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Gentoo's Bugzilla – Attachment 204915 Details for
Bug 280642
sci-libs/mathgl-1.8.1 request gcc to have been build with openmp
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openmp m4 macro
ax_openmp.m4 (text/plain), 2.81 KB, created by
François Bissey
on 2009-09-22 12:21:32 UTC
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Description:
openmp m4 macro
Filename:
MIME Type:
Creator:
François Bissey
Created:
2009-09-22 12:21:32 UTC
Size:
2.81 KB
patch
obsolete
>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=$ax_cv_[]_AC_LANG_ABBREV[]_openmp > OPENMP_LIBS=" " > if test "x$ax_cv_[]_AC_LANG_ABBREV[]_openmp" = "x-fopenmp"; then > OPENMP_LIBS="-lgomp" > fi > 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
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bug 280642
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200486
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