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Autoconf Macro: ax_openmp
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<h1>
ax_openmp
</h1>
<h2>
SYNOPSIS
</h2>
<p class="indent" style="white-space:nowrap;">
<code>AX_OPENMP([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])</code>
</p>
<h2>
DESCRIPTION
</h2>
<div class="indent">
<p>
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
<a href="http://www-unix.mcs/">http://www-unix.mcs/</a>)
</p>
<p>
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.
</p>
<p>
NOTE: You are assumed to not only compile your program with these flags,
but also link it with them as well.
</p>
<p>
If you want to compile everything with OpenMP, you should set:
</p>
<pre>
CFLAGS="$CFLAGS $OPENMP_CFLAGS"
#OR# CXXFLAGS="$CXXFLAGS $OPENMP_CXXFLAGS"
#OR# FFLAGS="$FFLAGS $OPENMP_FFLAGS"
</pre>
<p>
(depending on the selected language).
</p>
<p>
The user can override the default choice by setting the corresponding
environment variable (e.g. OPENMP_CFLAGS).
</p>
<p>
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.
</p>
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<h2>
SOURCE CODE
</h2>
<p class="indent">
<a href=
"http://autoconf-archive.cryp.to/ax_openmp.m4">http://autoconf-archive.cryp.to/ax_openmp.m4</a>
</p>
<h2>
LICENSE
</h2>
<div class="indent">
<p style="white-space:nowrap;">
Copyright © 2008 Steven G. Johnson <stevenj@alum.mit.edu>
</p>
<p>
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.
</p>
<p>
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.
</p>
<p>
You should have received a copy of the GNU General Public License along
with this program. If not, see <<a href=
"http://www.gnu.org/licenses/">http://www.gnu.org/licenses/</a>>.
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