Add configure-time check for -Wl, --version-script option

This is supported by the GNU linker, but not the Solaris linker, which
is used as the default on that platform even when compiling with GCC.
Omit passing the option to the linker on platforms that do not support
it.

Signed-off-by: Dan McGee <dpmcgee@gmail.com>

configure.ac

@@ -518,6 +518,16 @@ fi
 AC_MSG_RESULT($have_gcc4)
 AC_SUBST(VISIBILITY_HIDDEN_CFLAGS)
 
+dnl ensure linker supports ---version-script option before using it
+AC_CACHE_CHECK([if -Wl,--version-script works], [spice_cv_ld_version_script],
+    [save_LDFLAGS="$LDFLAGS"
+     LDFLAGS="$LDFLAGS -Wl,--version-script=$srcdir/server/spice-server.syms"
+     AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
+        [spice_cv_ld_version_script=yes], [spice_cv_ld_version_script=no])
+     LDFLAGS="$save_LDFLAGS"])
+AM_CONDITIONAL([HAVE_LD_VERSION_SCRIPT],
+    [test x"$spice_cv_ld_version_script" = xyes])
+
 AC_SUBST(SPICE_REQUIRES)
 AC_SUBST(SPICE_NONPKGCONFIG_CFLAGS)
 AC_SUBST(SPICE_NONPKGCONFIG_LIBS)

server/Makefile.am

@@ -31,12 +31,16 @@ generated_marshallers.h: $(top_srcdir)/spice.proto
 
 lib_LTLIBRARIES = libspice-server.la
 
-libspice_server_la_LDFLAGS =						\
-	-version-number $(SPICE_LT_VERSION)				\
-	-Wl,--version-script=$(top_srcdir)/server/spice-server.syms	\
-	-no-undefined							\
+libspice_server_la_LDFLAGS =			\
+	-version-number $(SPICE_LT_VERSION)	\
+	-no-undefined				\
 	$(NULL)
 
+if HAVE_LD_VERSION_SCRIPT
+libspice_server_la_LDFLAGS += \
+	-Wl,--version-script=$(top_srcdir)/server/spice-server.syms
+endif
+
 libspice_server_la_LIBADD =				\
 	$(top_builddir)/common/libspice-common.la	\
 	$(CELT051_LIBS)					\