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

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