FYI PATCH: Fix Darwin's C++ handling

[Robert Boehne]

Hello,

After looking into building some things on Darwin, I noticed
that C++ is not treated the way C is, and the current Libtool
defaults to g++ behavior which is broken under Mac OS X.
This patch is basically a copy of the C stuff for C++ and it
works. ;)  I consider this an obvious bugfix, and since it
only changes C++ behavior under Darwin, I'm going to check it
in right away.

Cheers!

Robert

2002-12-19  Robert Boehne  <address@hidden>
 
        * libtool.m4 (AC_LIBTOOL_LANG_CXX_CONFIG): Copy the section
        for Darwin from AC_LIBTOOL_PROG_LD_SHLIBS so that the CXX
        tag doesn't use the g++ defaults for the OS X compiler.


Index: libtool.m4
===================================================================
RCS file: /cvsroot/libtool/libtool/libtool.m4,v
retrieving revision 1.281
diff -u -r1.281 libtool.m4
--- libtool.m4  18 Dec 2002 21:04:45 -0000      1.281
+++ libtool.m4  20 Dec 2002 05:18:28 -0000
@@ -2714,6 +2714,28 @@
     fi
        ;;
 
+  darwin* | rhapsody*)
+    case "$host_os" in
+      rhapsody* | darwin1.[[012]])
+      _LT_AC_TAGVAR(allow_undefined_flag, $1)='-undefined suppress'
+      ;;
+    *) # Darwin 1.3 on
+      _LT_AC_TAGVAR(allow_undefined_flag, $1)='-flat_namespace -undefined 
suppress'
+      ;;
+    esac
+
+    # FIXME: Relying on posixy $() will cause problems for
+    #        cross-compilation, but unfortunately the echo tests do not
+    #        yet detect zsh echo's removal of \ escapes.  Also zsh mangles
+    #         `"' quotes if we put them in here... so don't!
+    _LT_AC_TAGVAR(archive_cmds, $1)='$CC -r ${wl}-bind_at_load 
-keep_private_externs -nostdlib -o ${lib}-master.o $libobjs && $CC $(test 
.$module = .yes && echo -bundle || echo -dynamiclib) $allow_undefined_flag -o 
$lib ${lib}-master.o $deplibs$linker_flags $(test .$module != .yes && echo 
-install_name $rpath/$soname $verstring)'
+    # We need to add '_' to the symbols in $export_symbols first
+    #_LT_AC_TAGVAR(archive_expsym_cmds, $1)="$_LT_AC_TAGVAR(archive_cmds, 
$1)"' && strip -s $export_symbols'
+    _LT_AC_TAGVAR(hardcode_direct, $1)=yes
+    _LT_AC_TAGVAR(hardcode_shlibpath_var, $1)=no
+    _LT_AC_TAGVAR(whole_archive_flag_spec, $1)='-all_load $convenience'
+    ;;
+
   dgux*)
     case $cc_basename in
       ec++)