backport darwin bits to branch-1-5

[Peter O'Gorman]

Hi,
This is a backport of the recent darwin changes in HEAD.

Committed to branch-1-5.

Peter
-- 
Peter O'Gorman
http://pogma.com

 2008-01-30  Peter O'Gorman  <address@hidden>
 
        Backport darwin support reorganization from HEAD.
        * libtool.m4 [darwin]: Check for nmedit and dsymutil with
        AC_CHECK_TOOL, use -single_module by default (can be turned off
        with the -multi-module linker flag or by setting the
        LT_MULTI_MODULE environment variable. If it is available use
        -exported_symbols_list instead of nmedit to remove symbols. 
        * ltmain.in [darwin]: Use -single_module by default.

Index: libtool.m4
===================================================================
RCS file: /sources/libtool/libtool/Attic/libtool.m4,v
retrieving revision 1.314.2.194
diff -u -r1.314.2.194 libtool.m4
--- libtool.m4  28 Jan 2008 15:49:41 -0000      1.314.2.194
+++ libtool.m4  30 Jan 2008 06:35:49 -0000
@@ -95,7 +95,6 @@
 AC_REQUIRE([AC_OBJEXT])dnl
 AC_REQUIRE([AC_EXEEXT])dnl
 dnl
-
 AC_LIBTOOL_SYS_MAX_CMD_LEN
 AC_LIBTOOL_SYS_GLOBAL_SYMBOL_PIPE
 AC_LIBTOOL_OBJDIR
@@ -197,6 +196,8 @@
   ;;
 esac
 
+_LT_REQUIRED_DARWIN_CHECKS
+
 AC_PROVIDE_IFELSE([AC_LIBTOOL_DLOPEN], enable_dlopen=yes, enable_dlopen=no)
 AC_PROVIDE_IFELSE([AC_LIBTOOL_WIN32_DLL],
 enable_win32_dll=yes, enable_win32_dll=no)
@@ -279,6 +280,77 @@
 $rm -r conftest*
 ])# _LT_LINKER_BOILERPLATE
 
+# _LT_REQUIRED_DARWIN_CHECKS
+# --------------------------
+# Check for some things on darwin
+AC_DEFUN([_LT_REQUIRED_DARWIN_CHECKS],[
+  case $host_os in
+    rhapsody* | darwin*)
+    AC_CHECK_TOOL([DSYMUTIL], [dsymutil], [:])
+    AC_CHECK_TOOL([NMEDIT], [nmedit], [:])
+
+    AC_CACHE_CHECK([for -single_module linker 
flag],[lt_cv_apple_cc_single_mod],
+      [lt_cv_apple_cc_single_mod=no
+      if test -z "${LT_MULTI_MODULE}"; then
+   # By default we will add the -single_module flag. You can override
+   # by either setting the environment variable LT_MULTI_MODULE
+   # non-empty at configure time, or by adding -multi_module to the
+   # link flags.
+   echo "int foo(void){return 1;}" > conftest.c
+   $LTCC $LTCFLAGS $LDFLAGS -o libconftest.dylib \
+     -dynamiclib ${wl}-single_module conftest.c
+   if test -f libconftest.dylib; then
+     lt_cv_apple_cc_single_mod=yes
+     rm -rf libconftest.dylib*
+   fi
+   rm conftest.c
+      fi])
+    AC_CACHE_CHECK([for -exported_symbols_list linker flag],
+      [lt_cv_ld_exported_symbols_list],
+      [lt_cv_ld_exported_symbols_list=no
+      save_LDFLAGS=$LDFLAGS
+      echo "_main" > conftest.sym
+      LDFLAGS="$LDFLAGS -Wl,-exported_symbols_list,conftest.sym"
+      AC_LINK_IFELSE([AC_LANG_PROGRAM([],[])],
+   [lt_cv_ld_exported_symbols_list=yes],
+   [lt_cv_ld_exported_symbols_list=no])
+   LDFLAGS="$save_LDFLAGS"
+    ])
+    case $host_os in
+    rhapsody* | darwin1.[[0123]])
+      _lt_dar_allow_undefined='${wl}-undefined ${wl}suppress' ;;
+    darwin1.*)
+     _lt_dar_allow_undefined='${wl}-flat_namespace ${wl}-undefined 
${wl}suppress' ;;
+    darwin*)
+      # if running on 10.5 or later, the deployment target defaults
+      # to the OS version, if on x86, and 10.4, the deployment
+      # target defaults to 10.4. Don't you love it?
+      case ${MACOSX_DEPLOYMENT_TARGET-10.0},$host in
+   10.0,*86*-darwin8*|10.0,*-darwin[[91]]*)
+     _lt_dar_allow_undefined='${wl}-undefined ${wl}dynamic_lookup' ;;
+   10.[[012]]*)
+     _lt_dar_allow_undefined='${wl}-flat_namespace ${wl}-undefined 
${wl}suppress' ;;
+   10.*)
+     _lt_dar_allow_undefined='${wl}-undefined ${wl}dynamic_lookup' ;;
+      esac
+    ;;
+  esac
+    if test "$lt_cv_apple_cc_single_mod" = "yes"; then
+      _lt_dar_single_mod='$single_module'
+    fi
+    if test "$lt_cv_ld_exported_symbols_list" = "yes"; then
+      _lt_dar_export_syms=' 
${wl}-exported_symbols_list,$output_objdir/${libname}-symbols.expsym'
+    else
+      _lt_dar_export_syms="~$NMEDIT -s 
\$output_objdir/\${libname}-symbols.expsym \${lib}"
+    fi
+    if test "$DSYMUTIL" != ":"; then
+      _lt_dsymutil="~$DSYMUTIL \$lib || :"
+    else
+      _lt_dsymutil=
+    fi
+    ;;
+  esac
+])
 
 # _LT_AC_SYS_LIBPATH_AIX
 # ----------------------
@@ -3089,51 +3161,23 @@
     fi
   ;;
       darwin* | rhapsody*)
-        case $host_os in
-        rhapsody* | darwin1.[[012]])
-         _LT_AC_TAGVAR(allow_undefined_flag, $1)='${wl}-undefined 
${wl}suppress'
-         ;;
-       *) # Darwin 1.3 on
-         if test -z ${MACOSX_DEPLOYMENT_TARGET} ; then
-           _LT_AC_TAGVAR(allow_undefined_flag, $1)='${wl}-flat_namespace 
${wl}-undefined ${wl}suppress'
-         else
-           case ${MACOSX_DEPLOYMENT_TARGET} in
-             10.[[012]])
-               _LT_AC_TAGVAR(allow_undefined_flag, $1)='${wl}-flat_namespace 
${wl}-undefined ${wl}suppress'
-               ;;
-             10.*)
-               _LT_AC_TAGVAR(allow_undefined_flag, $1)='${wl}-undefined 
${wl}dynamic_lookup'
-               ;;
-           esac
-         fi
-         ;;
-        esac
       _LT_AC_TAGVAR(archive_cmds_need_lc, $1)=no
       _LT_AC_TAGVAR(hardcode_direct, $1)=no
       _LT_AC_TAGVAR(hardcode_automatic, $1)=yes
       _LT_AC_TAGVAR(hardcode_shlibpath_var, $1)=unsupported
       _LT_AC_TAGVAR(whole_archive_flag_spec, $1)=''
       _LT_AC_TAGVAR(link_all_deplibs, $1)=yes
-
-    if test "$GXX" = yes ; then
-      lt_int_apple_cc_single_mod=no
+      _LT_AC_TAGVAR(allow_undefined_flag, $1)="$_lt_dar_allow_undefined"
+      if test "$GXX" = yes ; then
       output_verbose_link_cmd='echo'
-      if $CC -dumpspecs 2>&1 | $EGREP 'single_module' >/dev/null ; then
-       lt_int_apple_cc_single_mod=yes
+      _LT_AC_TAGVAR(archive_cmds, $1)="\$CC -dynamiclib \$allow_undefined_flag 
-o \$lib \$libobjs \$deplibs \$compiler_flags -install_name \$rpath/\$soname 
\$verstring $_lt_dar_single_mod${_lt_dsymutil}"
+      _LT_AC_TAGVAR(module_cmds, $1)="\$CC \$allow_undefined_flag -o \$lib 
-bundle \$libobjs \$deplibs \$compiler_flags${_lt_dsymutil}"
+      _LT_AC_TAGVAR(archive_expsym_cmds, $1)="sed 's,^,_,' < \$export_symbols 
> \$output_objdir/\${libname}-symbols.expsym~\$CC -dynamiclib 
\$allow_undefined_flag -o \$lib \$libobjs \$deplibs \$compiler_flags 
-install_name \$rpath/\$soname \$verstring 
${_lt_dar_single_mod}${_lt_dar_export_syms}${_lt_dsymutil}"
+      _LT_AC_TAGVAR(module_expsym_cmds, $1)="sed -e 's,^,_,' < 
\$export_symbols > \$output_objdir/\${libname}-symbols.expsym~\$CC 
\$allow_undefined_flag -o \$lib -bundle \$libobjs \$deplibs 
\$compiler_flags${_lt_dar_export_syms}${_lt_dsymutil}"
+      if test "$lt_cv_apple_cc_single_mod" != "yes"; then
+        _LT_AC_TAGVAR(archive_cmds, $1)="\$CC -r -keep_private_externs 
-nostdlib -o \${lib}-master.o \$libobjs~\$CC -dynamiclib \$allow_undefined_flag 
-o \$lib \${lib}-master.o \$deplibs \$compiler_flags -install_name 
\$rpath/\$soname \$verstring${_lt_dsymutil}"
+        _LT_AC_TAGVAR(archive_expsym_cmds, $1)="sed 's,^,_,' < 
\$export_symbols > \$output_objdir/\${libname}-symbols.expsym~\$CC -r 
-keep_private_externs -nostdlib -o \${lib}-master.o \$libobjs~\$CC -dynamiclib 
\$allow_undefined_flag -o \$lib \${lib}-master.o \$deplibs \$compiler_flags 
-install_name \$rpath/\$soname \$verstring${_lt_dar_export_syms}${_lt_dsymutil}"
       fi
-      if test "X$lt_int_apple_cc_single_mod" = Xyes ; then
-       _LT_AC_TAGVAR(archive_cmds, $1)='$CC -dynamiclib -single_module 
$allow_undefined_flag -o $lib $libobjs $deplibs $compiler_flags -install_name 
$rpath/$soname $verstring'
-      else
-          _LT_AC_TAGVAR(archive_cmds, $1)='$CC -r -keep_private_externs 
-nostdlib -o ${lib}-master.o $libobjs~$CC -dynamiclib $allow_undefined_flag -o 
$lib ${lib}-master.o $deplibs $compiler_flags -install_name $rpath/$soname 
$verstring'
-        fi
-        _LT_AC_TAGVAR(module_cmds, $1)='$CC $allow_undefined_flag -o $lib 
-bundle $libobjs $deplibs$compiler_flags'
-        # Don't fix this by using the ld -exported_symbols_list flag, it 
doesn't exist in older darwin lds
-          if test "X$lt_int_apple_cc_single_mod" = Xyes ; then
-            _LT_AC_TAGVAR(archive_expsym_cmds, $1)='sed -e "s,#.*,," -e "s,^[  
  ]*,," -e "s,^\(..*\),_&," < $export_symbols > 
$output_objdir/${libname}-symbols.expsym~$CC -dynamiclib -single_module 
$allow_undefined_flag -o $lib $libobjs $deplibs $compiler_flags -install_name 
$rpath/$soname $verstring~nmedit -s $output_objdir/${libname}-symbols.expsym 
${lib}'
-          else
-            _LT_AC_TAGVAR(archive_expsym_cmds, $1)='sed -e "s,#.*,," -e "s,^[  
  ]*,," -e "s,^\(..*\),_&," < $export_symbols > 
$output_objdir/${libname}-symbols.expsym~$CC -r -keep_private_externs -nostdlib 
-o ${lib}-master.o $libobjs~$CC -dynamiclib $allow_undefined_flag -o $lib 
${lib}-master.o $deplibs $compiler_flags -install_name $rpath/$soname 
$verstring~nmedit -s $output_objdir/${libname}-symbols.expsym ${lib}'
-          fi
-            _LT_AC_TAGVAR(module_expsym_cmds, $1)='sed -e "s,#.*,," -e "s,^[   
 ]*,," -e "s,^\(..*\),_&," < $export_symbols > 
$output_objdir/${libname}-symbols.expsym~$CC $allow_undefined_flag  -o $lib 
-bundle $libobjs $deplibs$compiler_flags~nmedit -s 
$output_objdir/${libname}-symbols.expsym ${lib}'
       else
       case $cc_basename in
         xlc*)
@@ -6025,11 +6069,10 @@
       _LT_AC_TAGVAR(link_all_deplibs, $1)=yes
     if test "$GCC" = yes ; then
        output_verbose_link_cmd='echo'
-        _LT_AC_TAGVAR(archive_cmds, $1)='$CC -dynamiclib $allow_undefined_flag 
-o $lib $libobjs $deplibs $compiler_flags -install_name $rpath/$soname 
$verstring'
-      _LT_AC_TAGVAR(module_cmds, $1)='$CC $allow_undefined_flag -o $lib 
-bundle $libobjs $deplibs$compiler_flags'
-      # Don't fix this by using the ld -exported_symbols_list flag, it doesn't 
exist in older darwin lds
-      _LT_AC_TAGVAR(archive_expsym_cmds, $1)='sed -e "s,#.*,," -e "s,^[    
]*,," -e "s,^\(..*\),_&," < $export_symbols > 
$output_objdir/${libname}-symbols.expsym~$CC -dynamiclib $allow_undefined_flag 
-o $lib $libobjs $deplibs $compiler_flags -install_name $rpath/$soname 
$verstring~nmedit -s $output_objdir/${libname}-symbols.expsym ${lib}'
-      _LT_AC_TAGVAR(module_expsym_cmds, $1)='sed -e "s,#.*,," -e "s,^[    
]*,," -e "s,^\(..*\),_&," < $export_symbols > 
$output_objdir/${libname}-symbols.expsym~$CC $allow_undefined_flag  -o $lib 
-bundle $libobjs $deplibs$compiler_flags~nmedit -s 
$output_objdir/${libname}-symbols.expsym ${lib}'
+        _LT_AC_TAGVAR(archive_cmds, $1)="\$CC -dynamiclib 
\$allow_undefined_flag -o \$lib \$libobjs \$deplibs \$compiler_flags 
-install_name \$rpath/\$soname \$verstring $_lt_dar_single_mod${_lt_dsymutil}"
+        _LT_AC_TAGVAR(module_cmds, $1)="\$CC \$allow_undefined_flag -o \$lib 
-bundle \$libobjs \$deplibs \$compiler_flags${_lt_dsymutil}"
+        _LT_AC_TAGVAR(archive_expsym_cmds, $1)="sed 's,^,_,' < 
\$export_symbols > \$output_objdir/\${libname}-symbols.expsym~\$CC -dynamiclib 
\$allow_undefined_flag -o \$lib \$libobjs \$deplibs \$compiler_flags 
-install_name \$rpath/\$soname \$verstring 
${_lt_dar_single_mod}${_lt_dar_export_syms}${_lt_dsymutil}"
+        _LT_AC_TAGVAR(module_expsym_cmds, $1)="sed -e 's,^,_,' < 
\$export_symbols > \$output_objdir/\${libname}-symbols.expsym~\$CC 
\$allow_undefined_flag -o \$lib -bundle \$libobjs \$deplibs 
\$compiler_flags${_lt_dar_export_syms}${_lt_dsymutil}"
     else
       case $cc_basename in
         xlc*)
Index: ltmain.in
===================================================================
RCS file: /sources/libtool/libtool/Attic/ltmain.in,v
retrieving revision 1.334.2.149
diff -u -r1.334.2.149 ltmain.in
--- ltmain.in   28 Jan 2008 15:49:42 -0000      1.334.2.149
+++ ltmain.in   30 Jan 2008 06:35:52 -0000
@@ -1168,6 +1168,7 @@
     thread_safe=no
     vinfo=
     vinfo_number=no
+    single_module="${wl}-single_module"
 
     func_infer_tag $base_compile
 
@@ -1653,6 +1654,11 @@
        continue
        ;;
 
+      -multi_module)
+       single_module="${wl}-multi_module"
+       continue
+       ;;
+
       -module)
        module=yes
        continue