![[tokkee]](http://tokkee.org/images/avatar.png){kind=avatar}
diff --git a/acinclude.m4 b/acinclude.m4
index 5cd65aea0b5bd49f99d7d826fbd37b993ec682da..b730d0d607dce10d0310c0cf0379e5fb1de74178 100644 (file)
--- a/acinclude.m4
+++ b/acinclude.m4
fi
])
+# ===========================================================================
+# http://autoconf-archive.cryp.to/ax_openmp.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+# AX_OPENMP([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
+#
+# DESCRIPTION
+#
+# This macro tries to find out how to compile programs that use OpenMP a
+# standard API and set of compiler directives for parallel programming
+# (see http://www-unix.mcs/)
+#
+# On success, it sets the OPENMP_CFLAGS/OPENMP_CXXFLAGS/OPENMP_F77FLAGS
+# output variable to the flag (e.g. -omp) used both to compile *and* link
+# OpenMP programs in the current language.
+#
+# NOTE: You are assumed to not only compile your program with these flags,
+# but also link it with them as well.
+#
+# If you want to compile everything with OpenMP, you should set:
+#
+# CFLAGS="$CFLAGS $OPENMP_CFLAGS"
+# #OR# CXXFLAGS="$CXXFLAGS $OPENMP_CXXFLAGS"
+# #OR# FFLAGS="$FFLAGS $OPENMP_FFLAGS"
+#
+# (depending on the selected language).
+#
+# The user can override the default choice by setting the corresponding
+# environment variable (e.g. OPENMP_CFLAGS).
+#
+# ACTION-IF-FOUND is a list of shell commands to run if an OpenMP flag is
+# found, and ACTION-IF-NOT-FOUND is a list of commands to run it if it is
+# not found. If ACTION-IF-FOUND is not specified, the default action will
+# define HAVE_OPENMP.
+#
+# LAST MODIFICATION
+#
+# 2008-04-12
+#
+# COPYLEFT
+#
+# Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
+#
+# 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
+# Free Software Foundation, either version 3 of the License, or (at your
+# option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+# 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/>.
+#
+# As a special exception, the respective Autoconf Macro's copyright owner
+# gives unlimited permission to copy, distribute and modify the configure
+# scripts that are the output of Autoconf when processing the Macro. You
+# need not follow the terms of the GNU General Public License when using
+# or distributing such scripts, even though portions of the text of the
+# Macro appear in them. The GNU General Public License (GPL) does govern
+# all other use of the material that constitutes the Autoconf Macro.
+#
+# This special exception to the GPL applies to versions of the Autoconf
+# Macro released by the Autoconf Macro Archive. When you make and
+# distribute a modified version of the Autoconf Macro, you may extend this
+# special exception to the GPL to apply to your modified version as well.
+
+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
+])dnl AX_OPENMP