dnl
dnl Copyright (c) 2004-2009 The Trustees of Indiana University and Indiana
dnl University Research and Technology
dnl Corporation. All rights reserved.
dnl Copyright (c) 2004-2005 The University of Tennessee and The University
dnl of Tennessee Research Foundation. All rights
dnl reserved.
dnl Copyright (c) 2004-2007 High Performance Computing Center Stuttgart,
dnl University of Stuttgart. All rights reserved.
dnl Copyright (c) 2004-2005 The Regents of the University of California.
dnl All rights reserved.
dnl Copyright (c) 2006-2012 Cisco Systems, Inc. All rights reserved.
dnl Copyright (c) 2006-2008 Sun Microsystems, Inc. All rights reserved.
dnl Copyright (c) 2006-2007 Los Alamos National Security, LLC. All rights
dnl reserved.
dnl Copyright (c) 2009 Oak Ridge National Labs. All rights reserved.
dnl $COPYRIGHT$
dnl
dnl Additional copyrights may follow
dnl
dnl $HEADER$
dnl
AC_DEFUN([OPAL_SETUP_LIBLTDL],[
OPAL_VAR_SCOPE_PUSH([HAPPY])
ompi_show_subtitle "GNU libltdl setup"
# AC_CONFIG_SUBDIRS appears to be broken for non-gcc compilers (i.e.,
# passing precious variables down to the sub-configure).
#
# Finally, make ltdl follow the same shared/static convention that was
# user for the main OMPI libraries. So manually examine
# $enable_shared and $enable_static and pass down the corresponding
# flags.
LIBLTDL_SUBDIR=
OPAL_HAVE_LTDL_ADVISE=0
OPAL_LIBLTDL_INTERNAL=0
AS_IF([test "$OPAL_ENABLE_DLOPEN_SUPPORT" = "0"],
[AC_MSG_WARN([libltdl support disabled (by --disable-dlopen)])
LIBLTDL=
LDTLINCL=
OPAL_WRAPPER_FLAGS_ADD(LIBS, "$LIBS")],
[
# Default to building the internal copy. After this,
# paffinity_hwloc_location is guaranteed to be set to one of:
# "internal", a directory name (i.e., whatever the user
# supplied), or "no".
libltdl_location=$with_libltdl
AS_IF([test -z "$libltdl_location" -o "$libltdl_location" = "yes"],
[libltdl_location=internal])
AC_MSG_CHECKING([location of libltdl])
case $libltdl_location in
no)
AC_MSG_WARN([--without-libltdl specified in conjunction with])
AC_MSG_WARN([--enable-dlopen (or --disable-dlopen was not specified)])
AC_MSG_WARN([Cannot have dlopen without libltdl])
AC_MSG_ERROR([Cannot continue])
;;
internal)
AC_MSG_RESULT([internal copy])
_OPAL_SETUP_LIBLTDL_INTERNAL
;;
external)
AC_MSG_RESULT([external copy (unspecified)])
# If we're using an extern libltdl, then reset the
# LTDLINCL that was set earlier (ie., there's no need to
# -I into our internal libltdl tree).
LIBLTDL=
LDTLINCL=
libltdl_location=
libltdl_need_external=1
;;
*)
AC_MSG_RESULT([external copy ($libltdl_location)])
OMPI_CHECK_WITHDIR([libltdl], [$libltdl_location],
[include/ltdl.h])
# If we're using an extern libltdl, then reset the
# LTDLINCL that was set earlier (ie., there's no need to
# -I into our internal libltdl tree).
LIBLTDL=
LDTLINCL=
libltdl_need_external=1
;;
esac
AS_IF([test "$libltdl_need_external" = "1"],
[OMPI_CHECK_PACKAGE([libltdl],
[ltdl.h],
[ltdl],
[lt_dlopen],
[],
[$libltdl_location],
[],
[],
[AC_MSG_WARN([External libltdl installation not found])
AC_MSG_WARN([or not usable.])
AC_MSG_ERROR([Cannot continue.])])
CPPFLAGS="$CPPFLAGS $libltdl_CPPFLAGS"
LDFLAGS="$LDFLAGS $libltdl_LDFLAGS"
LIBS="$LIBS $libltdl_LIBS"
# Check for lt_dladvise_init; warn if we don't have
# it
AC_CHECK_FUNC([lt_dladvise_init],
[OPAL_HAVE_LTDL_ADVISE=1],
[AC_MSG_WARN([*********************************************])
AC_MSG_WARN([Could not find lt_dladvise_init in the])
AC_MSG_WARN([external libltdl installation.])
AC_MSG_WARN([This could mean that your libltdl version])
AC_MSG_WARN([is old. We recommend that you re-configure])
AC_MSG_WARN([Open MPI with --with-libltdl=internal to])
AC_MSG_WARN([use the internal libltdl copy in Open MPI.])
AC_MSG_WARN([])
AC_MSG_WARN([Sleeping 10 seconds to give you a])
AC_MSG_WARN([chance to read this message.])
AC_MSG_WARN([*********************************************])
sleep 10
])
])
])
AC_SUBST(LTDLINCL)
AC_SUBST(LIBLTDL)
AC_SUBST(LIBLTDL_SUBDIR)
AC_DEFINE_UNQUOTED(OPAL_HAVE_LTDL_ADVISE, $OPAL_HAVE_LTDL_ADVISE,
[Whether libltdl appears to have the lt_dladvise interface])
AC_DEFINE_UNQUOTED(OPAL_WANT_LIBLTDL, $OPAL_ENABLE_DLOPEN_SUPPORT,
[Whether to include support for libltdl or not])
AC_DEFINE_UNQUOTED(OPAL_LIBLTDL_INTERNAL, $OPAL_LIBLTDL_INTERNAL,
[Whether we are using the internal libltdl or not])
AM_CONDITIONAL(OPAL_HAVE_DLOPEN,
[test "$OPAL_ENABLE_DLOPEN_SUPPORT" = "1"])
OPAL_VAR_SCOPE_POP([HAPPY])
])dnl
#
# Setup to build the internal copy of libltdl
#
AC_DEFUN([_OPAL_SETUP_LIBLTDL_INTERNAL],[
ompi_subdir_args="$ompi_subdir_args --enable-ltdl-convenience --disable-ltdl-install"
if test "$enable_shared" = "yes"; then
ompi_subdir_args="$ompi_subdir_args --enable-shared"
else
ompi_subdir_args="$ompi_subdir_args --disable-shared"
fi
if test "$enable_static" = "yes"; then
ompi_subdir_args="$ompi_subdir_args --enable-static"
else
ompi_subdir_args="$ompi_subdir_args --disable-static"
fi
CFLAGS_save="$CFLAGS"
CFLAGS="$OMPI_CFLAGS_BEFORE_PICKY $OPAL_VISIBILITY_CFLAGS"
# VPATH support will be included by default in CONFIG_SUBDIR
OMPI_CONFIG_SUBDIR(opal/libltdl, [$ompi_subdir_args],
[HAPPY=1], [HAPPY=0])
if test "$HAPPY" = "1"; then
LIBLTDL_SUBDIR=libltdl
OPAL_LIBLTDL_INTERNAL=1
CPPFLAGS_save="$CPPFLAGS"
CPPFLAGS="-I."
# Must specifically mention $srcdir here for VPATH builds
# (this file is in the src tree).
AC_EGREP_HEADER([lt_dladvise_init], [$srcdir/opal/libltdl/ltdl.h],
[OPAL_HAVE_LTDL_ADVISE=1])
CPPFLAGS="$CPPFLAGS_save"
# Arrgh. This is gross. But I can't think of any other way
# to do it. :-( These files are in the build tree; don't list
# $srcdir here.
flags=`$EGREP ^LIBADD_DL opal/libltdl/Makefile | cut -d= -f2-`
OMPI_CHECK_LINKER_FLAGS([opal/libltdl/libtool],
[-export-dynamic $flags])
OPAL_WRAPPER_FLAGS_ADD([LIBS], [$extra_ldflags])
LDFLAGS="-export-dynamic $LDFLAGS"
else
AC_MSG_WARN([Failed to build GNU libltdl. This usually means that something])
AC_MSG_WARN([is incorrectly setup with your environment. There may be useful information in])
AC_MSG_WARN([opal/libltdl/config.log. You can also disable GNU libltdl, which will disable])
AC_MSG_WARN([dynamic shared object loading, by configuring with --disable-dlopen.])
AC_MSG_ERROR([Cannot continue])
fi
CFLAGS="$CFLAGS_save"
])dnl