From 20f0f52cec0aac56365f6acef32d9f2a9a9d2539 Mon Sep 17 00:00:00 2001 From: Amar Takhar Date: Thu, 6 Mar 2008 16:49:24 +0000 Subject: [PATCH] Add detection for OpenMP, this isn't hooked up yet but will be later. Originally committed to SVN as r1913. --- acinclude.m4 | 1 + configure.in | 3 ++ m4macros/ax_openmp.m4 | 103 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 107 insertions(+) create mode 100644 m4macros/ax_openmp.m4 diff --git a/acinclude.m4 b/acinclude.m4 index f28d0b805..bd996ef65 100644 --- a/acinclude.m4 +++ b/acinclude.m4 @@ -2,4 +2,5 @@ m4_include([m4macros/ac_flag.m4]) m4_include([m4macros/acx_pthread.m4]) m4_include([m4macros/ax_check_gl.m4]) m4_include([m4macros/ax_lang_compiler_ms.m4]) +m4_include([m4macros/ax_openmp.m4]) m4_include([m4macros/check_gnu_make.m4]) diff --git a/configure.in b/configure.in index d373cbbb7..163069ccc 100644 --- a/configure.in +++ b/configure.in @@ -130,6 +130,9 @@ AC_PREPROC_IFELSE( ], [AC_MSG_RESULT([no])]) +AX_OPENMP([with_openmp="yes"], [with_openmp="no"]) +if test $with_openmp == "yes"; then +fi diff --git a/m4macros/ax_openmp.m4 b/m4macros/ax_openmp.m4 new file mode 100644 index 000000000..cd51ed6de --- /dev/null +++ b/m4macros/ax_openmp.m4 @@ -0,0 +1,103 @@ +##### http://autoconf-archive.cryp.to/ax_openmp.html +# +# SYNOPSIS +# +# AX_OPENMP([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]]) +# +# DESCRIPTION +# +# This macro tries to find out how to compile programs that use +# OpenMP a standard API and set of compiler directives for parallel +# programming (see http://www-unix.mcs/) +# +# On success, it sets the +# OPENMP_CFLAGS/OPENMP_CXXFLAGS/OPENMP_F77FLAGS output variable to +# the flag (e.g. -omp) used both to compile *and* link OpenMP +# programs in the current language. +# +# NOTE: You are assumed to not only compile your program with these +# flags, but also link it with them as well. +# +# If you want to compile everything with OpenMP, you should set: +# +# CFLAGS="$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 +# +# 2007-07-29 +# +# COPYLEFT +# +# Copyright (c) 2007 Steven G. Johnson +# +# 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 +# . +# +# 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