110 строки
4.4 KiB
Bash
110 строки
4.4 KiB
Bash
# -*- shell-script -*-
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#
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# Copyright (c) 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 (c) 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 (c) 2004-2007 High Performance Computing Center Stuttgart,
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# University of Stuttgart. All rights reserved.
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# Copyright (c) 2004-2005 The Regents of the University of California.
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# All rights reserved.
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# Copyright (c) 2006-2010 Cisco Systems, Inc. All rights reserved.
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# Copyright (c) 2009 Sun Microsystems, Inc. All rights reserved.
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# $COPYRIGHT$
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#
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# Additional copyrights may follow
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#
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# $HEADER$
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#
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# OPAL_CHECK_VISIBILITY
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# --------------------------------------------------------
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AC_DEFUN([OPAL_CHECK_VISIBILITY],[
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AC_REQUIRE([AC_PROG_GREP])
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msg="whether to enable symbol visibility"
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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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AC_HELP_STRING([--enable-visibility],
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[enable visibility feature of certain compilers/linkers (default: enabled)]))
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if test "$enable_visibility" = "no"; then
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AC_MSG_CHECKING([$msg])
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AC_MSG_RESULT([no (disabled)])
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have_visibility=0
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else
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CFLAGS_orig="$CFLAGS"
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add=
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# check using gcc -fvisibility=hidden flag
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CFLAGS="$CFLAGS_orig -fvisibility=hidden"
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AC_CACHE_CHECK([if $CC supports -fvisibility],
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[opal_cv_cc_fvisibility],
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[AC_LINK_IFELSE([AC_LANG_PROGRAM([[
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__attribute__((visibility("default"))) int foo;
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]],[[int i;]])],
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[opal_cv_cc_fvisibility=yes],
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[if test -s conftest.err ; then
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$GREP -iq "visibility" conftest.err
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if test "$?" = "0" ; then
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opal_cv_cc_fvisibility=no
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else
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opal_cv_cc_fvisibility=yes
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fi
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else
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opal_cv_cc_fvisibility=yes
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fi],
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[opal_cv_cc_fvisibility=no])
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])
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if test "$ompi_c_vendor" = "sun" ; then
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# Check using Sun Studio -xldscope=hidden flag
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CFLAGS="$CFLAGS_orig -xldscope=hidden"
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AC_CACHE_CHECK([if $CC supports -xldscope],
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[opal_cv_cc_xldscope],
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[AC_LINK_IFELSE([AC_LANG_PROGRAM([[
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__attribute__((visibility("default"))) int foo;
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]],[[int i;]])],
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[opal_cv_cc_fvisibilty=yes],
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[if test -s conftest.err ; then
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$GREP -iq "visibility" conftest.err
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if test "$?" = "0" ; then
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opal_cv_cc_xldscope="no"
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else
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opal_cv_cc_xldscope="yes"
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fi
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else
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opal_cv_cc_xldscope="yes"
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fi],
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[opal_cv_cc_xldscope="no"])
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])
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fi
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if test "$opal_cv_cc_fvisibility" = "yes" ; then
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add=" -fvisibility=hidden"
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have_visibility=1
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AC_MSG_CHECKING([$msg])
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AC_MSG_RESULT([yes (via$add)])
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AC_MSG_WARN([$add has been added to CFLAGS])
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elif test "$opal_cv_cc_xldscope" = "yes" ; then
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add=" -xldscope=hidden"
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have_visibility=1
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AC_MSG_CHECKING([$msg])
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AC_MSG_RESULT([yes (via$add)])
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AC_MSG_WARN([$add has been added to CFLAGS])
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elif test "$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([$msg])
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AC_MSG_RESULT([no (unsupported)])
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have_visibility=0
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fi
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CFLAGS="$CFLAGS_orig$add"
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OPAL_VISIBILITY_CFLAGS="$add"
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unset add
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fi
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AC_DEFINE_UNQUOTED([OPAL_C_HAVE_VISIBILITY], [$have_visibility],
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[Whether C compiler supports -fvisibility])
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])
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