Use darwin's -force_load flag if available for whole_archive_flag_spec

* libltdl/m4/libtool.m4 (_LT_REQUIRED_DARWIN_CHECKS): Check for
-force_load and use it if there.
* tests/darwin.at: Add a simple test.

ChangeLog

@@ -1,3 +1,10 @@
+2009-09-07  Peter O'Gorman  <peter@pogma.com
+
+	Use darwin's -force_load flag if available for whole_archive_flag_spec
+	* libltdl/m4/libtool.m4 (_LT_REQUIRED_DARWIN_CHECKS): Check for
+	-force_load and use it if there.
+	* tests/darwin.at: Add a simple test.
+
 2009-09-06  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
 
 	Testsuite keyword 'interactive' and check-* rules.

libltdl/m4/libtool.m4

@@ -971,6 +971,29 @@ m4_defun_once([_LT_REQUIRED_DARWIN_CHECKS],[
 	[lt_cv_ld_exported_symbols_list=no])
 	LDFLAGS="$save_LDFLAGS"
     ])
+    AC_CACHE_CHECK([for -force_load linker flag],[lt_cv_ld_force_load],
+      [lt_cv_ld_force_load=no
+      cat > conftest.c << _LT_EOF
+int forced_loaded() { return 2;}
+_LT_EOF
+      echo "$LTCC $LTCFLAGS -c -o conftest.o conftest.c" >&AS_MESSAGE_LOG_FD
+      $LTCC $LTCFLAGS -c -o conftest.o conftest.c 2>&AS_MESSAGE_LOG_FD
+      echo "$AR cru libconftest.a conftest.o" >&AS_MESSAGE_LOG_FD
+      $AR cru libconftest.a conftest.o 2>&AS_MESSAGE_LOG_FD
+      cat > conftest.c << _LT_EOF
+int main() { return 0;}
+_LT_EOF
+      echo "$LTCC $LTCFLAGS $LDFLAGS -o conftest conftest.c -Wl,-force_load,./libconftest.a" >&AS_MESSAGE_LOG_FD
+      $LTCC $LTCFLAGS $LDFLAGS -o conftest conftest.c -Wl,-force_load,./libconftest.a 2>conftest.err
+      _lt_result=$?
+      if test -f conftest && test ! -s conftest.err && test $_lt_result = 0 && $GREP forced_load conftest 2>&1 >/dev/null; then
+	lt_cv_ld_force_load=yes
+      else
+	cat conftest.err >&AS_MESSAGE_LOG_FD
+      fi
+        rm -f conftest.err conftest.a conftest conftest.c
+        rm -rf conftest.dSYM
+    ])
     case $host_os in
     rhapsody* | darwin1.[[012]])
       _lt_dar_allow_undefined='${wl}-undefined ${wl}suppress' ;;
@@ -998,7 +1021,7 @@ m4_defun_once([_LT_REQUIRED_DARWIN_CHECKS],[
     else
       _lt_dar_export_syms='~$NMEDIT -s $output_objdir/${libname}-symbols.expsym ${lib}'
     fi
-    if test "$DSYMUTIL" != ":"; then
+    if test "$DSYMUTIL" != ":" && test "$lt_cv_ld_force_load" = "no"; then
       _lt_dsymutil='~$DSYMUTIL $lib || :'
     else
       _lt_dsymutil=
@@ -1018,7 +1041,11 @@ m4_defun([_LT_DARWIN_LINKER_FEATURES],
   _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, $1)=''
+  if test "$lt_cv_ld_force_load" = "yes"; then
+    _LT_TAGVAR(whole_archive_flag_spec, $1)='`for conv in $convenience\"\"; do test  -n \"$conv\" && new_convenience=\"$new_convenience ${wl}-force_load,$conv\"; done; func_echo_all \"$new_convenience\"`'
+  else
+    _LT_TAGVAR(whole_archive_flag_spec, $1)=''
+  fi
   _LT_TAGVAR(link_all_deplibs, $1)=yes
   _LT_TAGVAR(allow_undefined_flag, $1)="$_lt_dar_allow_undefined"
   case $cc_basename in

tests/darwin.at

@@ -148,3 +148,59 @@ AT_CHECK([$LIBTOOL --dry-run --mode=link $CC $CFLAGS $LDFLAGS ]dnl
 AT_CHECK([grep stamp $lockfile], [], [ignore])
 
 AT_CLEANUP
+
+AT_SETUP([darwin gdb debug information])
+
+AT_CHECK([gdb --version || (exit 77)],[ignore],[ignore],[ignore])
+
+AT_DATA([foo.c], [[
+int foo (void) { return 0; }
+]])
+
+AT_DATA([bar.c], [[
+extern int foo (void);
+int bar (void) { return foo (); }
+]])
+
+AT_DATA([main.c], [[
+extern int bar(void);
+
+int main() { return bar();}
+]])
+
+AT_CHECK([$LIBTOOL --mode=compile $CC $CPPFLAGS $CFLAGS -c bar.c],
+	 [], [ignore], [ignore])
+AT_CHECK([$LIBTOOL --mode=compile $CC $CPPFLAGS $CFLAGS -c foo.c],
+	 [], [ignore], [ignore])
+AT_CHECK([$LIBTOOL --mode=compile $CC $CPPFLAGS $CFLAGS -c main.c],
+	 [], [ignore], [ignore])
+
+AT_CHECK([$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o libfoo.la foo.lo],
+	 [], [ignore], [ignore])
+
+AT_CHECK([$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS ]dnl
+	 [  -o libbar.la bar.lo -rpath /foo libfoo.la ],
+	 [], [ignore], [ignore])
+
+AT_CHECK([$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS ]dnl
+	 [  -o main main.lo libbar.la],[], [ignore], [ignore])
+AT_CHECK([echo quit | $LIBTOOL --mode=execute gdb main 2>err1],
+	 [ignore], [ignore], [stderr])
+
+AT_CHECK([grep 'Could not find object file' stderr],[1],[ignore],[ignore])
+
+AT_XFAIL_IF([
+eval "`$LIBTOOL --config | $EGREP '^(whole_archive_flag_spec)='`"
+case $whole_archive_flag_spec:$host_os in
+:darwin*) : ;;
+*) false ;;
+esac ])
+
+# Remove any dSYM bundle
+rm -rf .libs/*.dSYM
+
+AT_CHECK([echo quit | $LIBTOOL --mode=execute gdb main],
+	 [ignore], [ignore], [stderr])
+AT_CHECK([grep 'Could not find object file' stderr],[1],[ignore],[ignore])
+
+AT_CLEANUP