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====== Building NetCDF, HDF4 and HDF5 on Windows ======

There are binaries available, and they're probably fine, but the headers are not, because HDF4 / HDF5 install different headers depending on which compiler they were built with (which in itself is a bug).  Luckily, building them from source is fairly easy.

Yeah, right.  Actually, [[windows:building:hdf4|HDF4]] is a nightmare, so we've left it out.

===== NetCDF =====

First, get the latest source (currently 4.0.1) from http://www.unidata.ucar.edu/software/netcdf/ and extract it in a convenient place, then configure, build and install:

  $ LDFLAGS=-L/c/met.no/lib CPPFLAGS=-I/c/met.no/include ./configure --prefix=/c/met.no --disable-f90 --disable-examples
  $ make all install
  $ cp COPYRIGHT /c/met.no/copyright/netcdf.txt

<del>Note the ''%%--enable-shared%%'' part; you can leave out ''%%--disable-f90%%'' and ''%%--disable-examples%%'' if you want, but keep ''%%--enable-shared%%''.</del>

===== HDF5 =====

First, get the latest source (currently 1.8.3) from http://www.hdfgroup.org/HDF5/release/obtain5.html and extract it in a convenient place.

In HDF5 1.8.3, there are several issues we need to address before we can build the library.

//note: the first two issues have been reported to the HDF Group and will be fixed in the next release.//

The first is a bug in ''perform/sio_engine.c'': on line 376, replace ''mkdir'' with ''HDmkdir''.

The second is that the test scripts use Winsock (''ws2_32.lib''), but don't link against it.  This can be fixed by running the following commands before ''configure'':

  $ echo 'libh5test_la_LIBADD=-lws2_32' >>test/Makefile.am

The third is that several HDF5 libraries have a dependency on ''libhdf5'', but libtool isn't told about this.  This can be fixed in the same manner as the ''ws2_32'' issue:

  $ echo 'libhdf5_cpp_la_LIBADD=$(LIBHDF5)' >>c++/src/Makefile.am
  $ echo 'libhdf5_hl_la_LIBADD=$(LIBHDF5)' >>hl/src/Makefile.am
  $ echo 'libhdf5_hl_cpp_la_LIBADD=$(LIBH5_HL)' >>hl/c++/src/Makefile.am

Finally, HDF5's ''configure.in'' uses the ''LT_INIT'' macro, which only works with very recent versions of automake.  Edit ''configure.in'' and replace these two lines:

  LT_PREREQ([2.2])
  LT_INIT([dlopen])

with this:

  AC_LIBTOOL_DLOPEN
  AM_PROG_LIBTOOL

**XXX** alternative: use more recent [[windows:building:autotools|autotools]] versions, but this has repercussions for all other components

Now we need to regenerate everything:

  $ aclocal
  $ libtoolize --copy --force
  $ autoheader
  $ automake --add-missing --copy --foreign
  $ autoconf

The fourth and final issue is that C++ support is not enabled by default.  To enable it, add ''--enable-cxx'' to the ''configure'' command line.

Finally:

  $ LDFLAGS=-L/c/met.no/lib CPPFLAGS=-I/c/met.no/include ./configure --prefix=/c/met.no --enable-cxx
  $ make all install
  $ cp COPYING /c/met.no/copyright/hdf5.txt

**TODO** fix large file support!