Don't crash when an unknown language is specified with -x.

diff --git a/ccache.c b/ccache.c
index ac5f86b24e5695ccd35090b172a7a79ad4518538..ec53e75c9ac4958a9320545fdc868c548a522160 100644 (file)
--- a/ccache.c
+++ b/ccache.c
@@ -542,6 +542,7 @@ static const char *extension_for_language(const char *language)
        int i;
        const char *extension = getenv("CCACHE_EXTENSION");
        if (extension) return extension;
+       if (language == NULL) return NULL;
 
        for (i=0; extensions[i].extension; i++) {
                if (strcmp(language, extensions[i].language) == 0) {
@@ -1609,12 +1610,12 @@ static void process_args(int argc, char **argv, ARGS **preprocessor_args,
   if ((input_language == NULL) || (strcmp(input_language, "none") == 0)) {
     input_language = language_for_file(input_file);
   }
-  if (input_language == NULL) {
+  i_extension = extension_for_language(preprocessed_language(input_language, &direct_i_file));
+  if (i_extension == NULL) {
                cc_log("Not a C/C++ file: %s", input_file);
                stats_update(STATS_NOTC);
                failed();
   }
-  i_extension = extension_for_language(preprocessed_language(input_language, &direct_i_file));
 
        if (!found_c_opt) {
                cc_log("No -c option found");