| 1 | #### This script is meant to be sourced by ltconfig.
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| 2 |
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| 3 | # ltcf-cxx.sh - Create a C++ compiler specific configuration
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| 4 | #
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| 5 | # Copyright (C) 1996-1999, 2000, 2001, 2003 Free Software Foundation, Inc.
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| 6 | # Originally by Gordon Matzigkeit <[email protected]>, 1996
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| 7 | #
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| 8 | # Original C++ support by:Gary V. Vaughan <[email protected]>
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| 9 | # Alexandre Oliva <[email protected]>
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| 10 | # Ossama Othman <[email protected]>
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| 11 | # Thomas Thanner <[email protected]>
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| 12 | #
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| 13 | # This file is free software; you can redistribute it and/or modify it
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| 14 | # under the terms of the GNU General Public License as published by
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| 15 | # the Free Software Foundation; either version 2 of the License, or
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| 16 | # (at your option) any later version.
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| 17 | #
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| 18 | # This program is distributed in the hope that it will be useful, but
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| 19 | # WITHOUT ANY WARRANTY; without even the implied warranty of
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| 20 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 21 | # General Public License for more details.
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| 22 | #
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| 23 | # You should have received a copy of the GNU General Public License
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| 24 | # along with this program; if not, write to the Free Software
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| 25 | # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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| 26 | #
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| 27 | # As a special exception to the GNU General Public License, if you
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| 28 | # distribute this file as part of a program that contains a
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| 29 | # configuration script generated by Autoconf, you may include it under
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| 30 | # the same distribution terms that you use for the rest of that program.
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| 31 |
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| 32 |
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| 33 | # Source file extension for C++ test sources.
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| 34 | ac_ext=cc
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| 35 |
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| 36 | # Object file extension for compiled C++ test sources.
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| 37 | objext=o
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| 38 |
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| 39 | # Code to be used in simple compile tests
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| 40 | lt_simple_compile_test_code="int some_variable = 0;"
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| 41 |
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| 42 | # Code to be used in simple link tests
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| 43 | lt_simple_link_test_code='int main(int, char *[]) { return (0); }'
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| 44 |
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| 45 | # C++ compiler
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| 46 | CXX=${CXX-c++}
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| 47 |
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| 48 | # ltmain only uses $CC for tagged configurations so make sure $CC is set.
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| 49 | CC=${CC-"$CXX"}
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| 50 | CFLAGS=${CFLAGS-"$CXXFLAGS"}
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| 51 |
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| 52 | # Allow CC to be a program name with arguments.
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| 53 | set dummy $CC
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| 54 | compiler=$2
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| 55 | cc_basename=`$echo X"$compiler" | $Xsed -e 's%^.*/%%'`
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| 56 |
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| 57 | # Check if we are using GNU gcc (taken/adapted from configure script)
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| 58 | # We need to check here since "--with-gcc" is set at configure time,
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| 59 | # not ltconfig time!
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| 60 | cat > conftest.$ac_ext <<EOF
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| 61 | #ifdef __GNUC__
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| 62 | yes;
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| 63 | #endif
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| 64 | EOF
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| 65 | if { ac_try='${CC-c++} -E conftest.$ac_ext'; { (eval echo \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; } | egrep yes >/dev/null 2>&1; then
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| 66 | with_gcc=yes
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| 67 |
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| 68 | # Set up default GNU C++ configuration
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| 69 |
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| 70 | # Check if GNU C++ uses GNU ld as the underlying linker, since the
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| 71 | # archiving commands below assume that GNU ld is being used. The
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| 72 | # assumption here is that the linker is going to be the same as that
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| 73 | # used by the C compiler. For the purposes of GCC, this is ok, but
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| 74 | # if someone uses g++ along with a non-GNU C compiler that doesn't
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| 75 | # use GNU ld, we may lose. This is ok for the toolchain tree, since
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| 76 | # the only users of ltcf-cxx.sh are libstdc++-v3 and libjava,
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| 77 | # anyway, and those use both gcc and g++, so the settings are bound
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| 78 | # to be the same.
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| 79 |
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| 80 | if test "$with_gnu_ld" = yes; then
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| 81 | archive_cmds='$CC -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $wl$soname -o $lib'
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| 82 | archive_expsym_cmds='$CC -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib'
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| 83 |
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| 84 | hardcode_libdir_flag_spec='${wl}--rpath ${wl}$libdir'
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| 85 | export_dynamic_flag_spec='${wl}--export-dynamic'
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| 86 |
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| 87 | # If archive_cmds runs LD, not CC, wlarc should be empty
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| 88 | # XXX I think wlarc can be eliminated in ltcf-cxx, but I need to
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| 89 | # investigate it a little bit more. (MM)
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| 90 | wlarc='${wl}'
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| 91 |
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| 92 | # ancient GNU ld didn't support --whole-archive et. al.
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| 93 | if eval "`$CC -print-prog-name=ld` --help 2>&1" | \
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| 94 | egrep 'no-whole-archive' > /dev/null; then
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| 95 | whole_archive_flag_spec="$wlarc"'--whole-archive$convenience '"$wlarc"'--no-whole-archive'
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| 96 | else
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| 97 | whole_archive_flag_spec=
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| 98 | fi
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| 99 | else
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| 100 | wlarc=
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| 101 |
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| 102 | # A generic and very simple default shared library creation
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| 103 | # command for GNU C++ for the case where it uses the native
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| 104 | # linker, instead of GNU ld. If possible, this setting should
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| 105 | # overridden to take advantage of the native linker features on
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| 106 | # the platform it is being used on.
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| 107 | archive_cmds='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -o $lib'
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| 108 | fi
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| 109 |
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| 110 | # Commands to make compiler produce verbose output that lists
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| 111 | # what "hidden" libraries, object files and flags are used when
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| 112 | # linking a shared library.
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| 113 | output_verbose_link_cmd='$CC -shared $CFLAGS -v conftest.$objext 2>&1 | egrep "\-L"'
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| 114 |
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| 115 | else
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| 116 | with_gcc=no
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| 117 | wlarc=
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| 118 | fi
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| 119 |
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| 120 | # PORTME: fill in a description of your system's C++ link characteristics
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| 121 | case $host_os in
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| 122 | aix3*)
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| 123 | # FIXME: insert proper C++ library support
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| 124 | ld_shlibs=no
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| 125 | ;;
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| 126 | aix4* | aix5*)
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| 127 | archive_cmds=''
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| 128 | hardcode_direct=yes
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| 129 | hardcode_libdir_separator=':'
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| 130 | link_all_deplibs=yes
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| 131 | # When large executables or shared objects are built, AIX ld can
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| 132 | # have problems creating the table of contents. If linking a library
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| 133 | # or program results in "error TOC overflow" add -mminimal-toc to
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| 134 | # CXXFLAGS/CFLAGS for g++/gcc. In the cases where that is not
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| 135 | # enough to fix the problem, add -Wl,-bbigtoc to LDFLAGS.
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| 136 | if test "$with_gcc" = yes; then
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| 137 | case $host_os in aix4.[012]|aix4.[012].*)
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| 138 | # We only want to do this on AIX 4.2 and lower, the check
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| 139 | # below for broken collect2 doesn't work under 4.3+
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| 140 | collect2name=`${CC} -print-prog-name=collect2`
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| 141 | if test -f "$collect2name" && \
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| 142 | strings "$collect2name" | grep resolve_lib_name >/dev/null
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| 143 | then
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| 144 | # We have reworked collect2
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| 145 | hardcode_direct=yes
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| 146 | else
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| 147 | # We have old collect2
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| 148 | hardcode_direct=unsupported
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| 149 | # It fails to find uninstalled libraries when the uninstalled
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| 150 | # path is not listed in the libpath. Setting hardcode_minus_L
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| 151 | # to unsupported forces relinking
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| 152 | hardcode_minus_L=yes
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| 153 | hardcode_libdir_flag_spec='-L$libdir'
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| 154 | hardcode_libdir_separator=
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| 155 | fi
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| 156 | esac
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| 157 | shared_flag='-shared'
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| 158 | else
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| 159 | # not using gcc
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| 160 | if test "$host_cpu" = ia64; then
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| 161 | shared_flag='${wl}-G'
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| 162 | else
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| 163 | shared_flag='${wl}-bM:SRE'
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| 164 | fi
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| 165 | fi
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| 166 |
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| 167 | if test "$host_cpu" = ia64; then
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| 168 | # On IA64, the linker does run time linking by default, so we don't
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| 169 | # have to do anything special.
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| 170 | aix_use_runtimelinking=no
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| 171 | if test $with_gnu_ld = no; then
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| 172 | exp_sym_flag='-Bexport'
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| 173 | no_entry_flag=""
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| 174 | fi
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| 175 | else
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| 176 | # Test if we are trying to use run time linking, or normal AIX style linking.
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| 177 | # If -brtl is somewhere in LDFLAGS, we need to do run time linking.
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| 178 | aix_use_runtimelinking=no
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| 179 | for ld_flag in $LDFLAGS; do
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| 180 | if (test $ld_flag = "-brtl" || test $ld_flag = "-Wl,-brtl" ); then
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| 181 | aix_use_runtimelinking=yes
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| 182 | break
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| 183 | fi
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| 184 | done
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| 185 | exp_sym_flag='-bexport'
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| 186 | no_entry_flag='-bnoentry'
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| 187 | fi
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| 188 | # It seems that -bexpall does not export symbols beginning with
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| 189 | # underscore (_), so it is better to generate a list of symbols to export.
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| 190 | always_export_symbols=yes
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| 191 | if test "$aix_use_runtimelinking" = yes; then
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| 192 | hardcode_libdir_flag_spec='${wl}-blibpath:$libdir:/usr/lib:/lib'
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| 193 | allow_undefined_flag=' -Wl,-G'
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| 194 | archive_expsym_cmds="\$CC $shared_flag"' -o $output_objdir/$soname $libobjs $deplibs $compiler_flags ${allow_undefined_flag} '"\${wl}$no_entry_flag \${wl}-brtl \${wl}$exp_sym_flag:\$export_symbols"
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| 195 | else
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| 196 | if test "$host_cpu" = ia64; then
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| 197 | if test $with_gnu_ld = no; then
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| 198 | hardcode_libdir_flag_spec='${wl}-R $libdir:/usr/lib:/lib'
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| 199 | allow_undefined_flag="-z nodefs"
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| 200 | archive_expsym_cmds="\$CC $shared_flag"' -o $output_objdir/$soname $libobjs $deplibs $compiler_flags ${wl}${allow_undefined_flag} '"\${wl}$no_entry_flag \${wl}$exp_sym_flag:\$export_symbols"
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