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# This macro set originally copied from hwloc.
# MPICH modifications:
# - renamed macro to PAC_CHECK_VISIBILITY
# - removed C compiler vendor check
# - sed -e 's/HWLOC/MPICH/gI'
#
# Copyright © 2004-2005 The Trustees of Indiana University and Indiana
# University Research and Technology
# Corporation. All rights reserved.
# Copyright © 2004-2005 The University of Tennessee and The University
# of Tennessee Research Foundation. All rights
# reserved.
# Copyright © 2004-2007 High Performance Computing Center Stuttgart,
# University of Stuttgart. All rights reserved.
# Copyright © 2004-2005 The Regents of the University of California.
# All rights reserved.
# Copyright © 2006-2007 Cisco Systems, Inc. All rights reserved.
# and renamed/modified for hwloc:
# Copyright © 2009 Inria. All rights reserved.
# Copyright © 2009-2010 Université Bordeaux
# Copyright © 2010-2012 Cisco Systems, Inc. All rights reserved.
# See COPYING in top-level directory.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# - Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# - Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer listed
# in this license in the documentation and/or other materials
# provided with the distribution.
#
# - Neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# The copyright holders provide no reassurances that the source code
# provided does not infringe any patent, copyright, or any other
# intellectual property rights of third parties. The copyright holders
# disclaim any liability to any recipient for claims brought against
# recipient by any third party for infringement of that parties
# intellectual property rights.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# PAC_CHECK_VISIBILITY
# --------------------------------------------------------
AC_DEFUN([PAC_CHECK_VISIBILITY],[
# Be safe for systems that have ancient Autoconf's (e.g., RHEL5)
m4_ifdef([AC_PROG_GREP],
[AC_REQUIRE([AC_PROG_GREP])],
[GREP=grep])
# Check if the compiler has support for visibility, like some
# versions of gcc, icc, Sun Studio cc.
AC_ARG_ENABLE(visibility,
AS_HELP_STRING([--enable-visibility],
[enable visibility feature of certain compilers/linkers (default: enabled on platforms that support it)]))
case ${target} in
*-*-aix*|*-*-mingw*|*-*-cygwin*|*-*-hpux*)
enable_visibility=no
;;
esac
mpich_visibility_define=0
mpich_msg="whether to enable symbol visibility"
if test "$enable_visibility" = "no"; then
AC_MSG_CHECKING([$mpich_msg])
AC_MSG_RESULT([no (disabled)])
else
CFLAGS_orig=$CFLAGS
mpich_add=-fvisibility=hidden
CFLAGS="$CFLAGS_orig $mpich_add -Werror"
AC_MSG_CHECKING([if $CC supports $mpich_add])
AC_LINK_IFELSE([AC_LANG_SOURCE([[
#include <stdio.h>
__attribute__((visibility("default"))) int foo;
int main(void) {
fprintf(stderr, "Hello, world\n");
}
]])],
[AS_IF([test -s conftest.err],
[$GREP -iq visibility conftest.err
# If we find "visibility" in the stderr, then
# assume it doesn't work
AS_IF([test "$?" = "0"], [mpich_add=])])
], [mpich_add=])
AS_IF([test "$mpich_add" = ""],
[AC_MSG_RESULT([no])],
[AC_MSG_RESULT([yes])])
CFLAGS=$CFLAGS_orig
VISIBILITY_CFLAGS=$mpich_add
if test "$mpich_add" != "" ; then
mpich_visibility_define=1
AC_MSG_CHECKING([$mpich_msg])
AC_MSG_RESULT([yes (via $mpich_add)])
elif test "$enable_visibility" = "yes"; then
AC_MSG_ERROR([Symbol visibility support requested but compiler does not seem to support it. Aborting])
else
AC_MSG_CHECKING([$mpich_msg])
AC_MSG_RESULT([no (unsupported)])
fi
unset mpich_add
fi
AC_DEFINE_UNQUOTED([HAVE_VISIBILITY], [$mpich_visibility_define],
[Whether C compiler supports symbol visibility or not])
])
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