dnl Usage: RELAYTOOL(LIBRARY_NAME, LIBS, CFLAGS, ACTION-IF-WEAK-LINK-IS-POSSIBLE)

dnl Example:

dnl RELAYTOOL("gtkspell", GTKSPELL_LIBS, GTKSPELL_CFLAGS, gtkspell_weak=yes)

dnl Will modify GTKSPELL_LIBS to include a call to relaytool if available

dnl or if not, will modify GTKSPELL_CFLAGS to include -D switches to define

dnl libgtkspell_is_present=1 and libgtkspell_symbol_is_present=1

AC_DEFUN([RELAYTOOL], [

if test -z "$RELAYTOOL_PROG"; then

AC_PATH_PROG(RELAYTOOL_PROG, relaytool, no)

fi

AC_MSG_CHECKING(whether we can weak link $1)

_RELAYTOOL_PROCESSED_NAME=`echo "$1" | sed 's/-/_/g;s/\./_/g;'`

_RELAYTOOL_UPPER_NAME=`echo $_RELAYTOOL_PROCESSED_NAME | tr '[[:lower:]]' '[[:upper:]]'`

if test "$RELAYTOOL_PROG" = "no"; then

AC_MSG_RESULT(no)

$3="-DRELAYTOOL_${_RELAYTOOL_UPPER_NAME}='static const int lib${_RELAYTOOL_PROCESSED_NAME}_is_present = 1; static int __attribute__((unused)) lib${_RELAYTOOL_PROCESSED_NAME}_symbol_is_present(char *m) { return 1; }' $$3"

else

AC_MSG_RESULT(yes)

$2=`echo $$2|sed 's/\`/\\\\\`/g;'`

$2="-Wl,--gc-sections \`relaytool --relay $1 $$2\`"

$3="-DRELAYTOOL_${_RELAYTOOL_UPPER_NAME}='extern int lib${_RELAYTOOL_PROCESSED_NAME}_is_present; extern int lib${_RELAYTOOL_PROCESSED_NAME}_symbol_is_present(char *s);' $$3"

$4

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