-# openmp.m4 serial 5
-dnl Copyright (C) 2006-2008 Free Software Foundation, Inc.
+# openmp.m4 serial 9
+dnl Copyright (C) 2006-2013 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
# _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)
# ---------------------------
AC_CACHE_CHECK([for $CC option to support OpenMP],
[ac_cv_prog_[]_AC_LANG_ABBREV[]_openmp],
[AC_LINK_IFELSE([_AC_LANG_OPENMP],
- [ac_cv_prog_[]_AC_LANG_ABBREV[]_openmp='none needed'],
- [ac_cv_prog_[]_AC_LANG_ABBREV[]_openmp='unsupported'
- dnl Try these flags:
- dnl GCC >= 4.2 -fopenmp
- dnl SunPRO C -xopenmp
- dnl Intel C -openmp
- dnl SGI C, PGI C -mp
- dnl Tru64 Compaq C -omp
- dnl IBM C (AIX, Linux) -qsmp=omp
- dnl If in this loop a compiler is passed an option that it doesn't
- dnl understand or that it misinterprets, the AC_LINK_IFELSE test
- dnl will fail (since we know that it failed without the option),
- dnl therefore the loop will continue searching for an option, and
- dnl no output file called 'penmp' or 'mp' is created.
- for ac_option in -fopenmp -xopenmp -openmp -mp -omp -qsmp=omp; do
- ac_save_[]_AC_LANG_PREFIX[]FLAGS=$[]_AC_LANG_PREFIX[]FLAGS
- _AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $ac_option"
- AC_LINK_IFELSE([_AC_LANG_OPENMP],
- [ac_cv_prog_[]_AC_LANG_ABBREV[]_openmp=$ac_option])
- _AC_LANG_PREFIX[]FLAGS=$ac_save_[]_AC_LANG_PREFIX[]FLAGS
- if test "$ac_cv_prog_[]_AC_LANG_ABBREV[]_openmp" != unsupported; then
- break
- fi
- done])])
+ [ac_cv_prog_[]_AC_LANG_ABBREV[]_openmp='none needed'],
+ [ac_cv_prog_[]_AC_LANG_ABBREV[]_openmp='unsupported'
+ dnl Try these flags:
+ dnl GCC >= 4.2 -fopenmp
+ dnl SunPRO C -xopenmp
+ dnl Intel C -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 Lahey Fortran (Linux) --openmp
+ 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 -homp \
+ -Popenmp --openmp; do
+ ac_save_[]_AC_LANG_PREFIX[]FLAGS=$[]_AC_LANG_PREFIX[]FLAGS
+ _AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $ac_option"
+ AC_LINK_IFELSE([_AC_LANG_OPENMP],
+ [ac_cv_prog_[]_AC_LANG_ABBREV[]_openmp=$ac_option])
+ _AC_LANG_PREFIX[]FLAGS=$ac_save_[]_AC_LANG_PREFIX[]FLAGS
+ if test "$ac_cv_prog_[]_AC_LANG_ABBREV[]_openmp" != unsupported; then
+ break
+ fi
+ done])])
case $ac_cv_prog_[]_AC_LANG_ABBREV[]_openmp in #(
"none needed" | unsupported)
;; #(