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

Return to the Main Unidata NetCDF page.
Generated on Thu Jan 25 2018 21:06:33 for NetCDF. NetCDF is a Unidata library.