configure.ac (plugin -rdynamic test): Log result.

	* configure.ac (plugin -rdynamic test): Log result.
	* configure: Regenerate.
	* config/sol2.h (LINK_SPEC): Handle -rdynamic.
	(RDYNAMIC_SPEC): Define.
	* config/sol2-gld.h (RDYNAMIC_SPEC): Redefine.

From-SVN: r158173

gcc/ChangeLog

 2010-04-09  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 
+	* configure.ac (plugin -rdynamic test): Log result.
+	* configure: Regenerate.
+	* config/sol2.h (LINK_SPEC): Handle -rdynamic.
+	(RDYNAMIC_SPEC): Define.
+	* config/sol2-gld.h (RDYNAMIC_SPEC): Redefine.
+
+2010-04-09  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
 	* configure.ac: Determine Sun ld version numbers.
 	(comdat_group): Restrict GNU ld version checks to gld.
 	(comdat_group, *-*-solaris2.1[1-9]*): Enable for Sun ld > 1.1688.

gcc/config/sol2-gld.h

@@ -25,3 +25,7 @@ along with GCC; see the file COPYING3.  If not see
 
 #undef SUPPORTS_INIT_PRIORITY
 #define SUPPORTS_INIT_PRIORITY 1
+
+/* GNU ld needs --export-dynamic to implement -rdynamic.  */
+#undef RDYNAMIC_SPEC
+#define RDYNAMIC_SPEC "--export-dynamic"

gcc/config/sol2.h

@@ -174,12 +174,16 @@ along with GCC; see the file COPYING3.  If not see
 #define LINK_SPEC \
   "%{h*} %{v:-V} \
    %{b} \
+   %{!shared:%{!static:%{rdynamic: " RDYNAMIC_SPEC "}}} \
    %{static:-dn -Bstatic} \
    %{shared:-G -dy %{!mimpure-text:-z text}} \
    %{symbolic:-Bsymbolic -G -dy -z text} \
    %(link_arch) \
    %{Qy:} %{!Qn:-Qy}"
 
+/* With Sun ld, -rdynamic is a no-op.  */
+#define RDYNAMIC_SPEC ""
+
 /* The Solaris linker doesn't understand constructor priorities.  (The
    GNU linker does support constructor priorities, so GNU ld
    configuration files for Solaris override this setting.)  */

gcc/configure

@@ -25234,10 +25234,14 @@ $as_echo_n "checking for exported symbols... " >&6; }
 $as_echo_n "checking for -rdynamic... " >&6; }
     ${CC} ${CFLAGS} ${LDFLAGS} -rdynamic conftest.c -o conftest > /dev/null 2>&1
     if $gcc_cv_objdump -T conftest | grep foobar > /dev/null; then
+      plugin_rdynamic=yes
       pluginlibs="-rdynamic"
     else
+      plugin_rdynamic=no
       enable_plugin=no
     fi
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: $plugin_rdynamic" >&5
+$as_echo "$plugin_rdynamic" >&6; }
   fi
 
   # Check -ldl

gcc/configure.ac

@@ -4449,10 +4449,13 @@ if test x"$enable_plugin" = x"yes"; then
     AC_MSG_CHECKING([for -rdynamic])
     ${CC} ${CFLAGS} ${LDFLAGS} -rdynamic conftest.c -o conftest > /dev/null 2>&1
     if $gcc_cv_objdump -T conftest | grep foobar > /dev/null; then
+      plugin_rdynamic=yes
       pluginlibs="-rdynamic"
     else
+      plugin_rdynamic=no
       enable_plugin=no
     fi
+    AC_MSG_RESULT([$plugin_rdynamic])
   fi
 
   # Check -ldl