Changed C++ compiler version errors to warnings if the compiler version is 5 or newer (bug 564194)

Change-Id: Id6045fb10f6caae8fc5415fa8048a9c3bbe523df
Signed-off-by: Botond Baranyi <botond.baranyi@ericsson.com>

core/gccversion.c

@@ -71,11 +71,11 @@ int main(void)
 #else
     "#if GCC_VERSION != %d\n"
 #endif
-    "#error The version of " COMPILER_NAME_STRING " does not match the expected version (" COMPILER_NAME_STRING " %d.%d.%d)\n"
+    "#%s The version of " COMPILER_NAME_STRING " does not match the expected version (" COMPILER_NAME_STRING " %d.%d.%d)\n"
     "#endif\n", compiler_major * 10000 + compiler_minor * 100,
     /* Note that we don't use compiler_patchlevel when checking.
      * This assumes that code is portable between GCC a.b.x and a.b.y */
-    compiler_major, compiler_minor, compiler_patchlevel);
+    compiler_major < 5 ? "error" : "warning", compiler_major, compiler_minor, compiler_patchlevel);
 #elif defined(__SUNPRO_C)
   printf("\n"
     "#if __SUNPRO_CC != 0x%X\n"