Hi Bruno, * Ralf Wildenhues wrote on Sun, Feb 20, 2011 at 06:56:49PM CET: > Bruno, OK to merge to gnulib as below, in Christian's name?
A friendly ping! Thanks, Ralf > 2011-02-20 Christian Rössel <...> (tiny change) > Markus Geimer <...> (tiny change) > > Fix OpenMP flag detection for various Fortran compilers. > * m4/openmp.m4 (_AC_LANG_OPENMP(Fortran 77)): Use '!$' > OpenMP-conditional compilation construct, to force compile > failure with missing OpenMP flag. > (AC_OPENMP): Add flags for Cray CCE and NEC SX compilers. > > diff --git a/m4/openmp.m4 b/m4/openmp.m4 > index f2424df..cedfb4c 100644 > --- a/m4/openmp.m4 > +++ b/m4/openmp.m4 > @@ -1,4 +1,4 @@ > -# openmp.m4 serial 7 > +# openmp.m4 serial 8 > dnl Copyright (C) 2006-2011 Free Software Foundation, Inc. > dnl This file is free software; the Free Software Foundation > dnl gives unlimited permission to copy and/or distribute it, > @@ -35,7 +35,14 @@ m4_copy([_AC_LANG_OPENMP(C)], [_AC_LANG_OPENMP(C++)]) > # _AC_LANG_OPENMP(Fortran 77) > # --------------------------- > m4_define([_AC_LANG_OPENMP(Fortran 77)], > -[AC_LANG_FUNC_LINK_TRY([omp_get_num_threads])]) > +[ > + program main > + implicit none > +!$ integer tid > + tid = 42 > + call omp_set_num_threads(2) > + end > +]) > > # _AC_LANG_OPENMP(Fortran) > # --------------------------- > @@ -70,12 +77,14 @@ AC_DEFUN([AC_OPENMP], > dnl SGI C, PGI C -mp > dnl Tru64 Compaq C -omp > dnl IBM C (AIX, Linux) -qsmp=omp > + dnl Cray CCE -homp > + dnl NEC SX -Popenmp > dnl If in this loop a compiler is passed an option that it doesn't > dnl understand or that it misinterprets, the AC_LINK_IFELSE test > dnl will fail (since we know that it failed without the option), > dnl therefore the loop will continue searching for an option, and > dnl no output file called 'penmp' or 'mp' is created. > - for ac_option in -fopenmp -xopenmp -openmp -mp -omp -qsmp=omp; do > + for ac_option in -fopenmp -xopenmp -openmp -mp -omp -qsmp=omp > -homp -Popenmp; do > ac_save_[]_AC_LANG_PREFIX[]FLAGS=$[]_AC_LANG_PREFIX[]FLAGS > _AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $ac_option" > AC_LINK_IFELSE([_AC_LANG_OPENMP], >
