Bug 802343 - Port |Bug 557000 - Correctly set GCC_VERSION on mingw| and |Bug 797793 - Disable format warnings on mingw| to comm-central r=Callek

configure.in

@@ -1857,6 +1857,12 @@ ia64*-hpux*)
         XPCOM_FROZEN_LDOPTS='-L$(LIBXUL_DIST)/lib -lxpcom -lmozalloc'
         DLL_PREFIX=
         IMPORT_LIB_SUFFIX=dll.a
+        GCC_VERSION=`$CC -v 2>&1 | awk '/^gcc version/ { print $3 }'`
+
+        # We use mix of both POSIX and Win32 printf format across the tree,
+        # so format warnings are useless on mingw.
+        MOZ_C_SUPPORTS_WARNING(-Wno-, format, ac_c_has_wno_format)
+        MOZ_CXX_SUPPORTS_WARNING(-Wno-, format, ac_cxx_has_wno_format)
     else
         TARGET_COMPILER_ABI=msvc
         HOST_CC='$(CC)'