source: branches/libc-0.6/src/binutils/ltcf-cxx.sh@ 2653

#### This script is meant to be sourced by ltconfig.

# ltcf-cxx.sh - Create a C++ compiler specific configuration
#
# Copyright (C) 1996-1999, 2000, 2001, 2003 Free Software Foundation, Inc.
# Originally by Gordon Matzigkeit <[email protected]>, 1996
#
# Original C++ support by:Gary V. Vaughan <[email protected]>
#    Alexandre Oliva <[email protected]>
#    Ossama Othman <[email protected]>
#    Thomas Thanner <[email protected]>
#
# This file is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# As a special exception to the GNU General Public License, if you
# distribute this file as part of a program that contains a
# configuration script generated by Autoconf, you may include it under
# the same distribution terms that you use for the rest of that program.


# Source file extension for C++ test sources.
ac_ext=cc

# Object file extension for compiled C++ test sources.
objext=o

# Code to be used in simple compile tests
lt_simple_compile_test_code="int some_variable = 0;"

# Code to be used in simple link tests
lt_simple_link_test_code='int main(int, char *[]) { return (0); }'

# C++ compiler
CXX=${CXX-c++}

# ltmain only uses $CC for tagged configurations so make sure $CC is set.
CC=${CC-"$CXX"}
CFLAGS=${CFLAGS-"$CXXFLAGS"}

# Allow CC to be a program name with arguments.
set dummy $CC
compiler=$2
cc_basename=`$echo X"$compiler" | $Xsed -e 's%^.*/%%'`

# Check if we are using GNU gcc  (taken/adapted from configure script)
# We need to check here since "--with-gcc" is set at configure time,
# not ltconfig time!
cat > conftest.$ac_ext <<EOF
#ifdef __GNUC__
  yes;
#endif
EOF
if { ac_try='${CC-c++} -E conftest.$ac_ext'; { (eval echo \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; } | egrep yes >/dev/null 2>&1; then
  with_gcc=yes

  # Set up default GNU C++ configuration

  # Check if GNU C++ uses GNU ld as the underlying linker, since the
  # archiving commands below assume that GNU ld is being used.  The
  # assumption here is that the linker is going to be the same as that
  # used by the C compiler.  For the purposes of GCC, this is ok, but
  # if someone uses g++ along with a non-GNU C compiler that doesn't
  # use GNU ld, we may lose.  This is ok for the toolchain tree, since
  # the only users of ltcf-cxx.sh are libstdc++-v3 and libjava,
  # anyway, and those use both gcc and g++, so the settings are bound
  # to be the same.

  if test "$with_gnu_ld" = yes; then
    archive_cmds='$CC -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $wl$soname -o $lib'
    archive_expsym_cmds='$CC -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib'

    hardcode_libdir_flag_spec='${wl}--rpath ${wl}$libdir'
    export_dynamic_flag_spec='${wl}--export-dynamic'

    # If archive_cmds runs LD, not CC, wlarc should be empty
    # XXX I think wlarc can be eliminated in ltcf-cxx, but I need to
    #     investigate it a little bit more. (MM)
    wlarc='${wl}'

    # ancient GNU ld didn't support --whole-archive et. al.
    if eval "`$CC -print-prog-name=ld` --help 2>&1" | \
        egrep 'no-whole-archive' > /dev/null; then
      whole_archive_flag_spec="$wlarc"'--whole-archive$convenience '"$wlarc"'--no-whole-archive'
    else
      whole_archive_flag_spec=
    fi
  else
    wlarc=

    # A generic and very simple default shared library creation
    # command for GNU C++ for the case where it uses the native
    # linker, instead of GNU ld.  If possible, this setting should
    # overridden to take advantage of the native linker features on
    # the platform it is being used on.
    archive_cmds='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -o $lib'
  fi

  # Commands to make compiler produce verbose output that lists
  # what "hidden" libraries, object files and flags are used when
  # linking a shared library.
  output_verbose_link_cmd='$CC -shared $CFLAGS -v conftest.$objext 2>&1 | egrep "\-L"'

else
  with_gcc=no
  wlarc=
fi

# PORTME: fill in a description of your system's C++ link characteristics
case $host_os in
  aix3*)
    # FIXME: insert proper C++ library support
    ld_shlibs=no
    ;;
  aix4* | aix5*)
    archive_cmds=''
    hardcode_direct=yes
    hardcode_libdir_separator=':'