributes, `_IsNetcdf4` and `_SuperblockVersion`. Associated documentation was added to the file `docs/attribute_conventions.md`. See [GitHub pull request #260](https://github.com/Unidata/netcdf-c/pull/260) for more information.
174 * [Bug Fix] Cleaned up some dead links in the doxygen-generated documentation.
175 * [Bug Fix] Corrected several issues related to building under Visual Studio 2014.
176 * [Bug Fix] Corrected several test failures related to HDF5 `1.10.0`
177 * [Bug Fix] Reverted SOVersion *current* to 11 from 12; it was incorrectly incremented in netCDF-C release 4.4.1-RC1.
178 * [Enhancement][Windows] Bumped the included libhdf5 to 1.8.16 from 1.8.15 for pre-built Visual Studio installer files.
179 
180 
181 ### 4.4.1-RC1 - April 15, 2016
182 
183 * [Bug Fix][Enhancement] Fixed an issue with netCDF4 files generated using version `1.10.0` of the HDF5 library. The 1.10 release potentially changed the underlying file format, introducing a backwards compatibility issue with the files generated. HDF5 provided an API for retaining the 1.8.x file format, which is now on by default. See [GitHub Issue #250](https://github.com/Unidata/netcdf-c/issues/250) for more information.
184 * [Bug Fix] Corrected an issue with autotools-based builds performed out-of-source-tree. See [GitHub Issue #242](https://github.com/Unidata/netcdf-c/issues/242) for more information.
185 * [Enhancement] Modified `nc_inq_type()` so that it would work more broadly without requiring a valid ncid. See [GitHub Issue #240](https://github.com/Unidata/netcdf-c/issues/240) for more information.
186 * [Enhancement] Accepted a patch code which added a hashmap lookup for rapid var and dim retrieval in nc3 files, contributed by Greg Sjaardema. See [GitHub Pull Request #238](https://github.com/Unidata/netcdf-c/pull/238) for more information.
187 * [Bug Fix] Accepted a contributed pull request which corrected an issue with how the cmake-generated `nc-config` file determined the location of installed files. See [GitHub Pull Request #235](https://github.com/Unidata/netcdf-c/pull/235) for more information.
188 * [Enhancement] Added an advanced option for CMake-based builds, `ENABLE_SHARED_LIBRARY_VERSION`. This option is `ON` by default, but if turned off, only `libnetcdf.dylib` will be generated, instead of files containing the SOVERSION in the file name. This is a requested feature most people might not care about. See [GitHub #228](https://github.com/Unidata/netcdf-c/issues/228) for more information.
189 * [Bug Fix] Corrected an issue with duplicated error codes defined in multiple header files. See [GitHub #213](https://github.com/Unidata/netcdf-c/issues/213) for more information.
190 * [Bug Fix] Addressed an issue specific to Visual Studio 2015 on Windows. On very large files, some calls to the `fstat` class of functions would fail for no apparent reason. This behavior was **not** observed under Visual Studio 2013. This has now been mitigated. See [GitHub #188](https://github.com/Unidata/netcdf-c/issues/188) for more information.
191 * [Enhancement] Updated `nc-config` to report whether `logging` is enabled in netcdf. Additionally, if `f03` is available in an installed netcdf-fortran library, it will now be reported as well.
192 * [Bug Fix] Addressed an issue where `netcdf_mem.h` was not being installed by cmake. See [GitHub #227](https://github.com/Unidata/netcdf-c/issues/227) for more information.
193 * [Bug Fix] Addressed an issue where `ncdump` would crash when trying to read a netcdf file containing an empty ragged `VLEN` variable in an unlimited dimension. See [GitHub #221](https://github.com/Unidata/netcdf-c/issues/221) for more information.
194 
195 ## 4.4.0 Released - January 13, 2016
196 
197 * Bumped SO version to 11.0.0.
198 
199 * Modified `CMakeLists.txt` to work with the re-organized cmake configuration used by the latest HDF5, `1.8.16`, on Windows. Before this fix, netCDF would fail to locate hdf5 1.8.16 when using cmake on Windows. See [GitHub #186](https://github.com/Unidata/netcdf-c/issues/186) for more information.
200 
201 * Addressed an issue with `ncdump` when annotations were used. The indices for the last row suffered from an off-by-1 error. See [GitHub issue #181](https://github.com/Unidata/netcdf-c/issues/181) for more information.
202 
203 * Addressed an issue on platforms where `char` is `unsigned` by default (such as `ARM`), as well as an issue describing regarding undefined behavior, again on `ARM`. See [GitHub issue #159](https://github.com/Unidata/netcdf-c/issues/159) for detailed information.
204 
205 * Fixed an ambiguity in the grammar for cdl files. See [GitHub #178](https://github.com/Unidata/netcdf-c/issues/178) for more information.
206 
207 * Updated documentation for `nc_get_att_string()` to reflect the fact that it returns allocated memory which must be explicitly free'd using `nc_free_string()`. Reported by Constantine Khroulev, see [GitHub Issue 171](https://github.com/Unidata/netcdf-c/issues/171) for more information.
208 
209 * Modified ncgen to properly handle the L and UL suffixes for integer constants
210  to keep backward compatibility. Now it is the case the single L suffix
211  (e.g. 111L) is treated as a 32 bit integer. This makes it consistent with
212  the fact that NC_LONG (netcdf.h) is an alias for NC_INT. Existing .cdl
213  files should be examined for occurrences of the L prefix to ensure that
214  this change will not affect them.
215  (see Github issue 156[https://github.com/Unidata/netcdf-c/issues/156]).
216 
217 * Updated documentation to reference the new `NodeJS` interface to netcdf4, by Sven Willner. It is available from [https://www.npmjs.com/package/netcdf4](https://www.npmjs.com/package/netcdf4) or from the GitHub repository at [https://github.com/swillner/netcdf4-js](https://github.com/swillner/netcdf4-js).
218 
219 * Incorporated pull request https://github.com/Unidata/netcdf-c/pull/150 from Greg Sjaardema to remove the internal hard-wired use of `NC_MAX_DIMS`, instead using a dynamic memory allocation.
220 
221 ### 4.4.0-RC5 Released - November 11, 2015
222 
223 * Added a fix for https://github.com/Unidata/netcdf-c/issues/149, which was reported several times in quick succession within an hour of the RC4 release.
224 
225 ### 4.4.0-RC4 Released - November 10, 2015
226 
227 * Added CDM-5 support via new mode flag called NC_64BIT_DATA (alias NC_CDF5).
228 
229  Major kudos to Wei-Keng Liao for all the effort he put into getting this to work.
230 
231  This cascaded into a number of other changes.
232 
233  1. Renamed libsrcp5 -> libsrcp because PnetCDF can do parallel io for CDF-1, CDF-2 and CDF-5, not just CDF-5.
234  2. Given #1, then the NC_PNETCDF mode flag becomes a subset of NC_MPIIO, so made NC_PNETCDF an alias for NC_MPII.
235  3. NC_FORMAT_64BIT is now deprecated. Use NC_FORMAT_64BIT_OFFSET.
236 
237 Further information regarding the CDF-5 file format specifrication may be found here: http://cucis.ece.northwestern.edu/projects/PnetCDF/CDF-5.html
238 
239 * Modified configure.ac to provide finer control over parallel
240  support. Specifically, add flags for:
241 
242  1. HDF5_PARALLEL when hdf5 library has parallel enabled
243  2. --disable-parallel4 to be used when we do not want
244  netcdf-4 to use parallelism even if hdf5 has it enabled.
245 
246 
247 * Deprecating various extended format flags.
248 
249 The various extended format flags of the format `NC_FORMAT_FOO` have been refactored into the form `NC_FORMATX_FOO`. The old flags still exist but have been marked as deprecated and will be removed at some point. This was done to avoid confusion between the extended format flags and the format flags `NC_FORMAT_CLASSIC`, `NC_FORMAT_64BIT_OFFSET`, etc. The mapping of deprecated-to-new flags is as follows:
250 
251 Deprecated | Replaced with
252 -----------|-------------
253 NC\_FORMAT\_NC3 | NC\_FORMATX\_NC3
254 NC\_FORMAT\_NC\_HDF5 | NC\_FORMATX\_NC\_HDF5
255 NC\_FORMAT\_NC4 | NC\_FORMATX\_NC4
256 NC\_FORMAT\_NC\_HDF4 | NC\_FORMATX\_NC\_HDF4
257 NC\_FORMAT\_PNETCDF | NC\_FORMATX\_PNETCDF
258 NC\_FORMAT\_DAP2 | NC\_FORMATX\_DAP2
259 NC\_FORMAT\_DAP4 | NC\_FORMATX\_DAP4
260 NC\_FORMAT\_UNDEFINED | NC\_FORMATX\_UNDEFINED
261 
262 * Reduced minimum cmake version to `2.8.11` from `2.8.12`. This will allow for cmake use on a broader set of popular linux platforms without having to do a custom cmake install. See https://github.com/Unidata/netcdf-c/issues/135 for more information.
263 
264 * The documentation section `The Default Chunking Scheme` has been updated with more information. This lives in the `guide.dox` file in the `docs/` directory, or can be found online in the appropriate location (typically http://www.unidata.ucar.edu/netcdf/docs/), once this release has been published.
265 
266 ### 4.4.0-RC3 2015-10-08
267 
268 * Addressed an inefficiency in how bytes would be swapped when converting between `LITTLE` and `BIG` ENDIANNESS. See [NCF-338](https://bugtracking.unidata.ucar.edu/browse/NCF-338) for more information.
269 
270 * Addressed an issue where an interrupted read on a `POSIX` system would return an error even if errno had been properly set to `EINTR`. This issue was initially reported by David Knaak at Cray. More information may be found at [NCF-337](https://bugtracking.unidata.ucar.edu/browse/NCF-337).
271 
272 * Added a note to the install directions pointing out that parallel make
273 cannot be used for 'make check'.
274 
275 ### 4.4.0-RC2 Released 2015-07-09
276 
277 * Minor bug fixes and cleanup of issues reported with first release candidate.
278 
279 ### 4.4.0-RC1 Released 2015-06-09
280 
281 * The pre-built Windows binaries are now built using `Visual Studio 2012`, instead of `Visual Studio 2010`. Source-code compilation remains function with `Visual Studio 2010`, this is just a change in the pre-built binaries.
282 
283 * Added support for opening in-memory file content. See `include/netcdf_mem.h` for the procedure signature. Basically, it allows one to fill a chunk of memory with the equivalent of some netCDF file and then open it and read from it as if it were any other file. See [NCF-328](https://bugtracking.unidata.ucar.edu/browse/NCF-328) for more information.
284 
285 * Addressed an issue when reading hdf4 files with explicit little-endian datatypes. This issue was [reported by Tim Burgess at GitHub](https://github.com/Unidata/netcdf-c/issues/113). See [NCF-332](https://bugtracking.unidata.ucar.edu/browse/NCF-332) for more information.
286 
287 * Addressed an issue with IBM's `XL C` compiler on AIX and how it handled some calls to malloc. Also, as suggested by Wolfgang Hayek, developers using this compiler may need to pass `CPPFLAGS=-D_LINUX_SOURCE_COMPAT` to avoid some test failures.
288 
289 * Addressed an issure in netcdf4 related to specifying an endianness explicitly. When specifying an endianness for `NC_FLOAT`, the value would appear to not be written to file, if checked with `ncdump -s`. The issue was more subtle; the value would be written but was not being read from file properly for non-`NC_INT`. See [GitHub Issue](https://github.com/Unidata/netcdf-c/issues/112) or [NCF-331](https://bugtracking.unidata.ucar.edu/browse/NCF-331) for more information.
290 
291 * Addressed an issue in netcdf4 on Windows w/DAP related to how byte values were copied with sscanf. Issue originally reported by Ellen Johnson at Mathworks, see [NCF-330](https://bugtracking.unidata.ucar.edu/browse/NCF-330) for more information.
292 
293 * Addressed in issue in netcdf4 files on Windows, built with Microsoft Visual Studio, which could result in a memory leak. See [NCF-329](https://bugtracking.unidata.ucar.edu/browse/NCF-329) for more information.
294 
295 * Addressed an issue in netcdf4 files where writing unlimited dimensions that were not declared at head of the dimensions list, as reported by Ellen Johnson at Mathworks. See [NCF-326](https://bugtracking.unidata.ucar.edu/browse/NCF-326) for more information.
296 
297 * Added an authorization reference document as oc2/ocauth.html.
298 
299 * Fixed bug resulting in segmentation violation when trying to add a
300  _FillValue attribute to a variable in an existing netCDF-4 file
301  defined without it (thanks to Alexander Barth). See
302  [NCF-187](https://bugtracking.unidata.ucar.edu/browse/NCF-187) for
303  more information.
304 
305 ## 4.3.3.1 Released 2015-02-25
306 
307 * Fixed a bug related to renaming the attributes of coordinate variables in a subgroup. See [NCF-325](https://bugtracking.unidata.ucar.edu/browse/NCF-325) for more information.
308 
309 ## 4.3.3 Released 2015-02-12
310 
311 * Fixed bug resulting in error closing a valid netCDF-4 file with a dimension and a non-coordinate variable with the same name. [NCF-324](https://bugtracking.unidata.ucar.edu/browse/NCF-324)
312 
313 * Enabled previously-disabled shell-script-based tests for Visual Studio when `bash` is detected.
314 
315 ### 4.3.3-rc3 Released 2015-01-14
316 
317 * Added functionality to make it easier to build `netcdf-fortran` as part of the `netcdf-c` build for *NON-MSVC* builds. This functionality is enabled at configure time by using the following **Highly Experimental** options:
318 
319  * CMake: `-DENABLE_REMOTE_FORTRAN_BOOTSTRAP=ON`
320  * Autotools: `--enable-remote-fortran-bootstrap`
321 
322 Details are as follows:
323 
324 ----
325 
326 Enabling these options creates two new make targets:
327 
328 * `build-netcdf-fortran`
329 * `install-netcdf-fortran`
330 
331 Example Work Flow from netcdf-c source directory:
332 
333 * $ `./configure --enable-remote-fortran-bootstrap --prefix=$HOME/local`
334 * $ `make check`
335 * $ `make install`
336 * $ `make build-netcdf-fortran`
337 * $ `make install-netcdf-fortran`
338 
339 > These make targets are **only** valid after `make install` has been invoked. This cannot be enforced rigidly in the makefile for reasons we will expand on in the documentation, but in short: `make install` may require sudo, but using sudo will discard environmental variables required when attempting to build netcdf-fortran in this manner.<br><br>
340 
341 > It is important to note that this is functionality is for *convenience only*. It will remain possible to build `netcdf-c` and `netcdf-fortran` manually. These make targets should hopefully suffice for the majority of our users, but for corner cases it may still be required of the user to perform a manual build. [NCF-323](https://bugtracking.unidata.ucar.edu/browse/NCF-323)
342 
343 ----
344 
345 * Added a failure state if the `m4` utility is not found on non-Windows systems; previously, the build would fail when it reached the point of invoking m4.
346 
347 * Added an explicit check in the build systems (autotools, cmake) for the CURL-related option `CURLOPT_CHUNK_BGN_FUNCTION`. This option was introduced in libcurl version `7.21.0`. On installations which require libcurl and have this version, `CURLOPT_CHUNK_BGN_FUNCTION` will be available. Otherwise, it will not.
348 
349 * The PnetCDF support was not properly being used to provide mpi parallel io for netcdf-3 classic files. The wrong dispatch table was being used. [NCF-319](https://bugtracking.unidata.ucar.edu/browse/NCF-319)
350 
351 * In nccopy utility, provided proper default for unlimited dimension in chunk-size specification instead of requiring explicit chunk size. Added associated test. [NCF-321](https://bugtracking.unidata.ucar.edu/browse/NCF-321)
352 
353 * Fixed documentation typo in FILL_DOUBLE definition in classic format specification grammar. Fixed other typos and inconsistencies in Doxygen version of User Guide.
354 
355 * For nccopy and ncgen, added numeric options (-3, -4, -6, -7) for output format, to provide less confusing format version specifications than the error-prone equivalent -k options (-k1, -k2, -k3, -k4). The new numeric options are compatible with NCO's mnemonic version options. The old -k numeric options will still be accepted but are deprecated, due to easy confusion between format numbers and format names. [NCF-314](https://bugtracking.unidata.ucar.edu/browse/NCF-314)
356 
357 * Fixed bug in ncgen. When classic format was in force (k=1 or k=4), the "long" datatype should be treated as int32. Was returning an error. [NCF-318](https://bugtracking.unidata.ucar.edu/browse/NCF-318)
358 
359 * Fixed bug where if the netCDF-C library is built with the HDF5 library but without the HDF4 library and one attempts to open an HDF4 file, an abort occurs rather than returning a proper error code (NC_ENOTNC). [NCF-317](https://bugtracking.unidata.ucar.edu/browse/NCF-317)
360 
361 * Added a new option, `NC_EXTRA_DEPS`, for cmake-based builds. This is analogous to `LIBS` in autotools-based builds. Example usage:
362 
363  $ cmake .. -NC_EXTRA_DEPS="-lcustom_lib"
364 
365 More details may be found at the Unidata JIRA Dashboard. [NCF-316](https://bugtracking.unidata.ucar.edu/browse/NCF-316)
366 
367 
368 ### 4.3.3-rc2 Released 2014-09-24
369 
370 * Fixed the code for handling character constants
371  in datalists in ncgen. Two of the problems were:
372  1. It failed on large constants
373  2. It did not handle e.g. var = 'a', 'b', ...
374  in the same way that ncgen3 did.
375  See [NCF-309](https://bugtracking.unidata.ucar.edu/browse/NCF-309).
376 
377 * Added a new file, `netcdf_meta.h`. This file is generated automatically at configure time and contains information related to the capabilities of the netcdf library. This file may be used by projects dependent upon `netcdf` to make decisions during configuration, based on how the `netcdf` library was built. The macro `NC_HAVE_META_H` is defined in `netcdf.h`. Paired with judicious use of `ifdef`'s, this macro will indicate to developers whether or not the meta-header file is present. See [NCF-313](https://bugtracking.unidata.ucar.edu/browse/NCF-313).
378 
379  > Determining the presence of `netcdf_meta.h` can also be accomplished by methods common to autotools and cmake-based build systems.
380 
381 * Changed `Doxygen`-generated documentation hosted by Unidata to use more robust server-based searching.
382 * Corrected embedded URLs in release notes.
383 * Corrected an issue where building with HDF4 support with Visual Studio would fail.
384 
385 ### 4.3.3-rc1 Released 2014-08-25
386 
387 * Added `CMake`-based export files, contributed by Nico Schlömer. See https://github.com/Unidata/netcdf-c/pull/74.
388 
389 * Documented that ncgen input can come from standard input.
390 
391 * Regularized generation of libnetcdf.settings file to make parsing it easier.
392 
393 * Fixed ncdump bug for char variables with multiple unlimited dimensions and added an associated test. Now the output CDL properly disambiguates dimension groupings, so that ncgen can generate the original file from the CDL. [NCF-310](https://bugtracking.unidata.ucar.edu/browse/NCF-310)
394 
395 * Converted the [Manually-maintained FAQ page](http://www.unidata.ucar.edu/software/netcdf/docs/faq.html) into markdown and added it to the `docs/` directory. This way the html version will be generated when the rest of the documentation is built, the FAQ will be under version control, and it will be in a more visible location, hopefully making it easier to maintain.
396 
397 * Bumped minimum required version of `cmake` to `2.8.12`. This was necessitated by the adoption of the new `CMAKE_MACOSX_RPATH` property, for use on OSX.
398 
399 * Jennifer Adams has requested a reversion in behavior so that all dap requests include a constraint. Problem is caused by change in prefetch where if all variables are requested, then no constraint is generated. Fix is to always generate a constraint in prefetch.
400  [NCF-308](https://bugtracking.unidata.ucar.edu/browse/NCF-308)
401 
402 * Added a new option for cmake-based builds, `ENABLE_DOXYGEN_LATEX_OUTPUT`. On those systems with `make` and `pdflatex`, setting this option **ON** will result in pdf versions of the documentation being built. This feature is experimental.
403 
404 * Bumped minimum CMake version to `2.8.9` from `2.8.8` as part of a larger pull request contributed by Nico Schlömer. [Pull Request #64](https://github.com/Unidata/netcdf-c/pull/64)
405 
406 * Replaced the `NetCDF Library Architecture` image with an updated version from the 2012 NetCDF Workshop slides.
407 
408 * Fix HDF4 files to support chunking.
409  [NCF-272](https://bugtracking.unidata.ucar.edu/browse/NCF-272)
410 
411 * NetCDF creates a `libnetcdf.settings` file after configuration now, similar to those generated by `HDF4` and `HDF5`. It is installed into the same directory as the libraries. [NCF-303](https://bugtracking.unidata.ucar.edu/browse/NCF-303).
412 
413 
414 * Renamed `man4/` directory to `docs/` to make the purpose and contents clearer. See [man4 vs. docs #60](https://github.com/Unidata/netcdf-c/issues/60).
415 
416 * Removed redundant variable `BUILD_DOCS` from the CMake configuration file. See the issue at github: [#59](https://github.com/Unidata/netcdf-c/issues/59).
417 
418 * Added missing documentation templates to `man4/Makefile.am`, to correct an issue when trying to build the local `Doxygen`-generated documentation. This issue was reported by Nico Schlömer and may be viewed on github. [Releases miss Doxygen files #56](https://github.com/Unidata/netcdf-c/issues/56)
419 
420 * When the NC_MPIPOSIX flag is given for parallel I/O access and the HDF5 library does not have the MPI-POSIX VFD configured in, the NC_MPIPOSIX flag is transparently aliased to the NC_MPIIO flag within the netCDF-4 library.
421 
422 ## 4.3.2 Released 2014-04-23
423 
424 * As part of an ongoing project, the Doxygen-generated netcdf documentation has been reorganized. The goal is to make the documentation easier to parse, and to eliminate redundant material. This project is ongoing.
425 
426 * The oc .dodsrc reader was improperly handling the user name and password entries. [NCF-299](https://bugtracking.unidata.ucar.edu/browse/NCF-299)
427 
428 * CTestConfig.cmake has been made into a template so that users may easily specify the location of an alternative CDash-based Dashboard using the following two options:
429 
430  * `NC_TEST_DROP_SITE` - Specify an alternative Dashboard by URL or IP address.
431 
432  * `NC_CTEST_DROP_LOC_PREFIX` - Specify a prefix on the remote webserver relative to the root directory. This lets CTest accommodate dashboards that do not live at the top level of the web server.
433 
434 * Return an error code on open instead of an assertion violation for truncated file.
435 
436 * Documented limit on number of Groups per netCDF-4 file (32767).
437 
438 ### 4.3.2-rc2 Released 2014-04-15
439 
440 * Cleaned up a number of CMake inconsistencies related to CMake usage, parallel builds.
441 * Now passing -Wl,--no-undefined to linker when appropriate.
442 * Corrected an issue preventing large file tests from running correctly under Windows.
443 * Misc Bug Fixes detected by static analysis.
444 
445 ### 4.3.2-rc1 Released 2014-03-20
446 
447 * Pre-built Windows downloads will now be bundled with the latest (as of the time of this writing) versions of the various dependencies:
448  * `hdf5: 1.8.12`
449  * `zlib: 1.2.8`
450  * `libcurl: 7.35.0`
451 
452 * Added a separate flag to enable DAP AUTH tests. These tests are disabled by default. The flags for autotools and CMAKE-based builds are (respectively):
453  * --enable-dap-auth-tests
454  * -DENABLE\_DAP\_AUTH\_TESTS
455 
456 * Fixed small default chunk size for 1-dimensional record variables. [NCF-211](https://bugtracking.unidata.ucar.edu/browse/NCF-211)
457 
458 * Cleaned up type handling in netCDF-4 to fix bugs with fill-values.
459 
460 * Corrected "BAIL" macros to avoid infinite loop when logging is disabled and an error occurs.
461 
462 * Refactored how types are used for attributes, variables, and committed types, clarifying and categorizing fields in structs, and eliminating duplicated type information between variables and types they use.
463 
464 * Made type structure shareable by committed datatypes and variables that use it.
465 
466 * Handled string datatypes correctly, particularly for fill value attributes. Expanded testing for string fill values.
467 
468 * Simplified iteration of objects in the file when it's opened, tracking fewer objects and using less memory.
469 
470 * Enabled netCDF-4 bit-for-bit reproducibility for nccopy and other applications (thanks to Rimvydas Jasinskas and Quincey Koziol) by turning off HDF5 object creation, access, and modification time tracking. [NCF-290](https://bugtracking.unidata.ucar.edu/browse/NCF-290)
471 
472 * Addressed an issue where `cmake`-based builds would not properly create a `pkg-config` file. This file is now created properly by `cmake`. [NCF-288](https://bugtracking.unidata.ucar.edu/browse/NCF-288)
473 
474 * Addressed an issue related to old DAP servers. [NCF-287](https://bugtracking.unidata.ucar.edu/browse/NCF-287)
475 
476 * Modified nc_{get/put}_vars to no longer use
477  nc_get/put_varm. They now directly use nc_get/put_vara
478  directly. This means that nc_get/put_vars now work
479  properly for user defined types as well as atomic types.
480  [NCF-228] (https://bugtracking.unidata.ucar.edu/browse/NCF-228)
481 
482 ## 4.3.1.1 Released 2014-02-05
483 
484 This is a bug-fix-only release for version 4.3.1.
485 
486 * Corrected a DAP issue reported by Jeff Whitaker related to non-conforming servers.
487 
488 * Corrected an issue with DAP tests failing in a 64-bit Cygwin environment. [NCF-286](https://bugtracking.unidata.ucar.edu/browse/NCF-286)
489 
490 ## 4.3.1 Released 2014-01-16
491 
492 * Add an extended format inquiry method to the netCDF API: nc\_inq\_format\_extended. NC\_HAVE\_INQ\_FORMAT\_EXTENDED is defined in netcdf.h [NCF-273]
493 
494 [NCF-273]:https://bugtracking.unidata.ucar.edu/browse/NCF-273
495 
496 
497 ### 4.3.1-rc6 Released 2013-12-19
498 
499 * Fixed fill value handling for string types in nc4\_get\_vara().
500 
501 * Corrected behavior of nc\_inq\_unlimdim and nv\_inq\_unlimdims to report dimids
502  in same order as nc\_inq\_dimids.
503 
504 * Addressed an issue reported by Jeff Whitaker regarding `nc_inq_nvars` returning an incorrect number of dimensions (this issue was introduced in 4.3.1-rc5). Integrated a test contributed by Jeff Whitaker.
505 
506 * A number of previously-disabled unit tests were reviewed and made active.
507 
508 
509 ### 4.3.1-rc5 Released 2013-12-06
510 
511 * When opening a netCDF-4 file, streamline the iteration over objects in the underlying HDF5 file.
512 
513 * Fixed netCDF-4 failure when renaming a dimension and renaming a variable using that dimension, in either order. [NCF-177]
514 
515 [NCF-177]:https://bugtracking.unidata.ucar.edu/browse/NCF-177
516 
517 * When compiling with `hdf4` support, both autotools and cmake-based builds now properly look for the `libjpeg` dependency and will link against it when found (or complain if it's not). Also added `ENABLE_HDF4_FILE_TESTS` option to CMake-based builds.
518 
519 * Fixed bug in ncgen; it was not properly filling empty string constants ("") to be the proper length. [NCF-279]
520 
521 [NCF-279]:https://bugtracking.unidata.ucar.edu/browse/NCF-279
522 
523 * Fixed bug in ncgen where it was interpreting int64 constants
524  as uint64 constants. [NCF-278]
525 
526 [NCF-278]:https://bugtracking.unidata.ucar.edu/browse/NCF-278
527 
528 * Fixed bug in handling Http Basic Authorization. The code was actually there but was not being executed. [NCF-277]
529 
530 [NCF-277]:https://bugtracking.unidata.ucar.edu/browse/NCF-277
531 
532 * Added hack to the DAP code to address a problem with the Columbia.edu server. That server does not serve up proper DAP2 DDS replies. The Dataset {...} name changes depending on if the request has certain kinds of constraints. [NCF-276]
533 
534 [NCF-276]:https://bugtracking.unidata.ucar.edu/browse/NCF-276
535 
536 * Fixed bugs with ncdump annotation of values, using -b or -f
537  options. [NCF-275]
538 
539 [NCF-275]:https://bugtracking.unidata.ucar.edu/browse/NCF-275
540 
541 
542 ### 4.3.1-rc4 Released 2013-11-06
543 
544 * Addressed an issue on Windows where `fstat` would report an incorrect file size on files > 4GB. [NCF-219]
545 
546 
547 * Added better documentation about accessing ESG datasets.
548  See http://www.unidata.ucar.edu/software/netcdf/docs/esg.html.
549 
550 * Corrected an issue with CMake-based builds enabling HDF4 support where the HDF4 libraries were in a non-standard location.
551 
552 * Fix bug introduced by [NCF-267] where octal constants above
553 '\177' were not recognized as proper octal constants. [NCF-271]
554 
555 [NCF-271]:https://bugtracking.unidata.ucar.edu/browse/NCF-271
556 
557 * Fixed an issue where the `netcdf.3` man page was not being installed by CMake-based builds. [Github](https://github.com/Unidata/netcdf-c/issues/3)
558 
559 
560 
561 ### 4.3.1-rc3 Released 2013-09-24
562 
563 * Modify ncgen to support NUL characters in character array
564  constants. [NCF-267]
565 
566 [NCF-267]:https://bugtracking.unidata.ucar.edu/browse/NCF-267
567 
568 * Modify ncgen to support disambiguating references to
569  an enum constant in a data list. [NCF-265]
570 
571 [NCF-265]:https://bugtracking.unidata.ucar.edu/browse/NCF-265
572 
573 * Corrected bug in netCDF-4 dimension ID ordering assumptions, resulting in access that works locally but fails through DAP server. [NCF-166]
574 
575 [NCF-166]:https://bugtracking.unidata.ucar.edu/browse/NCF-166
576 
577 * Added a new configuration flag, `NC_USE_STATIC_CRT` for CMake-based Windows builds. The default value is 'OFF'. This will allow the user to define whether to use the shared CRT libraries (\\MD) or static CRT libraries (\\MT) in Visual Studio builds.
578 
579 * Ensure netCDF-4 compiles with OpenMPI as an alternative to MPICH2. [NCF-160]
580 
581 [NCF-160]:https://bugtracking.unidata.ucar.edu/browse/NCF-160
582 
583 * Addressed issue with hanging Parallel netCDF-4 using HDF5 1.8.10. [NCF-240]
584 
585 [NCF-240]:https://bugtracking.unidata.ucar.edu/browse/NCF-240
586 
587 * Addressed issue with Large File Support on Windows, using both 32 and 64-bit builds. [NCF-219]
588 
589 [NCF-219]:https://bugtracking.unidata.ucar.edu/browse/NCF-219
590 
591 * Removed deprecated directories:
592  * librpc/
593  * udunits/
594  * libcf/
595  * libcdmr/
596 
597 ### 4.3.1-rc2 Released 2013-08-19
598 
599 * Added `configure` and accompanying configuration files/templates to release repository. **These will only be added to tagged releases on GitHub**.
600 
601 * Integrated a fix by Quincey Koziol which addressed a variation of [NCF-250], *Fix issue of netCDF-4 parallel independent access with unlimited dimension hanging*.
602 
603 [NCF-250]:https://bugtracking.unidata.ucar.edu/browse/NCF-250
604 
605 * Integrated change contributed by Orion Poplawski which integrated GNUInstallDirs into the netCDF-C CMake system; this will permit systems that install into lib64 (such as Fedora) to `make install` without problem.
606 
607 * Corrected an error with the CMake config files that resulted in the `netcdf.3` manpage not being built or installed.
608 
609 ### 4.3.1-rc1 Released 2013-08-09
610 
611 * Migrated from the netCDF-C `subversion` repository to a publicly available GitHub repository available at https://github.com/Unidata/netCDF-C. This repository may be checked out (cloned) with the following command:
612 
613  $ git clone https://github.com/Unidata/netCDF-C.git
614 
615 * Note: in this release, it is necessary to generate the `configure` script and makefile templates using `autoreconf` in the root netCDF-C directory.:
616 
617  $ autoreconf -i -f
618 
619 * Added `nc_rename_grp` to allow for group renaming in netCDF-4 files. [NCF-204]
620 
621 [NCF-204]: https://bugtracking.unidata.ucar.edu/browse/NCF-204
622 
623 * Added a `NC_HAVE_RENAME_GRP` macro to netcdf.h, [as per a request by Charlie Zender][cz1]. This will allow software compiling against netcdf to easily query whether or not nc\_rename\_grp() is available.
624 
625 [cz1]: https://bugtracking.unidata.ucar.edu/browse/NCF-204
626 
627 * Added Greg Sjaardema's contributed optimization for the nc4\_find\_dim\_len function in libsrc4/nc4internal.c. The patch eliminates several malloc/free calls that exist in the original coding.
628 
629 * Added support for dynamic loading, to compliment the dynamic loading support introduced in hdf 1.8.11. Dynamic loading support depends on libdl, and is enabled as follows: [NCF-258]
630  * autotools-based builds: --enable-dynamic-loading
631  * cmake-based builds: -DENABLE\_DYNAMIC\_LOADING=ON
632 
633 [NCF-258]: https://bugtracking.unidata.ucar.edu/browse/NCF-258
634 
635 * Fix issue of netCDF-4 parallel independent access with unlimited dimension hanging. Extending the size of an unlimited dimension in HDF5 must be a collective operation, so now an error is returned if trying to extend in independent access mode. [NCF-250]
636 
637 [NCF-250]: https://bugtracking.unidata.ucar.edu/browse/NCF-250
638 
639 * Fixed bug with netCDF-4's inability to read HDF5 scalar numeric attributes. Also allow, in addition to zero length strings, a new NULL pointer as a string value. to improve interoperability with HDF5. This required a new CDL constant, 'NIL', that can be output from ncdump for such a string value in an HDF5 or netCDF-4 file. The ncgen utility was also modified to properly handle such NIL values for strings. [NCF-56]
640 
641 [NCF-56]: https://bugtracking.unidata.ucar.edu/browse/NCF-56
642 
643 * Parallel-build portability fixes, particularly for OpenMPI and gcc/gfortran-4.8.x on OSX.
644 
645 * Fix contributed by Nath Gopalaswamy to large file problem reading netCDF classic or 64-bit offset files that have a UINT32_MAX flag for large last record size of a variable that has values larger than 1 byte. This problem had previously been fixed for *writing* such data, but was only tested with an ncbyte variable.
646 
647 * Fixed various minor documentation problems.
648 
649 ## 4.3.0 Released 2013-04-29
650 
651 * fsync: Changed default in autotools config file; fsync must now be
652 explicitly enabled instead of explicitly disabled. [NCF-239]
653 
654 [NCF-239]: https://bugtracking.unidata.ucar.edu/browse/NCF-239
655 
656 * Fixed netCDF-4 bug where odometer code for libdap2 mishandled stride > 1. Bug reported by Ansley Manke. [NCF-249]
657 
658 [NCF-249]: https://bugtracking.unidata.ucar.edu/browse/NCF-249
659 
660 * Fixed netCDF-4 bug so netCDF just ignores objects of HDF5 reference type in
661 the file, instead of rejecting the file. [NCF-29]
662 
663 [NCF-29]: https://bugtracking.unidata.ucar.edu/browse/NCF-29
664 
665 * Fixed netCDF-4 bug with particular order of creation of dimensions,
666 coordinate variables, and subgroups resulting in two dimensions with the
667 same dimension ID. [NCF-244]
668 
669 [NCF-244]: https://bugtracking.unidata.ucar.edu/browse/NCF-244
670 
671 * Fixed netCDF-4 bug with a multidimensional coordinate variable in a
672 subgroup getting the wrong dimension IDs for its dimensions. [NCF-247]
673 
674 [NCF-247]: https://bugtracking.unidata.ucar.edu/browse/NCF-247
675 
676 * Fixed bug with incorrect fixed-size variable offsets in header getting
677 written when schema changed for files created by PnetCDF Thanks
678 to Wei-keng Liao for developing and contributing the fix. [NCF-234]
679 
680 [NCF-234]: https://bugtracking.unidata.ucar.edu/browse/NCF-234
681 
682 * Fixed bug in handling old servers that do not do proper Grid to
683 Structure conversions. [NCF-232]
684 
685 [NCF-232]: https://bugtracking.unidata.ucar.edu/browse/NCF-232
686 
687 * Replaced the oc library with oc2.0
688 
689 * Fix bug with nc\_get\_var1\_uint() not accepting unsigned ints larger
690 than 2\*\*31. [NCF-226]
691 
692 [NCF-226]: https://bugtracking.unidata.ucar.edu/browse/NCF-226
693 
694 * Fix to convert occurrences of '/' in DAP names to %2f. [NCF-223]
695 
696 [NCF-223]: https://bugtracking.unidata.ucar.edu/browse/NCF-223
697 
698 * Fix bug in netCDF-4 with scalar non-coordinate variables with same name
699 as dimensions. [NCF-222]
700 
701 [NCF-222]: https://bugtracking.unidata.ucar.edu/browse/NCF-222
702 
703 * Fix bug in which calling netCDF-4 functions in which behavior that
704 should not depend on order of calls sometimes produces the wrong
705 results. [NCF-217]
706 
707 [NCF-217]: https://bugtracking.unidata.ucar.edu/browse/NCF-217
708 
709 * Merged in nccopy additions from Martin van Driel to support -g and -v
710 options for specifying which groups or variables are to be copied.
711 [NCF-216]
712 
713 [NCF-216]: https://bugtracking.unidata.ucar.edu/browse/NCF-216
714 
715 * Merged in PnetCDF bugs fixes from Greg Sjaardema. [NCF-214]
716 
717 [NCF-214]: https://bugtracking.unidata.ucar.edu/browse/NCF-214
718 
719 * Modify ncgen so that if the incoming file has a special attribute, then
720 it is used to establish the special property of the netcdf file, but the
721 attribute is not included as a real attribute in the file. [NCF-213].
722 
723 [NCF-213]: https://bugtracking.unidata.ucar.edu/browse/NCF-213
724 
725 * Added library version info to the user-agent string so that the server
726 logs will be more informative. [NCF-210]
727 
728 [NCF-210]: https://bugtracking.unidata.ucar.edu/browse/NCF-210
729 
730 * Added work around for bad servers that sometimes sends DAP dataset with
731 duplicate field names. [NCF-208]
732 
733 [NCF-208]: https://bugtracking.unidata.ucar.edu/browse/NCF-208
734 
735 * Fixed bug with strided access for NC\_STRING type. [NCF-206]
736 
737 [NCF-206]: https://bugtracking.unidata.ucar.edu/browse/NCF-206
738 
739 * Prevented adding an invalid \_FillValue attribute to a variable (with
740 nonmatching type or multiple values), to avoid later error when any
741 record variable is extended. [NCF-190]
742 
743 [NCF-190]: https://bugtracking.unidata.ucar.edu/browse/NCF-190
744 
745 * Fix bug in which some uses of vlen within compounds causes HDF5 errors.
746 [NCF-155]
747 
748 [NCF-155]: https://bugtracking.unidata.ucar.edu/browse/NCF-155
749 
750 * Fixed ncdump bug in display of data values of variables that use
751 multiple unlimited dimensions. [NCF-144]
752 
753 [NCF-144]: https://bugtracking.unidata.ucar.edu/browse/NCF-144
754 
755 * Fix bug in which interspersing def\_var calls with put\_var calls can
756 lead to corrupt metadata in a netCDF file with groups and inherited
757 dimensions. [NCF-134]
758 
759 [NCF-134]: https://bugtracking.unidata.ucar.edu/browse/NCF-134
760 
761 * Building shared libraries works with DAP and netCDF4 functionality.
762 [NCF-205] [NCF-57]
763 
764 [NCF-205]: https://bugtracking.unidata.ucar.edu/browse/NCF-205
765 [NCF-57]: https://bugtracking.unidata.ucar.edu/browse/NCF-57
766 
767 * 32-and-64-bit builds are working under MinGW on Windows. [NCF-112]
768 
769 [NCF-112]: https://bugtracking.unidata.ucar.edu/browse/NCF-112
770 
771 * Config.h for Windows compiles are included in the build. [NCF-98]
772 
773 [NCF-98]: https://bugtracking.unidata.ucar.edu/browse/NCF-98
774 
775 * NetCDF-4 dependency on NC\_MAX\_DIMS has been removed. [NCF-71]
776 
777 [NCF-71]: https://bugtracking.unidata.ucar.edu/browse/NCF-71
778 
779 * 64-bit DLL's are produced on Windows. [NCF-65]
780 
781 [NCF-65]: https://bugtracking.unidata.ucar.edu/browse/NCF-65
782 
783 * DLL Packaging issues are resolved. [NCF-54]
784 
785 [NCF-54]: https://bugtracking.unidata.ucar.edu/browse/NCF-54
786 
787 * The CMake build system (with related ctest and cdash systems for
788 testing) has been integrated into netCDF-C. This allows for Visual
789 Studio-based builds in addition to gcc-based builds. This requires at
790 least CMake version 2.8.8. This replaces/supplements the cross-compiled
791 set of Visual-Studio compatible netCDF libraries introduced in netCDF
792 4.2.1-rc1.
793 
794 ## 4.2.1.1 Released 2012-08-03
795 
796 * Patched libdap2/ncdap3.c to fix DAP performance bug remotely accessing large files (> 2GiB).
797 
798 * Patched ncdump/dumplib.c to properly escape special characters in CDL output from ncdump for netCDF-4 string data.
799 
800 
801 ### 4.2.1 Released 2012-07-18
802 
803 * Added a specific NC\_MMAP mode flag to modify behavior of NC\_DISKLESS.
804 
805 * Changed the file protections for NC\_DISKLESS created files to 0666
806 [NCF-182]
807 
808 * Fixed ncdump to report error when an unsupported option is specified.
809 [NCF-180]
810 
811 * Fixed documentation of CDL char constants in Users Guide and ncgen man
812 page.
813 
814 * Fixed memory leak detected by valgrind in one of the HDF5 tests.
815 
816 * Fixed problem with \#elif directives in posixio.c revealed by PGI
817 compilers.
818 
819 ### 4.2.1-rc1 Released 2012-06-18
820 
821 * Ported static and shared libraries (DLL's) for both 32- and 64-bit
822 Windows, including support for DAP remote access, with netCDF-3 and
823 netCDF-4/HDF5 support enabled. The environment for this build is
824 MSYS/MinGW/MinGW64, but the resulting DLLs may be used with Visual
825 Studio. [NCF-112] [NCF-54] [NCF-57] [NCF-65]
826 
827 * Implemented diskless files for all netCDF formats. For nc\_create(),
828 diskless operation performs all operations in memory and then optionally
829 persists the results to a file on close. For nc\_open(), but only for
830 netcdf classic files, diskless operation caches the file in-memory,
831 performs all operations on the memory resident version and then writes
832 all changes back to the original file on close.
833 [NCF-110][NCF-109][NCF-5]
834 
835 * Added MMAP support. If diskless file support is enabled, then it is
836 possible to enable implementation of diskless files using the operating
837 system's MMAP facility (if available). The enabling flag is
838 "--enable-mmap". This is most useful when using nc\_open() and when only
839 parts of files, a single variable say, need to be read.
840 
841 * Added configure flag for --disable-diskless.
842 
843 * Added nccopy command-line options to exploit diskless files, resulting
844 in large speedups for some operations, for example converting unlimited
845 dimension to fixed size or rechunking files for faster access. Upgraded
846 doxygen and man-page documentation for ncdump and nccopy utilities,
847 including new -w option for diskless nccopy, with an example.
848 
849 * Modified Makefile to allow for concurrent builds and to support builds
850 outside the source tree, e.g. 'mkdir build; cd build;
851 SOURCE-DIR/configure' where SOURCE-DIR is the top-level source
852 directory.
853 
854 * Fixed some netCDF-4 bugs with handling strings in non-netCDF-4 HDF5
855 files. [NCF-150]
856 
857 * Fixed bug using nccopy to compress with shuffling that doesn't compress
858 output variables unless they were already compressed in the input file.
859 [NCF-162]
860 
861 * Fixed bug in 64-bit offset files with large records, when last record
862 variable requires more than 2\*\*32 bytes per record. [NCF-164]
863 
864 * Fix bug in which passing a NULL path to nc\_open causes failure.
865 [NCF-173]
866 
867 * Fixed ncgen bugs in parsing and handling opaque data.
868 
869 * Fixed ncdump bug, not escaping characters special to CDL in enumeration
870 labels. [NCF-169]
871 
872 * Fixed bug reading netCDF int into a C longlong or writing from longlong
873 to external int on 32-bit platforms with classic format files. The upper
874 32 bits of the longlong were not cleared on read or used on write.
875 [NCF-171]
876 
877 * Resolved some erroneous returns of BADTYPE errors and RANGE errors due
878 to conflating C memory types with external netCDF types when accessing
879 classic or 64-bit offset files. [NCF-172]
880 
881 * Fixed bug with ncdump -t interpreting unit attribute without base time
882 as a time unit. [NCF-175]
883 
884 * Changed port for testing remote access test server to increase
885 reliability of tests.
886 
887 * Modified ncio mechanism to support multiple ncio packages, so that it is
888 possible to have e.g. posixio and memio operating at the same time.
889 
890 * Generation of documentation is disabled by default. Use --enable-doxygen
891 to generate. [NCF-168]
892 
893 * Added description of configure flags to installation guide.
894 
895 * Clarified documentation of arguments to nc**open() and nc**create() and
896 their default values.
897 
898 * Fixed doxygen installation guide source file to preserve line breaks in
899 code and scripts. [NCF-174]
900 
901 * Cleaned up a bunch of lint issues (unused variables, etc.) and some
902 similar problems reported by clang static analysis.
903 
904 * Updated and fixed pkg-config source file netcdf.pc.in to work with
905 separated netCDF language-specific packages. Also fixed nc-config to
906 call nf-config, ncxx-config, and ncxx4-config for for backward
907 compatibility with use of nc-config in current Makefiles. [NCF-165]
908 [NCF-179]
909 
910 ## 4.2.0 2012-05-01
911 
912 * Completely rebuilt the DAP constraint handling. This primarily affects
913 users who specify a DAP constraint as part of their URL. [NCF-120]
914 
915 * Fixed cause of slow nccopy performance on file systems with many records
916 and large disk block size or many record variables, by accessing data a
917 record at a time instead of a variable at a time. [NCF-142]
918 
919 * Performance improvement to DAP code to support fetching partial
920 variables into the cache; especially important when using nc\_get\_var()
921 API. A partial variable is one that has ranges attached to the
922 projection variables (e.g. x[1:10][20:21]) [NCF-157]
923 
924 * Separate the Fortran and C++ libraries and release the C library and
925 ncdump/ncgen/nccopy without Fortran or C++. [NCF-24]
926 
927 * Documentation mostly migrated to Doxygen, from Texinfo. [NCF-26]
928 
929 * Properly convert vara start/count parameters to DAP [NCF-105][NCF-106]
930 
931 * Fixed major wasted space from previous default variable chunk sizes
932 algorithm. [NCF-81]
933 
934 * Fixed bug in nccopy, in which compression and chunking options were
935 ignored for netCDF-4 input files. [NCF-79]
936 
937 * Fixed bug in ncgen in which large variables (more than 2**18 elements)
938 duplicates the first 2**18 values into subsequent chunks of data
939 [NCF-154].
940 
941 * Applied Greg Sjaardema's nccopy bug fix, not compressing output
942 variables f they were not already using compression on the input file
943 when shuffle specified. [NCF-162]
944 
945 * Fixed problem when a URL is provided that contains only a host name.
946 [NCF-103]
947 
948 * Fixed behavior of ncgen flags so that -o => -lb and, in the absence of
949 any other markers, make the default be -k1 [NCF-158]
950 
951 * Created a text INSTALL file for netCDF-4.2 release. [NCF-161]
952 
953 * Fixed bug in ncgen for vlen arrays as fields of compound types where
954 datalists for those types was improperly interpreted [NCF-145] (but see
955 NCF-155).
956 
957 * Improve use of chunk cache in nccopy utility, making it practical for
958 rechunking large files. [NCF-85]
959 
960 * Fixed nccopy bug copying a netCDF-4 file with a chunksize for an
961 unlimited dimension that is larger than the associated dimension size.
962 [NCF-139]
963 
964 * Fixed nccopy bug when rechunking a netCDF-4 file with a chunkspec option
965 that doesn't explicitly specify all dimensions. [NCF-140]
966 
967 * Fixed bug in netCDF-4 files with non-coordinate variable with the same
968 name as a dimension. [NCF-141]
969 
970 * Incorporated Wei Huang's fix for bug where netCDF-4 sometimes skips over
971 too many values before adding fill values to an in-memory buffer.
972 [NCF-143]
973 
974 * Fixed ncgen bug with netCDF-4 variable-length constants (H/T to Lynton
975 Appel). [NCF-145]
976 
977 * Incorporated Peter Cao's performance fixes using HDF5 link iterator for
978 any group with many variables or types. [NCF-148]
979 
980 * Incorporated Constantine Khroulev's bug fix for invalid usage of
981 MPI\_Comm\_f2c in nc\_create\_par. [NCF-135]
982 
983 * Fixed turning off fill values in HDF5 layers when NOFILL mode is set in
984 netCDF-4 API (thanks to Karen Schuchardt). [NCF-151]
985 
986 * Fixed bug with scalar coordinate variables in netCDF-4 files, causing
987 failure with --enable-extra-tests [NCF-149]
988 
989 * Cleaned up the definition and use of nulldup. [NCF-92][NCF-93][NCF-94]
990 
991 * Fixed various '\#include' bugs. [NCF-91][NCF-96][NCF-127]
992 
993 * v2 API functions modified to properly call the external API instead of
994 directly calling the netcdf-3 functions. [NCF-100]
995 
996 * Fixed problem with 64-bit offset format where writing more than 2\*\*31
997 records resulted in erroneous NC\_EINVALCOORDS error. [NCF-101]
998 
999 * Restored original functionality of ncgen so that a call with no flags,
1000 only does the syntax check. [NCF-104]
1001 
1002 * Corrected misc. test bugs [NCF-107]
1003 
1004 * Modified ncdump to properly output various new types (ubyte, ushort,
1005 uint, int64, and uint64). [NCF-111]
1006 
1007 * Fixed incorrect link flag for szip in configure.ac [NCF-116]
1008 
1009 * ncdump -t now properly parses ISO "T" separator in date-time strings.
1010 [NCF-16]
1011 
1012 * ncdump -t "human time" functionality now available for attributes and
1013 bounds variables [NCF-70]
1014 
1015 * In ncdump, add -g option to support selection of groups for which data
1016 is displayed. [NCF-11]
1017 
1018 * Now supports bluefire platform [NCF-52]
1019 
1020 * ncdump now properly displays values of attributes of type NC\_USHORT as
1021 signed shorts [NCF-82]
1022 
1023 * Rename some code files so that there are no duplicate filenames.
1024 [NCF-99]
1025 
1026 * Demonstration of netCDF-4 Performance Improvement with KNMI Data
1027 [NCF-113]
1028 
1029 * Dimension size in classic model netCDF-4 files now allows larger sizes
1030 than allowed for 64-bit offset classic files. [NCF-117]
1031 
1032 * ncdump now reports correct error message when "-x" option specifying
1033 NcML output is used on netCDF-4 enhanced model input. [NCF-129]
1034 
1035 * Fixed bug causing infinite loop in ncdump -c of netCDF-4 file with
1036 subgroup with variables using inherited dimensions. [NCF-136]
1037 
1038 ## 4.1.3 2011-06-17
1039 
1040 * Replace use of --with-hdf5= and other such configure options that
1041 violate conventions and causes build problems. Set environment variables
1042 CPPFLAGS, LDFLAGS, and LD\_LIBRARY\_PATH instead, before running
1043 configure script. [NCF-20]
1044 
1045 * Detect from configure script when szlib is needed [NCF-21]
1046 
1047 * Fix bug that can silently zero out portions of a file when writing data
1048 in nofill mode beyond the end of a file, crossing disk-block boundaries
1049 with region to be written while in-memory buffer is in a specific state.
1050 This bug was observed disabling fill mode using Lustre (or other large
1051 blksize file system) and writing data slices in reverse order on disk.
1052 [NCF-22]
1053 
1054 * Fix bug that prevents netCDF-4/HDF5 files created with netCDF-4.1.2 from
1055 being read by earlier versions of netCDF or HDF5 versions before 1.8.7.
1056 [NCF-23]
1057 
1058 * Fix bug in configure that did not make the search for the xdr library
1059 depend on --enable-dap. [NCF-41]
1060 
1061 * Fix ncgen bug that did not use the value of a \_Format attribute in the
1062 input CDL file to determine the kind of output file created, when not
1063 specified by the -k command-line flag. [NCF-42]
1064 
1065 * Fix ncgen bug, not properly handling unsigned longlong parsing. [NCF-43]
1066 
1067 * Fix DAP client code to suppress variables with names such as "x.y",
1068 which DAP protocol interprets as variable "y" inside container "x". Such
1069 variables will be invisible when accessed through DAP client. [NCF-47]
1070 
1071 * Define uint type for unsigned integer, if not otherwise available.
1072 Symptom was compile error involving uint in putget.c. [NCF-49]
1073 
1074 * Fix username+password handling in the DAP client code. [NCF-50]
1075 
1076 * Add test for handling parallel I/O problem from f77 when user forgets to
1077 turn on one of the two MPI flags. [NCF-60]
1078 
1079 * Resolved "make check" problems when ifort compiler. Some "make install"
1080 problems remain when using MPI and shared libraries. [NCF-61]
1081 
1082 * Fix problem with f90\_def\_var not always handle deflate setting when
1083 compiler was ifort. [NCF-67]
1084 
1085 * Check that either MPIIO or MPIPOSIX flag is set when parallel create or
1086 open is called. Also fix examples that didn't set at least one of these
1087 flags. [NCF-68]
1088 
1089 * Improve documentation on handling client-side certificates [NCF-48]
1090 
1091 * Document that array arguments, except in varm functions, must point to
1092 contiguous blocks of memory. [NCF-69]
1093 
1094 * Get netCDF-4 tests working for DLLs generated with mingw. [NCF-6]
1095 
1096 * Make changes necessary for upgrading to HDF5 1.8.7 [NCF-66]
1097 
1098 ### 4.1.3-rc1 2011-05-06
1099 
1100 * Stop looking for xdr if --disable-dap is used.
1101 
1102 * Don't try to run (some) fortran configure tests on machines with no
1103 fortran.
1104 
1105 * Allow nccopy to rechunk with chunksizes larger than current dimension
1106 lengths.
1107 
1108 * Initial implementation of CDMREMOTE is complete; needs comprehensive
1109 testing.
1110 
1111 ### 4.1.3-beta1 2011-04-29
1112 
1113 * Fixed szlib not linking bug.
1114 
1115 * Fixed dreaded "nofill bug", lurking in netCDF classic since at least
1116 1999. Writing more than a disk block's worth of data that crossed disk
1117 block boundaries more than a disk block beyond the end of file in nofill
1118 mode could zero out recently written earlier data that hadn't yet been
1119 flushed to disk.
1120 
1121 * Changed setting for H5Pset\_libver\_bounds to ensure that all netCDF-4
1122 files can be read by HDF5 1.8.x.
1123 
1124 * Merged libncdap3 and libncdap4 into new libdap2 library. The suffix dap2
1125 now refers to the dap protocol. This is in prep for adding dap4 protocol
1126 support.
1127 
1128 * Took out --with-hdf5 and related options due to high cost of maintaining
1129 this non-standard way of finding libraries.
1130 
1131 ## 4.1.2 2011-03-29
1132 
1133 * Changes in build system to support building dlls on cygwin/mingw32.
1134 
1135 * Changes to fix portability problems and get things running on all test
1136 platforms.
1137 
1138 * Some minor documentation fixes.
1139 
1140 * Fixed opendap performance bug for nc\_get\_vars; required adding
1141 nc\_get\_var{s,m} to the dispatch table.
1142 
1143 * Now check for libz in configure.ac.
1144 
1145 * Fixed some bugs and some performance problems with default chunksizes.
1146 
1147 ### 4.1.2-beta2 2011-01-11
1148 
1149 * Add "-c" option to nccopy to specify chunk sizes used in output in terms
1150 of list of dimension names.
1151 
1152 * Rewrite netCDF-4 attribute put code for a large speedup when writing
1153 lots of attributes.
1154 
1155 * Fix nc-config --libs when static dependent libraries are not installed
1156 in the same directory as netCDF libraries (thanks to Jeff Whitaker).
1157 
1158 * Build shared libraries by default, requiring separate Fortran library.
1159 Static libraries now built only with --disable-shared.
1160 
1161 * Refactor of HDF5 file metadata scan for large speedup in opening files,
1162 especially large files.
1163 
1164 * Complete rewrite of the handling of character datalist constants. The
1165 heuristics are documented in ncgen.1.
1166 
1167 * Eliminate use of NC\_MAX\_DIMS and NC\_MAX\_VARS in ncdump and nccopy,
1168 allocating memory as needed and reducing their memory footprint.
1169 
1170 * Add documentation for new nc\_inq\_path() function.
1171 
1172 * Use hashing to speedup lookups by name for files with lots of dimensions
1173 and variables (thanks to Greg Sjaardema).
1174 
1175 * Add options to nccopy to support uniform compression of variables in
1176 output, shuffling, and fixing unlimited dimensions. Documented in
1177 nccopy.1 man page and User's Guide.
1178 
1179 ### 4.1.2-beta1 2010-07-09
1180 
1181 * Fix "ncdump -c" bug identifying coordinate variables in groups.
1182 
1183 * Fix bug in libsrc/posixio.c when providing sizehint larger than default,
1184 which then doesn't get used (thanks to Harald Anlauf).
1185 
1186 * Fix netCDF-4 bug caused when doing enddef/redef and then defining
1187 coordinate variable out of order.
1188 
1189 * Fixed bug in man4 directory automake file which caused documentation to
1190 be rebuilt after make clean.
1191 
1192 * Turned off HDF5 caching when parallel I/O is in use because of its
1193 memory use.
1194 
1195 * Refactoring of netCDF code with dispatch layer to decide whether to call
1196 netCDF classic, netCDF-4, or opendap version of a function.
1197 
1198 * Refactoring of netCDF-4 memory internals to reduce memory use and end
1199 dependence on NC\_MAX\_DIMS and NC\_MAX\_NAME.
1200 
1201 * Modified constraint parser to be more compatible with a java version of
1202 the parser.
1203 
1204 * Modified ncgen to utilize iterators internally; should be no user
1205 visible effect.
1206 
1207 * Fixed two large-file bugs with using classic format or 64-bit offset
1208 format and accessing multidimensional variables with more than 2\*\*32
1209 values.
1210 
1211 ## 4.1.1 2010-04-01
1212 
1213 * Fixed various build issues.
1214 
1215 * Fixed various memory bugs.
1216 
1217 * Fixed bug for netCDF-4 files with dimensions and coord vars written in
1218 different orders, with data writes interspersed.
1219 
1220 * Added test for HDF5-1.8.4 bug.
1221 
1222 * Added new C++ API from Lynton Appel.
1223 
1224 ## 4.1 2010-01-30
1225 
1226 * Much better memory leak checking with valgrind.
1227 
1228 * Added per-variable chunk cache control for better performance. Use
1229 nc\_set\_var\_chunk\_cache / nf\_set\_var\_chunk\_cache /
1230 nf90\_set\_var\_chunk\_cache to set the per-variable cache.
1231 
1232 * Automatically set per-variable chunk cache when opening a file, or
1233 creating a variable, so that the cache is big enough for more than one
1234 chunk. (Can be overridden by user). Settings may be changed with
1235 configure options --max-default-chunk-size and
1236 --default-chunks-in-cache.
1237 
1238 * Better default chunks size. Now chunks are sized to fit inside the
1239 DEFAULT\_CHUNK\_SIZE (settable at configure time with
1240 --with-default-chunk-size= option.)
1241 
1242 * Added nccopy utility for converting among netCDF format variants or to
1243 copy data from DAP servers to netCDF files.
1244 
1245 * The oc library has been modified to allow the occurrence of alias
1246 definitions in the DAS, but they will be ignored.
1247 
1248 * The old ncgen has been moved to ncgen3 and ncgen is now the new ncgen4.
1249 
1250 * Modified --enable-remote-tests to be on by default.
1251 
1252 * Fixed the nc\_get\_varm code as applied to DAP data sources.
1253 
1254 * Added tests for nc-config.
1255 
1256 * Many documentation fixes.
1257 
1258 * Added capability to use the PnetCDF library to
1259 perform parallel I/O on classic and 32-bit offset files. Use the
1260 NC\_PNETCDF mode flag to get parallel I/O for non-netcdf-4 files.
1261 
1262 * Added libcf library to netCDF distribution. Turn it on with configure
1263 option --with-libcf.
1264 
1265 * Added capability to read HDF4 files created with the SD (Scientific
1266 Data) API.
1267 
1268 * The DAP support was revised to closely mimic the original libnc-dap
1269 support.
1270 
1271 * Significantly revised the data handling mechanism in ncgen4 to more
1272 closely mimic the output from the original ncgen.
1273 
1274 * Added prototype NcML output capability to ncgen4. It is specified by the
1275 -lcml flag.
1276 
1277 * Added capability to read HDF5 files without dimension scales. This will
1278 allow most existing HDF5 datasets to be read by netCDF-4.
1279 
1280 * Fixed bug with endianness of default fill values for integer types when
1281 variables are created with a non-native endiannesss and use the default
1282 fill value.
1283 
1284 * Significant refactoring of HDF5 type handling to improve performance and
1285 handle complicated nesting of types in cross-platform cases.
1286 
1287 * Added UDUNITS2 to the distribution. Use --with-udunits to build udunits
1288 along with netcdf.
1289 
1290 * Made changes suggested by HDF5 team to relax creation-order requirement
1291 (for read-only cases) which allows HDF5 1.6.x files to be retrofitted
1292 with dimension scales, and be readable to netCDF-4.
1293 
1294 * Handle duplicate type names within different groups in ncdump. Fix group
1295 path handling in absolute and relative variable names for "-v" option.
1296 
1297 * Added nc-config shell script to help users build netCDF programs without
1298 having to figure out all the compiler options they will need.
1299 
1300 * Fixed ncdump -s bug with displaying special attributes for classic and
1301 64-bit offset files.
1302 
1303 * For writers, nc\_sync() now calls fsync() to flush data to disk sooner.
1304 
1305 * The nc\_inq\_type() function now works for primitive types.
1306 
1307 ## 4.0.1 2009-03-26
1308 
1309 * Added optional arguments to F90 API to nf90\_open/create,
1310 nf90\_create\_var, and nf90\_inquire\_variable so that all netCDF-4
1311 settings may be accomplished with optional arguments, instead of
1312 separate function calls.
1313 
1314 * Added control of HDF5 chunk cache to allow for user performance tuning.
1315 
1316 * Added parallel example program in F90.
1317 
1318 * Changed default chunking to better handle very large variables.
1319 
1320 * Made contiguous the default for fixed size data sets with no filters.
1321 
1322 * Fixed bug in nc\_inq\_ncid; now it returns NC\_ENOGRP if the named group
1323 is not found.
1324 
1325 * Fixed man pages for C and F77 so that netCDF-4 builds will result in man
1326 pages that document new netCDF-4 functions.
1327 
1328 * Added OPeNDAP support based on a new C-only implementation. This is
1329 enabled using --enable-dap option and requires libcurl. The configure
1330 script will attempt to locate libcurl, but if it fails, then its
1331 location must be specified by the --with-curl option.
1332 
1333 ### 4.0.1-beta2 2008-12-26
1334 
1335 * Changed chunksizes to size\_t from int.
1336 
1337 * Fixed fill value problem from F77 API.
1338 
1339 * Fixed problems in netcdf-4 files with multi-dimensional coordinate
1340 variables.
1341 
1342 * Fixed ncgen to properly handle CDL input that uses Windows line endings
1343 ("\r\n"), instead of getting a syntax error.
1344 
1345 * Added "-s" option to ncdump to display performance characteristics of
1346 netCDF-4 files as special virtual attributes, such as \_Chunking,
1347 \_DeflateLevel, \_Format, and \_Endianness.
1348 
1349 * Added "-t" option to ncdump to display times in human readable form as
1350 strings. Added code to interpret "calendar" attribute according to CF
1351 conventions, if present, in displaying human-readable times.
1352 
1353 * Added experimental version of ncgen4 capable of generating netcdf-4 data
1354 files and C code for creating them. In addition, it supports the special
1355 attributes \_Format, etc.
1356 
1357 * 4.0.1-beta1 2008-10-16
1358 
1359 * Fixed Fortran 90 int64 problems.
1360 
1361 * Rewrote HDF5 read/write code in accordance with performance advice from
1362 Kent.
1363 
1364 * Fixed memory leaks in gets/puts of HDF5 data.
1365 
1366 * Fixed some broken tests for parallel I/O (i.e. MPI) builds.
1367 
1368 * Fixed some cross-compile problems.
1369 
1370 * Rewrote code which placed bogus errors on the HDF5 error stack, trying
1371 to open non-existent attributes and variables. Now no HDF5 errors are
1372 seen.
1373 
1374 * Removed man subdirectory. Now man4 subdirectory is used for all builds.
1375 
1376 * Changed build so that users with access to parallel make can use it.
1377 
1378 * Added experimental support for accessing data through OPeNDAP servers
1379 using the DAP protocol (use --enable-opendap to build it).
1380 
1381 * Fixed ncdump bugs with array field members of compound type variables.
1382 Fixed ncdump bug of assuming default fill value for data of type
1383 unsigned byte.
1384 
1385 ## 4.0 2008-05-31
1386 
1387 * Introduced the use of HDF5 as a storage layer, which allows use of
1388 groups, user-defined types, multiple unlimited dimensions, compression,
1389 data chunking, parallel I/O, and other features. See the netCDF Users
1390 Guide for more information.
1391 
1392 ## 3.6.3 2008-05-31
1393 
1394 * In ncdump and ncgen, added CDL support for UTF-8 encoding of characters
1395 in names and for escaped special chars in names. Made sure UTF-8 names
1396 are normalized using NFC rules before storing or comparing.
1397 
1398 * Handle IEEE NaNs and infinities in a platform-independent way in ncdump
1399 output.
1400 
1401 * Added support for ARM representation of doubles, (thanks to Warren
1402 Turkal).
1403 
1404 * Fixed bug in C++ API creating 64-bit offset files. (See
1405 http://www.unidata.ucar.edu/software/netcdf/docs/known_problems.html#cxx_64-bit).
1406 
1407 * Fixed bug for variables larger than 4 GB. (See
1408 http://www.unidata.ucar.edu/software/netcdf/docs/known_problems.html#large_vars_362).
1409 
1410 * Changed the configure.ac to build either 3.6.x or 4.x build from the
1411 same configure.ac.
1412 
1413 * Build now checks gfortran version and handles it cleanly, also Portland
1414 Group in Intel fortran, with various configurations.
1415 
1416 * A Fortran netcdf.inc file is now created at build time, based on the
1417 setting of --disable-v2.
1418 
1419 * Documentation has been fixed in several places.
1420 
1421 * Upgraded to automake 1.10, autoconf 2.62, and libtool 2.2.2.
1422 
1423 * Includes missing Windows Visual Studio build files.
1424 
1425 * Fixed missing include of config.h in a C++ test program.
1426 
1427 * Fixed maintainer-clean in man directory.
1428 
1429 * Fixed --enable-c-only and make check.
1430 
1431 * Fixed behavior when opening a zero-length file.
1432 
1433 * Many portability enhancements to build cleanly on various platforms.
1434 
1435 * Turned on some old test programs which were not being used in the build.
1436 
1437 ## 3.6.2 2007-03-05
1438 
1439 * Released.
1440 
1441 ### 3.6.2 beta6 2007-01-20
1442 
1443 * Fine tuning of build system to properly handle cygwin, Mingw, and
1444 strange configuration issues.
1445 
1446 * Automake 1.10 has a problem with running our tests on MinGW, so I'm
1447 switching back to automake 1.9.6 for this release.
1448 
1449 ### 3.6.2 beta5 2006-12-30
1450 
1451 * Now netCDF configuration uses autoconf 2.61, and automake 1.10. (Thanks
1452 to Ralf Wildenhues for the patches, and all the autotools help in
1453 general!)
1454 
1455 * Final major revision of netCDF tutorial before the 3.6.2 release.
1456 
1457 * Now netCDF builds under MinGW, producing a windows DLL with the C and
1458 F77 APIs. Use the --enable-shared --enable-dll --disable-cxx
1459 --disable-f90 flags to configure. (C++ and F90 have never been built as
1460 windows DLLs, but might be in a future release if there is user
1461 interest). This has all been documented in the netCDF Porting and
1462 Installation Guide.
1463 
1464 * Now extreme numbers (i.e. those close to the limits of their type) can
1465 be turned off in nc\_test/nf\_test, with --disable-extreme-numbers. It
1466 is turned off automatically for Solaris i386 systems.
1467 
1468 * Added --enable-c-only option to configure. This causes only the core
1469 netCDF-3 C library to be built. It's the same as --disable-f77
1470 --disable-cxx --disable-v2 --disable-utilities.
1471 
1472 * Added --disable-utilities to turn off building and testing of
1473 ncgen/ncdump.
1474 
1475 * Fix a long-standing bug in nf90\_get\_att\_text() pointed out by Ryo
1476 Furue, to make sure resulting string is blank-padded on return. This is
1477 fixed in the Fortran-90 interface, but is impractical to fix in the
1478 Fortran-77 interface implemented via cfortran.h.
1479 
1480 * Now large file tests are run if --enable-large-file-tests is used in the
1481 configure.
1482 
1483 * For Cray users, the ffio module is used if the --enable-ffio option is
1484 passed to configure.
1485 
1486 * Unrolled loops in byte-swapping code used on little-endian platforms to
1487 reduce loop overhead. This optimization resulted in a 22% speedup for
1488 some applications accessing floats or ints (e.g. NCO utilities ncap and
1489 ncbo) and a smaller speedup for shorts or doubles.
1490 
1491 * Added "-k" option to ncdump and ncgen, for identifying and specifying
1492 the kind of netCDF file, one of "classic", "64-bit-offset", "hdf5", or
1493 "hdf5-nc3". Removed output of kind of netCDF file in CDL comment
1494 produced by ncdump.
1495 
1496 * Fixed bug of ncdump seg-faulting if invoked incorrectly with option like
1497 "-c" or "-h" but no file name.
1498 
1499 ### 3.6.2 beta4 2006-08-15
1500 
1501 * Changed F77/F90 man pages from netcdf.3f and netcdf.3f90 to
1502 netcdf\_f77.3 and netcdf\_f90.3. Also fixed broken install of man pages.
1503 
1504 * Changed configure script so that "-g -O2" is no longer set as CFLAGS,
1505 CXXFLAGS, and FFLAGS by default if a GNU compiler is being used. Now
1506 nothing is set.
1507 
1508 * Changed configure script so that fortran flag is set in config.h.
1509 
1510 * Updated Installation and Porting Guide, C++ Interface Guide, F77 and F90
1511 Interface Guides.
1512 
1513 * Build with static libraries by default.
1514 
1515 * Added configure option --enable-separate-fortran, which causes the
1516 fortran library to be built separately. This is turned on automatically
1517 for shared libraries.
1518 
1519 * Improved clarity of error messages.
1520 
1521 * Changed configuration to get cygwin DLL and mingw DLL builds working,
1522 for the C library only (i.e. no F77, F90, or C++ APIs).
1523 
1524 * Changed type of ncbyte in C++ interface from unsigned char to signed
1525 char, for consistency with C interface. The C++ documentation warned
1526 this change would eventually occur.
1527 
1528 * Changed the C++ interface to use only the netCDF-3 C interface instead
1529 of the older netCDF-2 C interface. This has the added benefit that
1530 on-the-fly numeric conversions are now supported using get methods, for
1531 example you can get data of any type as double. When using --disable-v2
1532 flag to configure, the C++ interface can now be built and installed.
1533 
1534 ### 3.6.2 beta3 2006-05-24
1535 
1536 * Changed to use default prefix of /usr/local instead of package-based
1537 prefix of previous releases of netCDF. Use the --prefix argument to the
1538 configure script to override the default.
1539 
1540 * Made separate fortran library file, instead of appending fortran library
1541 functions to the C library file, if --enable-separate-fortran is used
1542 during configure (it's turned on automatically if --enable-shared is
1543 used). If uses, the fortran API users must link to *both* the C library
1544 and the new fortran library, like this: -lnetcdff -lnetcdf
1545 
1546 * Added netCDF examples in C, C++, F77, F90, and CDL. See the examples
1547 subdirectory.
1548 
1549 * Added the NetCDF Tutorial.
1550 
1551 * Minor fixes to some of the netCDF documentation.
1552 
1553 * Made it possible to build without V2 API using --disable-v2 from
1554 configure.
1555 
1556 * Switched to new build system, with automake and libtool. Now shared
1557 libraries are built (as well as static ones) on platforms which support
1558 it. For more information about shared libraries, see
1559 http://www.unidata.ucar.edu/software/netcdf/docs/faq.html#shared_intro
1560 
1561 * Fixed ncdump crash that happened when no arguments were used.
1562 
1563 * Fixed for building with gfortran 4.1.0.
1564 
1565 * Important fix for machines whose SIZEOF\_SIZE\_T != SIZEOF\_LONG, such
1566 as NEC-SX, thanks to Stephen Leak.
1567 
1568 * Fixed C++ on AIX platform.
1569 
1570 * Fixed 64-bit builds on AIX platform.
1571 
1572 * Removed bad assertion that could be triggered in rare cases when reading
1573 a small file.
1574 
1575 * Added comments in v1hpg.c to clarify purpose of each internal function.
1576 
1577 * Make sure filesize is determined in nc\_close() *after* buffers get
1578 flushed.
1579 
1580 * Fix long-standing problem resulting in files up to 3 bytes longer than
1581 necessary if there is exactly one record variable of type byte, char, or
1582 short and if the number of values per record for that variable is not
1583 divisible by 4 (or 2 in the case of short). Now the filesize determined
1584 from header info by NC\_calcsize should be correct in all cases.
1585 
1586 ## 3.6.1 2006-01-31
1587 
1588 * Updated installation manual for 3.6.1.
1589 
1590 * Changed installation to try to provide correct compiler flags for
1591 compiling in 64-bit mode on Sun, Irix, AIX, and HPUX. (HPUX doesn't work
1592 for me, however). Now run configure with --enable-64bit to get a 64 bit
1593 compile.
1594 
1595 * Fixed long-standing bug that would cause small netCDF files to be padded
1596 on the end with zero bytes to 4096 bytes when they were opened and
1597 changed. Now small files should stay small after you change a value.
1598 
1599 * Fixed bug in assertions in putget.c that would only be noticed if you
1600 change the manifest constant NC\_MAX\_DIMS in netcdf.h to be different
1601 from NC\_MAX\_VAR\_DIMS.
1602 
1603 * Moved test ftest.F from fortran to nf\_test directory, and fixed bug in
1604 ftest.F which caused it to return 0 even if tests failed (no tests were
1605 failing, however). Also renamed some test output files to make things a
1606 little clearer.
1607 
1608 * If open for writing, pad with up to 3 extra zero bytes before close to
1609 the correct canonical length, calculated from the header. Previously
1610 files could be short due to not padding when writing in NOFILL mode.
1611 
1612 * Doubled arbitrary limits on number of dimensions, variables, attributes,
1613 and length of names.
1614 
1615 * Change name of nc\_get\_format() to nc\_inq\_format(). Add analogous
1616 interfaces for nf\_inq\_format(), nf90\_inquire(), and
1617 NcFile::get\_format() to f77, f90, and C++ interfaces. Document new
1618 function in texinfo files. Add minimal test to nc\_test, nf\_test.
1619 
1620 ### 3.6.1-beta3 2005-02-17
1621 
1622 * Added function nc\_get\_format(int ncid, int\* formatp) that returns
1623 either NC\_FORMAT\_CLASSIC or NC\_FORMAT\_64BIT for a CDF1 or CDF2 file,
1624 respectively.
1625 
1626 * Added test to nc\_test that detects whether format version was changed
1627 after a file is reopened and define mode is entered.
1628 
1629 * Correctly configure for Intel ifort Fortran compiler on Linux.
1630 
1631 ### 3.6.0-p1 2005-02-18
1632 
1633 * Fixed bug that changes CDF2 files to CDF1 files if CDF2 file is reopened
1634 for write access and either an attribute is changed or define mode is
1635 entered.
1636 
1637 ### 3.6.1-beta2 2005-1-6
1638 
1639 * Fixed absoft compile problem. Maybe.
1640 
1641 ### 3.6.1-beta1 2005-1-3
1642 
1643 * Fixed Cygwin C++ problem.
1644 
1645 * Fixed large file problem in MS Visual C++.NET environment.
1646 
1647 * More information in installation and porting guide.
1648 
1649 ## 3.6.0 2004-12-16
1650 
1651 * Added texinfo source for the documentation.
1652 
1653 * Added large file tests to Windows directory in distribution.
1654 
1655 * Modified win32 visual studio project files so that m4 is no longer
1656 required to build netcdf under visual studio.
1657 
1658 * Modified rules.make to use install instead of cp, fixing install problem
1659 for cygwin users.
1660 
1661 * Modified configure/install stuff to support HP-UX.
1662 
1663 * Modified configure/install stuff to support G95.
1664 
1665 * In the f90 interface, applied Arnaud Desitter's fixes to correct
1666 mismatches between scalar and array arguments, eliminating (legitimate)
1667 complaints by the NAGWare f95 compiler. Also fixed bugs introduced in
1668 3.6.0-beta5 in the mapped array interfaces.
1669 
1670 ### 3.6.0-beta6 2004-10-05
1671 
1672 * Fixed AIX 64-bit/largefile install problems.
1673 
1674 * Removed FAQ section from netcdf.texi User's Guide, in deference to
1675 online version that can be kept up to date more easily.
1676 
1677 ### 3.6.0-beta5 2004-10-04
1678 
1679 * Fixed assertion violation on 64-bit platforms when size of last fixed
1680 size variable exceeds 2\^32 - 1.
1681 
1682 * Removed another restriction on file size by making record size (derived
1683 from other sizes, not part of the format) an off\_t instead of a
1684 size\_t, when an off\_t is larger than a size\_t. This permits records
1685 to be *much* larger in either classic format or 64-bit-offset format.
1686 
1687 * Incorporated patch from Mathis Rosenhauer to improve performance of
1688 Fortran 90 interface for calls to nf90\_put\_var\_TYPE(),
1689 nf90\_get\_var\_TYPE(), nf90\_put\_vara\_TYPE(), and
1690 nf90\_get\_vara\_TYPE() functions by not emulating them with the
1691 corresponding nf90\_put\_varm\_TYPE() and nf90\_get\_varm\_TYPE() calls.
1692 
1693 * Added tests for invalid offsets in classic format when defining multiple
1694 large variables.
1695 
1696 * Improved installation ease. Have configure script use Large File Support
1697 as a default, if available.
1698 
1699 * Add "extra\_test" as a target for testing Large File Support.
1700 
1701 ### 3.6.0-beta3 2004-08-24
1702 
1703 * Upgraded to recent autoconf, changed configure to (hopefully) improve
1704 installation. Also added macros to deal with large file systems.
1705 
1706 * Added nf\_set\_default\_format to Fortran interface.
1707 
1708 * Added testing to the set\_default\_format functions to nc\_test and
1709 nf\_test.
1710 
1711 * Added documentation to the man page for set\_default\_format functions.
1712 
1713 * Added two new error return codes to C, f77, and f90 interfaces for
1714 invalid dimension size and for bad variable size. Made test for max
1715 dimension size depend on whether 64-bit offsets used. Fixed bug with
1716 dimension sizes between 2\^31 and 2\^32 (for byte variables).
1717 
1718 * Fixed ncdump to properly print dimensions larger than 2\^31.
1719 
1720 * Fixed ncgen to properly handle dimensions between 2\^31 and 2\^32.
1721 
1722 ### 3.6.0-beta2
1723 
1724 * Added -v2 (version 2 format with 64-bit offsets) option to
1725 ncgen, to specify that generated files or generated C/Fortran code
1726 should create 64-bit offset files. Also added -x option to ncgen to
1727 specify use of no-fill mode for fast creation of large files.
1728 
1729 * Added function to set default create mode to C interface
1730 (nc\_set\_default\_create).
1731 
1732 * Added win32 directory, with NET subdirectory to hold .NET port of
1733 netCDF. To use, open netcdf.sln with Visual Studio, and do a clean and
1734 then a build of either the debug or release builds. Tests will be run as
1735 part of the build process. VC++ with managed extensions is required
1736 (i.e. VC++.NET).
1737 
1738 * Added windows installer files to build windows binary installs.
1739 
1740 ### 3.6.0-beta1
1741 
1742 * By incorporating Greg Sjaardema's patch, added support for
1743 64-bit offset files, which remove many of the restrictions relating to
1744 very large files (i.e. larger than 2 GB.) This introduces a new data
1745 format for the first time since the original netCDF format was
1746 introduced. Files in this new 64-bit offset format can't be read by
1747 earlier versions of netCDF. Users should continue to use the netCDF
1748 classic format unless they need to create very large files.
1749 
1750 * The test suite, nc\_test, will now be run twice, once for netCDF classic
1751 format testing, and once for 64-bit offset format testing.
1752 
1753 * The implementation of the Fortran-77 interface has been adapted to
1754 version 4.3 of Burkhard Burow's "cfortran.h".
1755 
1756 ### 3.6.0-alpha
1757 
1758 * Added NEC SX specific optimization for NFILL tunable
1759 parameter in libsrc/putget.c
1760 
1761 Added support for the ifc Fortran-90 compiler creating files "netcdf.d"
1762 and "typesizes.d" (instead of ".mod" files).
1763 
1764 * Fixed access to iargc and getarg functions from Fortran-90 for NAG f90
1765 compiler, contributed by Harald Anlauf.
1766 
1767 ## 3.5.1 2004-02-03
1768 
1769 * Updated INSTALL.html for Mac OS X (Darwin).
1770 
1771 * Made the installation of the netCDF Fortran-90 module file more robust
1772 regarding the name of the file.
1773 
1774 * Added support for eight-byte integers in Fortran90 interface.
1775 
1776 * Increased advisory limits in C netcdf.h and Fortran netcdf.inc for
1777 maximum number of dimensions, variables, and attributes.
1778 
1779 * Changed C++ declarations "friend NcFile" to "friend class NcFile" in
1780 cxx/netcdfcpp.h to conform to standard.
1781 
1782 * Added Dan Schmitt's backward compatible extension to the C++ record
1783 interface to work with arbitrary dimension slices.
1784 
1785 * Added C++ documentation note that caller is responsible for deleting
1786 pointer returned by Variable::values() method when no longer needed.
1787 
1788 * Made C++ interface more standard; the result may not compile on some old
1789 pre-standard C++ compilers.
1790 
1791 * Fixed bug in ncgen when parsing values of a multidimensional char
1792 variable that resulted in failure to pad a value with nulls on IRIX.
1793 
1794 * Fixed ncdump bug adding extra quote to char variable data when using -fc
1795 or -ff option.
1796 
1797 * Fixed so compiling with -DNO\_NETCDF\_2 will work for building without
1798 backward-compatibility netCDF-2 interfaces.
1799 
1800 * Eliminated use of ftruncate(), because it fails on FAT32 file systems
1801 under Linux.
1802 
1803 * Initialized a pointer in putget.m4 (used to generate putget.c) that was
1804 involved in uninitialized memory references when nc\_test is run under
1805 Purify. Two users had reported seeing crashes resulting from this
1806 problem in their applications.
1807 
1808 * Reverted pointer initializations in putget.m4, after testing revealed
1809 these caused a performance problem, resulting in many extra calls to
1810 px\_pgin and px\_pgout when running nc\_test.
1811 
1812 * Added checking of size of "dimids" vector in function
1813 nf90\_inquire\_variable(...) and error-returning if it isn't
1814 sufficiently capacious.
1815 
1816 * Added variable index to ncvarget() and ncattinq() error messages and
1817 attribute name to ncattinq() error message.
1818 
1819 * Tweaked configure script to work with recent C++ compilers.
1820 
1821 * Fixed a memory leak in C++ interface, making sure NcVar::cur\_rec[] gets
1822 deleted in NcVar destructor.
1823 
1824 * Reimplemented nc\_sync() fix of version 3.5.0 to eliminate performance
1825 penalty when synchronization is unnecessary.
1826 
1827 * Changed order of targets in Makefile to build Fortran interface last, as
1828 a workaround for problem with make on AIX platforms.
1829 
1830 ## 3.5.0 2001-03-23
1831 
1832 * Added Fortran 90 interface.
1833 
1834 * Changed C macro TIMELEN in file cxx/nctst.cpp to TIMESTRINGLEN to avoid
1835 clash with macro defined on AIX systems in /usr/include/time.h.
1836 
1837 * Fixed miswriting of netCDF header when exiting define mode. Because the
1838 header was always written correctly later, this was only a problem if
1839 there was another reader of the netCDF file.
1840 
1841 * Fixed explicit synchronizing between netCDF writer and readers via the
1842 nc\_sync(), nf\_sync(), and ncsync() functions.
1843 
1844 * Fixed a number of bugs related to attempts to support shrinking the
1845 header in netCDF files when attributes are rewritten or deleted. Also
1846 fixed the problem that nc\_\_endef() did not work as intended in
1847 reserving extra space in the file header, since the extra space would be
1848 compacted again on calling nc\_close().
1849 
1850 * Fixed the "redef bug" that occurred when nc\_enddef() or nf\_enddef() is
1851 called after nc\_redef() or nf\_redef(), the file is growing such that
1852 the new beginning of a record variable is in the next "chunk", and the
1853 size of at least one record variable exceeds the chunk size (see
1854 netcdf.3 man page for a description of this tuning parameter and how to
1855 set it). This bug resulted in corruption of some values in other
1856 variables than the one being added.
1857 
1858 * The "\*\*" tuning functions for the Fortran interface, nf\*\*create,
1859 nf\*\*open, and nf\*\*enddef, are now documented in the Fortran interface
1860 man pages.
1861 
1862 * Add an 'uninstall' target to all the Makefiles. Dave Glowacki
1863 <dglo@SSEC.WISC.EDU> 199810011851.MAA27335
1864 
1865 * Added support for multiprocessing on Cray T3E. Hooks added by Glenn, but
1866 the majority of the work was done at NERSC. Also includes changes to
1867 ffio option specification. Patch rollup provided by R. K. Owen
1868 <rkowen@Nersc.GOV>. The following functions are added to the public
1869 interface. nc**create\_mp() nc**open\_mp() nc\_set\_base\_pe()
1870 nc\_inq\_base\_pe()
1871 
1872 * Fixed makefile URL for Win32 systems in INSTALL file.
1873 
1874 * Made test for UNICOS system in the configure script case independent.
1875 
1876 * Ported to the following systems: AIX 4.3 (both /bin/xlc and
1877 /usr/vac/bin/xlc compilers) IRIX 6.5 IRIX64 6.5
1878 
1879 * Changed the extension of C++ files from ".cc" to ".cpp". Renamed the C++
1880 interface header file "netcdfcpp.h" instead of "netcdf.hh", changing
1881 "netcdf.hh" to include "netcdfcpp.h" for backward compatibility.
1882 
1883 * Treat "FreeBSD" systems the same as "BSD/OS" system w.r.t. Fortran and
1884 "whatis" database.
1885 
1886 * Corrected manual pages: corrected spelling of "enddef" (was "endef") and
1887 ensured that the words "index" and "format" will be correctly printed.
1888 
1889 * Updated support for Fortran-calling-C interface by updating
1890 "fortran/cfortran.h" from version 3.9 to version 4.1. This new version
1891 supports the Portland Group Fortran compiler (C macro "pgiFortran") and
1892 the Absoft Pro Fortran compiler (C macro "AbsoftProFortran").
1893 
1894 * Corrected use of non-integral-constant-expression in specifying size of
1895 temporary arrays in file "libsrc/ncx\_cray.c".
1896 
1897 * Added Compaq Alpha Linux workstation example to INSTALL file.
1898 
1899 * Ported cfortran.h to Cygnus GNU Win32 C compiler (gcc for Windows).
1900 
1901 * Fixed bug in ncdump using same CDL header name when called with multiple
1902 files.
1903 
1904 * Added new NULL data type NC\_NAT (Not A Type) to facilitate checking
1905 whether a variable object has had its type defined yet, for example when
1906 working with packed values.
1907 
1908 * Fixed use of compile-time macro NO\_NETCDF\_2 so it really doesn't
1909 include old netCDF-2 interfaces, as intended.
1910 
1911 * Ported to MacOS X Public Beta (Darwin 1.2/PowerPC).
1912 
1913 * Fixed C++ friend declarations to conform to C++ standard.
1914 
1915 * Changed INSTALL file to INSTALL.html instead.
1916 
1917 ## 3.4 1998-03-09
1918 
1919 * Fixed ncx\_cray.c to work on all CRAY systems, not just CRAY1. Reworked
1920 USE\_IEG, which was incorrect. Reworked short support. Now USE\_IEG and
1921 otherwise both pass t\_ncx.
1922 
1923 * To better support parallel systems, static and malloc'ed scratch areas
1924 which were shared in the library were eliminated. These were made
1925 private and on the stack where possible. To support this, the macros
1926 ALLOC\_ONSTACK and FREE\_ONSTACK are defined in onstack.h.
1927 
1928 * The buffered i/o system implementation in posixio.c was reimplemented to
1929 limit the number and size of read() or write() system calls and use
1930 greater reliance on memory to memory copy. This saves a great deal of
1931 wall clock time on slow (NFS) filesystems, especially during
1932 nc\_endef().
1933 
1934 * Added performance tuning "underbar underbar" interfaces nc**open(),
1935 nc**create(), and nc\_\_enddef().
1936 
1937 * The 'sizehint' contract between the higher layers and the ncio layer is
1938 consistently enforced.
1939 
1940 * The C++ interface has been updated so that the deprecated "nclong"
1941 typedef should no longer be required, and casts to nclong no longer
1942 necessary. Just use int or long as appropriate. nclong is still
1943 supported for backwards compatibility.
1944 
1945 * The ncdump utility now displays byte values as signed, even on platforms
1946 where the type corresponding to a C char is unsigned (SGI, for example).
1947 Also the ncdump and ncgen utilities have been updated to display and
1948 accept byte attributes as signed numeric values (with a "b" suffix)
1949 instead of using character constants.
1950 
1951 * In libsrc/error.c:nc\_strerror(int), explain that NC\_EBADTYPE applies
1952 to "\_FillValue type mismatch".
1953 
1954 * Some changes to configure scripts (aclocal.m4), macros.make.in and
1955 ncgen/Makefile to support NEC SUPER-UX 7.2.
1956 
1957 * The "usage" messages of ncgen and ncdump include the string returned
1958 from nc\_inq\_libvers().
1959 
1960 * Corrected some casts in the library so that all phases of the arithmetic
1961 computing file offsets occurs with "off\_t" type. This allows certain
1962 larger netcdf files to be created and read on systems with larger
1963 (64bit) off\_t.
1964 
1965 * In ncgen, multidimensional character variables are now padded to the
1966 length of last dimension, instead of just concatenating them. This
1967 restores an undocumented but convenient feature of ncgen under netCDF-2.
1968 Also, a syntax error is now reliably reported if the netcdf name is
1969 omitted in CDL input.
1970 
1971 * Fortran and C code generated by ncgen for netCDF components whose names
1972 contain "-" characters will now compile and run correctly instead of
1973 causing syntax errors.
1974 
1975 * The library allows "." characters in names as well as "\_" and "-"
1976 characters. A zero length name "" is explicitly not allowed. The ncgen
1977 utility will now permit "." characters in CDL names as well.
1978 
1979 * Memory leaks in the C++ interface NcVar::as\_\*() member functions and
1980 NcFile::add\_var() member function are fixed. The documentation was
1981 fixed where it indicated incorrectly that the library managed value
1982 blocks that the user is actually responsible for deleting.
1983 
1984 * he values of the version 2 Fortran error codes have been modified to
1985 make the version 2 Fortran interface more backward compatible at the
1986 source level.
1987 
1988 * Added support for systems whose Fortran INTEGER*1 and INTEGER*2 types
1989 are equivalent to the C "long" type but whose C "int" and "long" types
1990 differ. An example of such a system is the NEC SX-4 with the "-ew"
1991 option to the f90 compiler (sheesh, what a system!).
1992 
1993 * Fixed Version 2 Fortran compatibility bug: NCVGTG, NCVGGC, NCVPTG, and
1994 NCVPGC didn't work according to the Version 2 documentation if the
1995 innermost mapping value (i.e. IMAP[1]) was zero (indicating that the
1996 netCDF structure of the variable should be used).
1997 
1998 ## 3.3.1 1997-06-16
1999 
2000 * One can now inquire about the number of attributes that a variable has
2001 using the global variable ID.
2002 
2003 * The FORTRAN interface should now work on more systems. In particular:
2004 
2005 * It should now work with FORTRAN compilers whose "integer*1" datatype is
2006 either a C "signed char", "short", or "int" and whose "integer*2"
2007 datatype is either a C "short" or "int".
2008 
2009 * It should now work with FORTRAN compilers that are extremely picky about
2010 source code formatting (e.g. the NAG f90 compiler).
2011 
2012 * The dependency on the non-POSIX utility m4(1) for generating the C and
2013 FORTRAN manual pages has been eliminated.
2014 
2015 * EXTERNAL statements have been added to the FORTRAN include-file
2016 "netcdf.inc" to eliminate excessive warnings about "unused" variables
2017 (which were actually functions) by some compilers (e.g. SunOS 4.1.3's
2018 f77(1) version 1.x).
2019 
2020 * Building the netCDF-3 package no longer requires the existence of the
2021 Standard C macro RAND\_MAX.
2022 
2023 * Fixed an ncdump bug resulting in ncdump reporting Attempt to convert
2024 between text & numbers when \_FillValue attribute of a character
2025 variable set to the empty string "".
2026 
2027 * Made ncgen tests more stringent and fixed various bugs this uncovered.
2028 These included bugs in handling byte attributes on platforms on which
2029 char is unsigned, initializing scalar character variables in generated C
2030 code under "-c" option, interspersing DATA statements with declaration
2031 statements in generated Fortran code under "-f" option, handling empty
2032 string as a value correctly in generated C and Fortran, and handling
2033 escape characters in strings. The Fortran output under the "-f" option
2034 was also made less obscure and more portable, using automatic conversion
2035 with netCDF-3 interfaces instead of "BYTE", "INTEGER*1", or "INTEGER*2"
2036 declarations.
2037 
2038 * Fixed a C++ interface problem that prevented compiling the C++ library
2039 with Digital's cxx compiler.
2040 
2041 * Made ncgen "make test" report failure and stop if test resulted in a
2042 failure of generated C or Fortran code.
2043 
2044 * The file that you are now reading was created to contain a high-level
2045 description of the evolution of the netCDF-3 package.
2046 
2047 ## 3.3 1997-05-15
2048 
2049 * The production version of the netCDF-3 package was released.
2050 
2051 * A comparison of the netCDF-2 and netCDF-3 releases can be found in the
2052 file COMPATIBILITY.
2053 
2054 */

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