Hui Zhou
26aa66f0cd
We can't use -Werror with AC_LANG_PROGRAM since it generates code like
int main() {...}
, which triggers the old-style-definition warnings when --enable-strict
is enabled. Use AC_LANG_SOURCE instead.
127 linhas
5.3 KiB
Plaintext
127 linhas
5.3 KiB
Plaintext
# This macro set originally copied from hwloc.
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# MPICH modifications:
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# - renamed macro to PAC_CHECK_VISIBILITY
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# - removed C compiler vendor check
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# - sed -e 's/HWLOC/MPICH/gI'
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#
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# Copyright © 2004-2005 The Trustees of Indiana University and Indiana
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# University Research and Technology
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# Corporation. All rights reserved.
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# Copyright © 2004-2005 The University of Tennessee and The University
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# of Tennessee Research Foundation. All rights
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# reserved.
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# Copyright © 2004-2007 High Performance Computing Center Stuttgart,
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# University of Stuttgart. All rights reserved.
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# Copyright © 2004-2005 The Regents of the University of California.
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# All rights reserved.
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# Copyright © 2006-2007 Cisco Systems, Inc. All rights reserved.
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# and renamed/modified for hwloc:
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# Copyright © 2009 Inria. All rights reserved.
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# Copyright © 2009-2010 Université Bordeaux
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# Copyright © 2010-2012 Cisco Systems, Inc. All rights reserved.
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# See COPYING in top-level directory.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met:
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#
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# - Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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#
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# - Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer listed
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# in this license in the documentation and/or other materials
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# provided with the distribution.
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#
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# - Neither the name of the copyright holders nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# The copyright holders provide no reassurances that the source code
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# provided does not infringe any patent, copyright, or any other
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# intellectual property rights of third parties. The copyright holders
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# disclaim any liability to any recipient for claims brought against
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# recipient by any third party for infringement of that parties
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# intellectual property rights.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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# PAC_CHECK_VISIBILITY
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# --------------------------------------------------------
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AC_DEFUN([PAC_CHECK_VISIBILITY],[
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# Be safe for systems that have ancient Autoconf's (e.g., RHEL5)
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m4_ifdef([AC_PROG_GREP],
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[AC_REQUIRE([AC_PROG_GREP])],
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[GREP=grep])
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# Check if the compiler has support for visibility, like some
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# versions of gcc, icc, Sun Studio cc.
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AC_ARG_ENABLE(visibility,
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AS_HELP_STRING([--enable-visibility],
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[enable visibility feature of certain compilers/linkers (default: enabled on platforms that support it)]))
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case ${target} in
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*-*-aix*|*-*-mingw*|*-*-cygwin*|*-*-hpux*)
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enable_visibility=no
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;;
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esac
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mpich_visibility_define=0
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mpich_msg="whether to enable symbol visibility"
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if test "$enable_visibility" = "no"; then
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AC_MSG_CHECKING([$mpich_msg])
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AC_MSG_RESULT([no (disabled)])
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else
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CFLAGS_orig=$CFLAGS
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mpich_add=-fvisibility=hidden
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CFLAGS="$CFLAGS_orig $mpich_add -Werror"
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AC_MSG_CHECKING([if $CC supports $mpich_add])
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AC_LINK_IFELSE([AC_LANG_SOURCE([[
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#include <stdio.h>
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__attribute__((visibility("default"))) int foo;
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int main(void) {
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fprintf(stderr, "Hello, world\n");
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}
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]])],
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[AS_IF([test -s conftest.err],
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[$GREP -iq visibility conftest.err
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# If we find "visibility" in the stderr, then
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# assume it doesn't work
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AS_IF([test "$?" = "0"], [mpich_add=])])
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], [mpich_add=])
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AS_IF([test "$mpich_add" = ""],
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[AC_MSG_RESULT([no])],
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[AC_MSG_RESULT([yes])])
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CFLAGS=$CFLAGS_orig
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VISIBILITY_CFLAGS=$mpich_add
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if test "$mpich_add" != "" ; then
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mpich_visibility_define=1
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AC_MSG_CHECKING([$mpich_msg])
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AC_MSG_RESULT([yes (via $mpich_add)])
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elif test "$enable_visibility" = "yes"; then
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AC_MSG_ERROR([Symbol visibility support requested but compiler does not seem to support it. Aborting])
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else
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AC_MSG_CHECKING([$mpich_msg])
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AC_MSG_RESULT([no (unsupported)])
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fi
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unset mpich_add
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fi
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AC_DEFINE_UNQUOTED([HAVE_VISIBILITY], [$mpich_visibility_define],
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[Whether C compiler supports symbol visibility or not])
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])
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