bail out if we get -M

diff --git a/ccache.c b/ccache.c
index 05f54694d88f7b289578dc191590f962223d3eac..d1c67e13219d88e2b29995140b4929170df33b3a 100644 (file)
--- a/ccache.c
+++ b/ccache.c
@@ -371,8 +371,9 @@ static void process_args(int argc, char **argv)
        args_add(stripped_args, argv[0]);
 
        for (i=1; i<argc; i++) {
-               /* -E will never work ... */
-               if (strcmp(argv[i], "-E") == 0) {
+               /* some options will never work ... */
+               if (strncmp(argv[i], "-E", 2) == 0 ||
+                   strncmp(argv[i], "-M", 2) == 0) {
                        failed();
                }