Use -Bsymbolic-functions

The -Bsymbolic-functions linker flag allows to avoid intra-library
PLT jumps on ELF platforms. It is similar to the aliasing hack in
GLib and GTK+, but definitely less messy.

The configure script should look for the flags, in order to support
platforms/linkers that do not have it.

clutter/Makefile.am

@@ -285,6 +285,7 @@ nodist_libclutter_@CLUTTER_SONAME_INFIX@_@CLUTTER_API_VERSION@_la_SOURCES = \
 	$(built_source_h)
 
 libclutter_@CLUTTER_SONAME_INFIX@_@CLUTTER_API_VERSION@_la_LDFLAGS = \
+	$(CLUTTER_LINK_FLAGS) \
 	$(CLUTTER_LT_LDFLAGS) \
 	$(GCOV_LDFLAGS) \
 	-export-dynamic \
@@ -293,9 +294,7 @@ libclutter_@CLUTTER_SONAME_INFIX@_@CLUTTER_API_VERSION@_la_LDFLAGS = \
 	$(win32_resources_ldflag) \
 	$(NULL)
 
-lib_LTLIBRARIES = $(CLUTTER_WINSYS_LIB)
-
-EXTRA_LTLIBRARIES = libclutter-@CLUTTER_SONAME_INFIX@-@CLUTTER_API_VERSION@.la
+lib_LTLIBRARIES = libclutter-@CLUTTER_SONAME_INFIX@-@CLUTTER_API_VERSION@.la
 
 clutterdir = $(includedir)/clutter-$(CLUTTER_API_VERSION)/clutter
 clutter_HEADERS = \

configure.ac

@@ -88,6 +88,7 @@ CLUTTER_LT_LDFLAGS="-version-info $CLUTTER_LT_VERSION"
 
 AC_SUBST(CLUTTER_LT_VERSION)
 AC_SUBST(CLUTTER_LT_LDFLAGS)
+AC_SUBST(CLUTTER_LINK_FLAGS)
 
 dnl ========================================================================
 
@@ -106,6 +107,21 @@ AM_PATH_GLIB_2_0([2.18.0], [have_glib=yes], [have_glib=no],
                  [gobject gthread gmodule-no-export])
 AS_IF([test "x$have_glib" = "xno"], AC_MSG_ERROR([glib-2.0 is required]))
 
+# Check for -Bsymbolic-functions to avoid intra-library PLT jumps
+clutter_LDFLAGS="${LDFLAGS}"
+AC_MSG_CHECKING([for -Bsymbolic-functions linker flag])
+LDFLAGS=-Wl,-Bsymbolic-functions
+AC_TRY_LINK([], [int main (void) { return 0; }],
+            [
+              CLUTTER_LINK_FLAGS=-Wl[,]-Bsymbolic-functions
+              AC_MSG_RESULT([yes])
+            ],
+            [
+              CLUTTER_LINK_FLAGS=
+              AC_MSG_RESULT([no])
+            ])
+LDFLAGS="${clutter_LDFLAGS}"
+
 dnl ========================================================================
 
 # defaults