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Update ax_openmp.m4

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Anthony Scemama 2023-09-12 11:22:27 +02:00
parent 85e7592a6a
commit a5139dd66d
1 changed files with 34 additions and 9 deletions
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43
m4/ax_openmp.m4
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@ -1,5 +1,5 @@
# ===========================================================================
# http://www.gnu.org/software/autoconf-archive/ax_openmp.html
# https://www.gnu.org/software/autoconf-archive/ax_openmp.html
# ===========================================================================
#
# SYNOPSIS
@ -38,6 +38,8 @@
# LICENSE
#
# Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
# Copyright (c) 2015 John W. Peterson <jwpeterson@gmail.com>
# Copyright (c) 2016 Nick R. Papior <nickpapior@gmail.com>
#
# This program is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
@ -50,7 +52,7 @@
# Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program. If not, see <http://www.gnu.org/licenses/>.
# with this program. If not, see <https://www.gnu.org/licenses/>.
#
# As a special exception, the respective Autoconf Macro's copyright owner
# gives unlimited permission to copy, distribute and modify the configure
@ -65,16 +67,19 @@
# modified version of the Autoconf Macro, you may extend this special
# exception to the GPL to apply to your modified version as well.
#serial 8
#serial 14
AC_DEFUN([AX_OPENMP], [
AC_PREREQ(2.59) dnl for _AC_LANG_PREFIX
AC_PREREQ([2.69]) dnl for _AC_LANG_PREFIX
AC_CACHE_CHECK([for OpenMP flag of _AC_LANG compiler], ax_cv_[]_AC_LANG_ABBREV[]_openmp, [save[]_AC_LANG_PREFIX[]FLAGS=$[]_AC_LANG_PREFIX[]FLAGS
ax_cv_[]_AC_LANG_ABBREV[]_openmp=unknown
# Flags to try: -fopenmp (gcc), -openmp (icc), -mp (SGI & PGI),
# -xopenmp (Sun), -omp (Tru64), -qsmp=omp (AIX), none
ax_openmp_flags="-fopenmp -openmp -mp -xopenmp -omp -qsmp=omp none"
# Flags to try: -fopenmp (gcc), -mp (SGI & PGI),
# -qopenmp (icc>=15), -openmp (icc),
# -xopenmp (Sun), -omp (Tru64),
# -qsmp=omp (AIX),
# none
ax_openmp_flags="-fopenmp -openmp -qopenmp -mp -xopenmp -omp -qsmp=omp none"
if test "x$OPENMP_[]_AC_LANG_PREFIX[]FLAGS" != x; then
ax_openmp_flags="$OPENMP_[]_AC_LANG_PREFIX[]FLAGS $ax_openmp_flags"
fi
@ -83,8 +88,27 @@ for ax_openmp_flag in $ax_openmp_flags; do
none) []_AC_LANG_PREFIX[]FLAGS=$save[]_AC_LANG_PREFIX[] ;;
*) []_AC_LANG_PREFIX[]FLAGS="$save[]_AC_LANG_PREFIX[]FLAGS $ax_openmp_flag" ;;
esac
AC_TRY_LINK_FUNC(omp_set_num_threads,
[ax_cv_[]_AC_LANG_ABBREV[]_openmp=$ax_openmp_flag; break])
AC_LINK_IFELSE([AC_LANG_SOURCE([[
@%:@include <omp.h>
static void
parallel_fill(int * data, int n)
{
int i;
@%:@pragma omp parallel for
for (i = 0; i < n; ++i)
data[i] = i;
}
int
main(void)
{
int arr[100000];
omp_set_num_threads(2);
parallel_fill(arr, 100000);
return 0;
}
]])],[ax_cv_[]_AC_LANG_ABBREV[]_openmp=$ax_openmp_flag; break],[])
done
[]_AC_LANG_PREFIX[]FLAGS=$save[]_AC_LANG_PREFIX[]FLAGS
])
@ -97,3 +121,4 @@ else
m4_default([$1], [AC_DEFINE(HAVE_OPENMP,1,[Define if OpenMP is enabled])])
fi
])dnl AX_OPENMP