mirror of
https://github.com/tildearrow/furnace.git
synced 2024-11-09 14:25:06 +00:00
67 lines
2.7 KiB
Text
67 lines
2.7 KiB
Text
|
dnl @synopsis AX_OPENMP([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
|
||
|
|
dnl @summary determine how to compile programs using OpenMP
|
||
|
|
dnl @category InstalledPackages
|
||
|
|
dnl
|
||
|
|
dnl This macro tries to find out how to compile programs that
|
||
|
|
dnl use OpenMP, a standard API and set of compiler directives for
|
||
|
|
dnl parallel programming (see http://www.openmp.org/).
|
||
|
|
dnl
|
||
|
|
dnl On success, it sets the OPENMP_CFLAGS/OPENMP_CXXFLAGS/OPENMP_FFLAGS
|
||
|
|
dnl output variable to the flag (e.g. -omp) used both to compile *and* link
|
||
|
|
dnl OpenMP programs in the current language.
|
||
|
|
dnl
|
||
|
|
dnl NOTE: You are assumed to not only compile your program with these
|
||
|
|
dnl flags, but also link it with them as well.
|
||
|
|
dnl
|
||
|
|
dnl If you want to compile everything with OpenMP, you should set:
|
||
|
|
dnl
|
||
|
|
dnl CFLAGS="$CFLAGS $OPENMP_CFLAGS"
|
||
|
|
dnl #OR# CXXFLAGS="$CXXFLAGS $OPENMP_CXXFLAGS"
|
||
|
|
dnl #OR# FFLAGS="$FFLAGS $OPENMP_FFLAGS"
|
||
|
|
dnl
|
||
|
|
dnl (depending on the selected language).
|
||
|
|
dnl
|
||
|
|
dnl The user can override the default choice by setting the corresponding
|
||
|
|
dnl environment variable (e.g. OPENMP_CFLAGS).
|
||
|
|
dnl
|
||
|
|
dnl ACTION-IF-FOUND is a list of shell commands to run if an OpenMP
|
||
|
|
dnl flag is found, and ACTION-IF-NOT-FOUND is a list of commands
|
||
|
|
dnl to run it if it is not found. If ACTION-IF-FOUND is not specified,
|
||
|
|
dnl the default action will define HAVE_OPENMP.
|
||
|
|
dnl
|
||
|
|
dnl @version 2006-11-20
|
||
|
|
dnl @license GPLWithACException
|
||
|
|
dnl @author Steven G. Johnson <stevenj@alum.mit.edu>
|
||
|
|
|
||
|
|
AC_DEFUN([AX_OPENMP], [
|
||
|
|
AC_PREREQ(2.59) dnl for _AC_LANG_PREFIX
|
||
|
|
|
||
|
|
AC_CACHE_CHECK([for OpenMP flag of _AC_LANG compiler], ax_cv_[]_AC_LANG_ABBREV[]_openmp, [save[]_AC_LANG_PREFIX[]FLAGS=$[]_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"
|
||
|
|
if test "x$OPENMP_[]_AC_LANG_PREFIX[]FLAGS" != x; then
|
||
|
|
ax_openmp_flags="$OPENMP_[]_AC_LANG_PREFIX[]FLAGS $ax_openmp_flags"
|
||
|
|
fi
|
||
|
|
for ax_openmp_flag in $ax_openmp_flags; do
|
||
|
|
case $ax_openmp_flag in
|
||
|
|
none) []_AC_LANG_PREFIX[]FLAGS=$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])
|
||
|
|
done
|
||
|
|
[]_AC_LANG_PREFIX[]FLAGS=$save[]_AC_LANG_PREFIX[]FLAGS
|
||
|
|
])
|
||
|
|
if test "x$ax_cv_[]_AC_LANG_ABBREV[]_openmp" = "xunknown"; then
|
||
|
|
m4_default([$2],:)
|
||
|
|
else
|
||
|
|
if test "x$ax_cv_[]_AC_LANG_ABBREV[]_openmp" != "xnone"; then
|
||
|
|
OPENMP_[]_AC_LANG_PREFIX[]FLAGS=$ax_cv_[]_AC_LANG_ABBREV[]_openmp
|
||
|
|
fi
|
||
|
|
m4_default([$1], [AC_DEFINE(HAVE_OPENMP,1,[Define if OpenMP is enabled])])
|
||
|
|
fi
|
||
|
|
AC_SUBST(OPENMP_[]_AC_LANG_PREFIX[]FLAGS)
|
||
|
|
])dnl AX_OPENMP
|