Re: darwin/Fortran: -single_module

[Peter O'Gorman]

Ralf Wildenhues wrote:
> No.  If the stuff looks ok with 8 space tabs, I'm fine.  Please don't
> commit any white-space only changes.  They make searching 'cvs annotate'
> so much more cumbersome.

Hi Ralf,
Fair 'nuff.

I just applied this patch to HEAD. Fixes the archive_expsym_cmds too. Note 
that I do not have any idea if xlc support still works, I added it a couple 
of years ago based on a trial version of the compiler, long since expired.

Thanks,
Peter

Index: ChangeLog
2005-12-07  Peter O'Gorman  <address@hidden>

        * libltdl/config/ltmain.m4sh, libltdl/m4/libtool.m4 [darwin]:
        Use -single_module by default when linking shared libraries. Can
        be overridden by specifying -multi-module or by setting the env
        var LT_MULTI_MODULE before configure.
        * libltdl/m4/libtool.m4 (archive_expsyms_cmds) [darwin]:
        Simplify.
        Reported by Ralf Wildenhues <address@hidden>

from  Ralf Wildenhues <address@hidden>
Index: libltdl/config/ltmain.m4sh
===================================================================
RCS file: /cvsroot/libtool/libtool/libltdl/config/ltmain.m4sh,v
retrieving revision 1.23
diff -u -3 -p -u -r1.23 ltmain.m4sh
--- libltdl/config/ltmain.m4sh 3 Dec 2005 08:48:15 -0000 1.23
+++ libltdl/config/ltmain.m4sh 7 Dec 2005 13:20:13 -0000
@@ -2207,7 +2207,7 @@ func_mode_link ()
     vinfo=
     vinfo_number=no
     weak_libs=
-
+    single_module="${wl}-single_module"
     func_infer_tag $base_compile
 
     # We need to know -static, to get the right output filenames.
@@ -2672,6 +2672,11 @@ func_mode_link ()
            *" $arg "*) ;;
            * ) new_inherited_linker_flags="$new_inherited_linker_flags $arg" ;;
        esac
+       continue
+       ;;
+
+      -multi_module)
+       single_module="${wl}-multi_module"
        continue
        ;;
 
Index: libltdl/m4/libtool.m4
===================================================================
RCS file: /cvsroot/libtool/libtool/libltdl/m4/libtool.m4,v
retrieving revision 1.49
diff -u -3 -p -u -r1.49 libtool.m4
--- libltdl/m4/libtool.m4 27 Nov 2005 15:18:09 -0000 1.49
+++ libltdl/m4/libtool.m4 7 Dec 2005 13:20:15 -0000
@@ -60,7 +60,7 @@ AC_BEFORE([$0], [LT_OUTPUT])dnl
 
 dnl Autoconf doesn't catch unexpanded LT_ macros by default:
 m4_pattern_forbid([^_?LT_[A-Z_]+$])dnl
-m4_pattern_allow([^(_LT_EOF|LT_DLGLOBAL|LT_DLLAZY_OR_NOW)$])dnl
+m4_pattern_allow([^(_LT_EOF|LT_DLGLOBAL|LT_DLLAZY_OR_NOW|LT_MULTI_MODULE)$])dnl
 dnl aclocal doesn't pull ltoptions.m4, ltsugar.m4, or ltversion.m4
 dnl unless we require an AC_DEFUNed macro:
 AC_REQUIRE([LTOPTIONS_VERSION])dnl
@@ -4393,12 +4393,32 @@ _LT_EOF
       _LT_TAGVAR(whole_archive_flag_spec, $1)=''
       _LT_TAGVAR(link_all_deplibs, $1)=yes
       if test "$GCC" = yes ; then
+       AC_CACHE_VAL([lt_cv_apple_cc_single_mod],
+       [lt_cv_apple_cc_single_mod=no
+       if test -z "${LT_MULTI_MODULE}"; then
+         # By default we will add the -single_module flag. You can override
+         # by either setting the environment variable LT_MULTI_MODULE
+         # non-empty at configure time, or by adding -multi-module to the
+         # link flags.
+         echo "int foo(void){return 1;}" > conftest.$ac_ext
+         $CC $CLFAGS $LDFLAGS -o libconftest.dylib \
+             -dynamiclib ${wl}-single_module conftest.$ac_ext
+         if test -f libconftest.dylib; then
+             lt_cv_apple_cc_single_mod=yes
+             rm libconftest.dylib
+         fi
+         rm conftest.$ac_ext
+       fi])
        output_verbose_link_cmd=echo
-       _LT_TAGVAR(archive_cmds, $1)='$CC -dynamiclib $allow_undefined_flag -o 
$lib $libobjs $deplibs $compiler_flags -install_name $rpath/$soname $verstring'
+       if test "X$lt_cv_apple_cc_single_mod" = Xyes ; then
+         _LT_TAGVAR(archive_cmds, $1)='$CC -dynamiclib $single_module 
$allow_undefined_flag -o $lib $libobjs $deplibs $compiler_flags -install_name 
$rpath/$soname $verstring'
+         _LT_TAGVAR(archive_expsym_cmds, $1)='sed "s,^,_," < $export_symbols > 
$output_objdir/${libname}-symbols.expsym~$CC $single_module -dynamiclib 
$allow_undefined_flag -o $lib $libobjs $deplibs $compiler_flags -install_name 
$rpath/$soname $verstring~nmedit -s $output_objdir/${libname}-symbols.expsym 
${lib}'
+       else
+         _LT_TAGVAR(archive_cmds, $1)='$CC -dynamiclib $allow_undefined_flag 
-o $lib $libobjs $deplibs $compiler_flags -install_name $rpath/$soname 
$verstring'
+         _LT_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~nmedit -s $output_objdir/${libname}-symbols.expsym ${lib}'
+       fi
        _LT_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_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_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_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~nmedit -s 
$output_objdir/${libname}-symbols.expsym ${lib}'
       else
        case $cc_basename in
        xlc*)
@@ -4406,8 +4426,8 @@ _LT_EOF
          _LT_TAGVAR(archive_cmds, $1)='$CC -qmkshrobj $allow_undefined_flag -o 
$lib $libobjs $deplibs $compiler_flags ${wl}-install_name ${wl}`$ECHO 
$rpath/$soname` $verstring'
          _LT_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_TAGVAR(archive_expsym_cmds, $1)='sed -e "s,#.*,," -e "s,^[    
]*,," -e "s,^\(..*\),_&," < $export_symbols > 
$output_objdir/${libname}-symbols.expsym~$CC -qmkshrobj $allow_undefined_flag 
-o $lib $libobjs $deplibs $compiler_flags ${wl}-install_name 
${wl}$rpath/$soname $verstring~nmedit -s 
$output_objdir/${libname}-symbols.expsym ${lib}'
-         _LT_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_TAGVAR(archive_expsym_cmds, $1)='sed "s,^,_," < $export_symbols > 
$output_objdir/${libname}-symbols.expsym~$CC -qmkshrobj $allow_undefined_flag 
-o $lib $libobjs $deplibs $compiler_flags ${wl}-install_name 
${wl}$rpath/$soname $verstring~nmedit -s 
$output_objdir/${libname}-symbols.expsym ${lib}'
+         _LT_TAGVAR(module_expsym_cmds, $1)='sed "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_TAGVAR(ld_shlibs, $1)=no
@@ -4415,6 +4435,7 @@ _LT_EOF
        esac
       fi
       ;;
+
     dgux*)
       _LT_TAGVAR(archive_cmds, $1)='$LD -G -h $soname -o $lib $libobjs 
$deplibs $linker_flags'
       _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir'
@@ -5344,75 +5365,72 @@ if test "$_lt_caught_CXX_error" != yes; 
         fi
         ;;
       darwin* | rhapsody*)
-        case $host_os in
-          rhapsody* | darwin1.[[012]])
-            _LT_TAGVAR(allow_undefined_flag, $1)='${wl}-undefined 
${wl}suppress'
-            ;;
-          *) # Darwin 1.3 on
-            case ${MACOSX_DEPLOYMENT_TARGET-10.0} in
-              10.[[012]])
-                _LT_TAGVAR(allow_undefined_flag, $1)='${wl}-flat_namespace 
${wl}-undefined ${wl}suppress'
-                ;;
-              10.*)
-                _LT_TAGVAR(allow_undefined_flag, $1)='${wl}-undefined 
${wl}dynamic_lookup'
-                ;;
-            esac
-            ;;
-        esac
-        _LT_TAGVAR(archive_cmds_need_lc, $1)=no
-        _LT_TAGVAR(hardcode_direct, $1)=no
-        _LT_TAGVAR(hardcode_automatic, $1)=yes
-        _LT_TAGVAR(hardcode_shlibpath_var, $1)=unsupported
-        _LT_TAGVAR(whole_archive_flag_spec, $1)=''
-        _LT_TAGVAR(link_all_deplibs, $1)=yes
-
-        if test "$GXX" = yes ; then
-          lt_int_apple_cc_single_mod=no
-          output_verbose_link_cmd=echo
-          case ${MACOSX_DEPLOYMENT_TARGET-10.0} in
-          10.[[0123]])
-            # only use -single_module on bona fide Apple compilers.
-            if $CC -v 2>&1| grep Apple 2>&1 >/dev/null ; then
-              if $CC -dumpspecs 2>&1 | $GREP 'single_module' >/dev/null ; then
-                lt_int_apple_cc_single_mod=yes
-              fi
-            fi
-            if test "X$lt_int_apple_cc_single_mod" = Xyes ; then
-             _LT_TAGVAR(archive_cmds, $1)='$CC -dynamiclib -single_module 
$allow_undefined_flag -o $lib $libobjs $deplibs $compiler_flags -install_name 
$rpath/$soname $verstring'
-            else
-              _LT_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_TAGVAR(archive_cmds, $1)='$CC -dynamiclib 
$allow_undefined_flag -o $lib $libobjs $deplibs $compiler_flags -install_name 
$rpath/$soname $verstring'
-            ;;
-          esac
-          _LT_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_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_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_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*)
-              output_verbose_link_cmd=echo
-              _LT_TAGVAR(archive_cmds, $1)='$CC -qmkshrobj ${wl}-single_module 
$allow_undefined_flag -o $lib $libobjs $deplibs $compiler_flags 
${wl}-install_name ${wl}`$ECHO "$rpath/$soname"` $verstring'
-              _LT_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,
+       case $host_os in
+         rhapsody* | darwin1.[[012]])
+           _LT_TAGVAR(allow_undefined_flag, $1)='${wl}-undefined ${wl}suppress'
+           ;;
+         *) # Darwin 1.3 on
+           case ${MACOSX_DEPLOYMENT_TARGET-10.0} in
+             10.[[012]])
+               _LT_TAGVAR(allow_undefined_flag, $1)='${wl}-flat_namespace 
${wl}-undefined ${wl}suppress'
+               ;;
+             10.*)
+               _LT_TAGVAR(allow_undefined_flag, $1)='${wl}-undefined 
${wl}dynamic_lookup'
+               ;;
+           esac
+           ;;
+       esac
+       _LT_TAGVAR(archive_cmds_need_lc, $1)=no
+       _LT_TAGVAR(hardcode_direct, $1)=no
+       _LT_TAGVAR(hardcode_automatic, $1)=yes
+       _LT_TAGVAR(hardcode_shlibpath_var, $1)=unsupported
+       _LT_TAGVAR(whole_archive_flag_spec, $1)=''
+       _LT_TAGVAR(link_all_deplibs, $1)=yes
+
+       if test "$GXX" = yes ; then
+         AC_CACHE_VAL([lt_cv_apple_cc_single_mod],
+         [lt_cv_apple_cc_single_mod=no
+         if test -z "${LT_MULTI_MODULE}"; then
+           # By default we will add the -single_module flag. You can override
+           # by either setting the environment variable LT_MULTI_MODULE
+           # non-empty at configure time, or by adding -multi-module to the
+           # link flags.
+           echo "int foo(void){return 1;}" > conftest.$ac_ext
+           $CC $CLFAGS $LDFLAGS -o libconftest.dylib \
+               -dynamiclib ${wl}-single_module conftest.$ac_ext
+           if test -f libconftest.dylib; then
+               lt_cv_apple_cc_single_mod=yes
+               rm libconftest.dylib
+           fi
+           rm conftest.$ac_ext
+         fi])
+         output_verbose_link_cmd=echo
+         if test "X$lt_cv_apple_cc_single_mod" = Xyes ; then
+          _LT_TAGVAR(archive_cmds, $1)='$CC -dynamiclib $single_module 
$allow_undefined_flag -o $lib $libobjs $deplibs $compiler_flags -install_name 
$rpath/$soname $verstring'
+           _LT_TAGVAR(archive_expsym_cmds, $1)='sed "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_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_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~nmedit -s $output_objdir/${libname}-symbols.expsym ${lib}'
+         fi
+         _LT_TAGVAR(module_cmds, $1)='$CC $allow_undefined_flag -o $lib 
-bundle $libobjs $deplibs$compiler_flags'
+         _LT_TAGVAR(module_expsym_cmds, $1)='sed "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*)
+             output_verbose_link_cmd=echo
+             _LT_TAGVAR(archive_cmds, $1)='$CC -qmkshrobj ${wl}-single_module 
$allow_undefined_flag -o $lib $libobjs $deplibs $compiler_flags 
${wl}-install_name ${wl}`$ECHO "$rpath/$soname"` $verstring'
+             _LT_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_TAGVAR(archive_expsym_cmds, $1)='sed -e "s,#.*,," -e "s,^[   
 ]*,," -e "s,^\(..*\),_&," < $export_symbols > 
$output_objdir/${libname}-symbols.expsym~$CC -qmkshrobj ${wl}-single_module 
$allow_undefined_flag -o $lib $libobjs $deplibs $compiler_flags 
${wl}-install_name ${wl}$rpath/$soname $verstring~nmedit -s 
$output_objdir/${libname}-symbols.expsym ${lib}'
-              _LT_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_TAGVAR(ld_shlibs, $1)=no
-              ;;
-          esac
-        fi
-        ;;
+             _LT_TAGVAR(archive_expsym_cmds, $1)='sed "s,^,_," < 
$export_symbols > $output_objdir/${libname}-symbols.expsym~$CC -qmkshrobj 
${wl}-single_module $allow_undefined_flag -o $lib $libobjs $deplibs 
$compiler_flags ${wl}-install_name ${wl}$rpath/$soname $verstring~nmedit -s 
$output_objdir/${libname}-symbols.expsym ${lib}'
+             _LT_TAGVAR(module_expsym_cmds, $1)='sed "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_TAGVAR(ld_shlibs, $1)=no
+             ;;
+         esac
+       fi
+       ;;
 
       dgux*)
         case $cc_basename in