[Patch, Fortran, 4.7] PR 18918 - Add initial support for a coarray communication library

[Steve Kargl]

On Sat, Mar 19, 2011 at 05:23:17PM +0100, Tobias Burnus wrote:
> 
> My idea is to place those library into libgfortran/caf. The user has to 
> compile them themselves and link it then to their "gfortran 
> -fcoarray=lib" compiled program. (Cf. 
> http://gcc.gnu.org/ml/fortran/2011-03/msg00003.html).

See below at [1].
 
> Build and regtested on x86-64-linux.
> (a) Is the patch OK for the 4.7 trunk?
> (b) Are the libgfortrancaf.h, libgfortrancaf_mpi.c and 
> libgfortrancaf_single.c OK for inclusion at libgfortran/caf?
> 

Just a comment on names.  Since you are planning to install
these in libgfortran/caf, please shorten the file names to
caf.h, caf_mpi.c, and caf_single.c.  Consider this a friendly
RSI prevention measure.

[1] I don't understand what you mean by the above.  Are you saying that
gcc would install caf.h, caf_mpi.c, etc in say
lib/gcc/i386-unknown-freebsd9.0/4.7.0/libgfortran
and a user would need to do

gfortran -fcoarray=mpi file.f90 ${PATH}/lib/gcc/i386-unknown-freebsd9.0/4.7.0/libgfortran/caf_mpi.c

to compile her code to use coarrays?

-- 
Steve