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Comment:Use Autoconf Archive OpenMP check
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SHA3-256: 494f675279e8a3fc6b90a2b5f9e6538ff861cc7f4bc44def8e38b65faccf0b10
User & Date: rkeene on 2019-01-23 20:33:18
Other Links: manifest | tags
Context
2019-01-23
22:03
Use a better mechanism for checking for functions which require libraries+headers Leaf check-in: 79081a9bf1 user: rkeene tags: trunk
20:33
Use Autoconf Archive OpenMP check check-in: 494f675279 user: rkeene tags: trunk
20:24
Upgraded to latest version of AES to deal with more warnings check-in: 803aa5197b user: rkeene tags: trunk
Changes
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Added aclocal/ax_openmp.m4 version [f2944b4d71]. 





























































































































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# ===========================================================================
#        https://www.gnu.org/software/autoconf-archive/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.
#
# LICENSE
#
#   Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
#   Copyright (c) 2015 John W. Peterson <jwpeterson@gmail.com>
#   Copyright (c) 2016 Nick R. Papior <nickpapior@gmail.com>
#
#   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 <https://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 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.

#serial 13

AC_DEFUN([AX_OPENMP], [
AC_PREREQ([2.69]) 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=$[]_AC_LANG_PREFIX[]FLAGS
ax_cv_[]_AC_LANG_ABBREV[]_openmp=unknown
# Flags to try:  -fopenmp (gcc), -mp (SGI & PGI),
#                -qopenmp (icc>=15), -openmp (icc),
#                -xopenmp (Sun), -omp (Tru64),
#                -qsmp=omp (AIX),
#                none
ax_openmp_flags="-fopenmp -openmp -qopenmp -mp -xopenmp -omp -qsmp=omp none"
if test "x$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_LINK_IFELSE([AC_LANG_SOURCE([[
@%:@include <omp.h>

static void
parallel_fill(int * data, int n)
{
  int i;
@%:@pragma omp parallel for
  for (i = 0; i < n; ++i)
    data[i] = i;
}

int
main()
{
  int arr[100000];
  omp_set_num_threads(2);
  parallel_fill(arr, 100000);
  return 0;
}
]])],[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








Modified autogen.sh
from [6d68802801]
to [a208158f34].




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urls=(
	http://chiselapp.com/user/rkeene/repository/autoconf/doc/trunk/tcl.m4
	http://chiselapp.com/user/rkeene/repository/autoconf/doc/trunk/shobj.m4
	http://chiselapp.com/user/rkeene/repository/autoconf/doc/trunk/versionscript.m4
	'http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=blob_plain;f=m4/ax_check_compile_flag.m4'
	'http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=blob_plain;f=m4/ax_check_link_flag.m4'
	'http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=blob_plain;f=m4/ax_openmp.m4'
)

localFiles=(
)

failed='0'
for command in "${commands[@]}"; do




︙







Modified configure.ac
from [39b7173c74]
to [a03ae74853].




︙


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dnl Enable hardening
AX_CHECK_COMPILE_FLAG([-fstack-protector-all], [CFLAGS="$CFLAGS -fstack-protector-all"])
AX_CHECK_COMPILE_FLAG([-fno-strict-overflow], [CFLAGS="$CFLAGS -fno-strict-overflow"])
AC_DEFINE([_FORTIFY_SOURCE], [2], [Enable fortification])

dnl Enable OpenMP, if available
tcl_nano_openmp=''
AX_CHECK_LINK_FLAG([-fopenmp], [
	tcl_nano_openmp='-fopenmp'
], [
	AX_CHECK_LINK_FLAG([-xopenmp], [
		tcl_nano_openmp='-xopenmp'
	], [
		AX_CHECK_LINK_FLAG([/openmp], [
			tcl_nano_openmp='/openmp'
		])
	])
])

AX_OPENMP([
if test -n "${tcl_nano_openmp}"; then
	CFLAGS="$CFLAGS ${tcl_nano_openmp}"
	CFLAGS="$CFLAGS $OPENMP_CFLAGS"

	AC_DEFINE([NANO_TCL_HAVE_OPENMP], [1], [Define if you have support for OpenMP])
fi
])

dnl Random number generation mechanisms
AC_CHECK_FUNCS(getrandom,, [
	AC_CHECK_FUNCS(getentropy,, [
		AC_CACHE_CHECK([for CryptGenRandom], nanotcl_cv_func_CryptGenRandom, [
			save_LIBS="${LIBS}"
			LIBS="${save_LIBS} -ladvapi32"




︙
















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