# -*- shell-script -*- # # Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana # University Research and Technology # Corporation. All rights reserved. # Copyright (c) 2004-2005 The University of Tennessee and The University # of Tennessee Research Foundation. All rights # reserved. # Copyright (c) 2004-2007 High Performance Computing Center Stuttgart, # University of Stuttgart. All rights reserved. # Copyright (c) 2004-2005 The Regents of the University of California. # All rights reserved. # Copyright (c) 2006-2012 Cisco Systems, Inc. All rights reserved. # Copyright (c) 2009-2011 Oracle and/or its affiliates. All rights reserved. # $COPYRIGHT$ # # Additional copyrights may follow # # $HEADER$ # # OPAL_CHECK_VISIBILITY # -------------------------------------------------------- AC_DEFUN([OPAL_CHECK_VISIBILITY],[ AC_REQUIRE([AC_PROG_GREP]) # Check if the compiler has support for visibility, like some # versions of gcc, icc Sun Studio cc. AC_ARG_ENABLE(visibility, AC_HELP_STRING([--enable-visibility], [enable visibility feature of certain compilers/linkers (default: enabled)])) opal_visibility_define=0 opal_msg="whether to enable symbol visibility" if test "$enable_visibility" = "no"; then AC_MSG_CHECKING([$opal_msg]) AC_MSG_RESULT([no (disabled)]) else CFLAGS_orig=$CFLAGS opal_add= case "$opal_c_vendor" in sun) # Check using Sun Studio -xldscope=hidden flag opal_add=-xldscope=hidden CFLAGS="$OPAL_CFLAGS_BEFORE_PICKY $opal_add -errwarn=%all" ;; *) # Check using -fvisibility=hidden opal_add=-fvisibility=hidden CFLAGS="$OPAL_CFLAGS_BEFORE_PICKY $opal_add -Werror" ;; esac AC_MSG_CHECKING([if $CC supports $opal_add]) AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include __attribute__((visibility("default"))) int foo; ]],[[fprintf(stderr, "Hello, world\n");]])], [AS_IF([test -s conftest.err], [$GREP -iq visibility conftest.err # If we find "visibility" in the stderr, then # assume it doesn't work AS_IF([test "$?" = "0"], [opal_add=])]) ], [opal_add=]) AS_IF([test "$opal_add" = ""], [AC_MSG_RESULT([no])], [AC_MSG_RESULT([yes])]) CFLAGS=$CFLAGS_orig OPAL_VISIBILITY_CFLAGS=$opal_add if test "$opal_add" != "" ; then opal_visibility_define=1 AC_MSG_CHECKING([$opal_msg]) AC_MSG_RESULT([yes (via $opal_add)]) elif test "$enable_visibility" = "yes"; then AC_MSG_ERROR([Symbol visibility support requested but compiler does not seem to support it. Aborting]) else AC_MSG_CHECKING([$opal_msg]) AC_MSG_RESULT([no (unsupported)]) fi unset opal_add fi AC_DEFINE_UNQUOTED([OPAL_C_HAVE_VISIBILITY], [$opal_visibility_define], [Whether C compiler supports symbol visibility or not]) ])