[netcdfgroup] NETCDF and NETCDFF cross compiling using mingw-w64

• To: netcdfgroup@xxxxxxxxxxxxxxxx
• Subject: [netcdfgroup] NETCDF and NETCDFF cross compiling using mingw-w64
• From: Karsten Bolding <karsten@xxxxxxxxxxxxxxxxxxxx>
• Date: Tue, 5 Aug 2014 13:48:36 +0200

Hello

I finally managed to get NetCDFF (Fortran) working on Windows using
cross-compilation from Linux using the mingw-w64 suite. I've been using
netcdf-4.3.2 and netcdf-fortran-4.4.0.

On Linux I do:
C:
#!/bin/bash
netcdf_ver=4.3.2
host=i686-w64-mingw32
prefix=$HOME/mingw32-w64/i686
host=x86_64-w64-mingw32
prefix=$HOME/mingw32-w64/x86_64
CC=$host-gcc
module purge
cc_ver=`$CC -dumpversion`
make distclean
./configure  --prefix=$prefix --host=$host --disable-netcdf-4 --disable-dap
--enable-dll

Fortran:
#!/bin/bash
netcdf_ver=4.3.2
netcdff_ver=4.4.0
host=i686-w64-mingw32
prefix=$HOME/mingw32-w64/i686
host=x86_64-w64-mingw32
prefix=$HOME/mingw32-w64/x86_64
CC=$host-gcc
FC=$host-gfortran
module purge
fc_ver=`$FC -dumpversion`
make distclean
FCFLAGS=-ffree-line-length-none CPPFLAGS=-I$prefix/include ./configure
 --prefix
=$prefix --host=$host --enable-dll
make && make install

That could be tidied up a bit - I know.

I copy $prefix/{include,lib} to the Windows machine and add configuration
about NETCDF include dir and NETCDF libraries to my projects
CMakeLists.txt. Do a configuration and generation of Mingw make files and
compile - and it works :-).

Karsten

PS: The only issue I realize is that I have to comment out lines 8-24
in fortran/netcdf_overloads.f90 for Mingw to compile. Funny enough I don't
have the same problem using native gcc and gfortran (also version 4.9).
I've added FCFLAGS=-ffree-line-length-none - but it does not really help.
If I remove a couple of lines from each of the interfaces it also works -
which got me on the line length track.