b29b852281
config/ directory. We split them apart a while ago in the hopes that
it would simplify things, but it didn't really (e.g., because there
were still some ompi/opal .m4 files in the top-level config/
directory, resulting in developer confusion where any given m4 macro
was defined).
So this commit consolidates them back into the top-level directory for
simplicity.
There's still (at least) two changes that would be nice to make:
1. Split any generated .m4 file (e.g., autogen-generated .m4 files)
into a separate directory somewhere so that a top-level -Iconfig/
will only get our explicitly defined macros, not the autogen stuff
(e.g., with libevent2019 needing to get the visibility macro, but
NOT all the autogen-generated inclusion of component configure.m4
files).
1. Change configure to be of the form:
{{{
# ...a small amount of preamble/setup...
OPAL_SETUP
m4_ifdef([project_orte], [ORTE_SETUP])
m4_ifdef([project_ompi], [OMPI_SETUP])
# ...a small amount of finishing stuff...
}}}
I doubt we'll ever get anything as clean as that, but that would be
the goal to shoot for.
This commit was SVN r27704.
91 строка
3.3 KiB
Bash
91 строка
3.3 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) 2006-2012 Cisco Systems, Inc. All rights reserved.
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# Copyright (c) 2009-2011 Oracle and/or its affiliates. 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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# 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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opal_visibility_define=0
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opal_msg="whether to enable symbol visibility"
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if test "$enable_visibility" = "no"; then
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AC_MSG_CHECKING([$opal_msg])
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AC_MSG_RESULT([no (disabled)])
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else
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CFLAGS_orig=$CFLAGS
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opal_add=
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case "$ompi_c_vendor" in
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sun)
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# Check using Sun Studio -xldscope=hidden flag
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opal_add=-xldscope=hidden
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CFLAGS="$OMPI_CFLAGS_BEFORE_PICKY $opal_add -errwarn=%all"
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;;
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*)
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# Check using -fvisibility=hidden
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opal_add=-fvisibility=hidden
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CFLAGS="$OMPI_CFLAGS_BEFORE_PICKY $opal_add -Werror"
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;;
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esac
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AC_MSG_CHECKING([if $CC supports $opal_add])
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[
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#include <stdio.h>
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__attribute__((visibility("default"))) int foo;
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]],[[fprintf(stderr, "Hello, world\n");]])],
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[AS_IF([test -s conftest.err],
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[$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 "$?" = "0"], [opal_add=])])
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], [opal_add=])
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AS_IF([test "$opal_add" = ""],
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[AC_MSG_RESULT([no])],
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[AC_MSG_RESULT([yes])])
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CFLAGS=$CFLAGS_orig
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OPAL_VISIBILITY_CFLAGS=$opal_add
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if test "$opal_add" != "" ; then
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opal_visibility_define=1
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AC_MSG_CHECKING([$opal_msg])
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AC_MSG_RESULT([yes (via $opal_add)])
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elif test "$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([$opal_msg])
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AC_MSG_RESULT([no (unsupported)])
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fi
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unset opal_add
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fi
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AC_DEFINE_UNQUOTED([OPAL_C_HAVE_VISIBILITY], [$opal_visibility_define],
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[Whether C compiler supports symbol visibility or not])
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])
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