Allow to disable warnings from command line in yarac

yarac.c

@@ -41,11 +41,15 @@ limitations under the License.
 #endif
 
 
+int show_warnings = TRUE;
+
+
 void show_help()
 {
   printf("usage:  yarac [OPTION]... [RULE_FILE]... OUTPUT_FILE\n");
   printf("options:\n");
   printf("  -d <identifier>=<value>   define external variable.\n");
+  printf("  -w                        disable warnings.\n");
   printf("  -v                        show version information.\n");
   printf("\nReport bugs to: <%s>\n", PACKAGE_BUGREPORT);
 }
@@ -74,14 +78,18 @@ int process_cmd_line(
   char c;
   opterr = 0;
 
-  while ((c = getopt (argc, (char**) argv, "vd:")) != -1)
+  while ((c = getopt (argc, (char**) argv, "wvd:")) != -1)
   {
     switch (c)
     {
       case 'v':
         printf("%s\n", PACKAGE_STRING);
         return 0;
 
+      case 'w':
+        show_warnings = FALSE;
+        break;
+
       case 'd':
         equal_sign = strchr(optarg, '=');
 
@@ -142,9 +150,14 @@ void report_error(
     const char* message)
 {
   if (error_level == YARA_ERROR_LEVEL_ERROR)
+  {
     fprintf(stderr, "%s(%d): error: %s\n", file_name, line_number, message);
+  }
   else
-    fprintf(stderr, "%s(%d): warning: %s\n", file_name, line_number, message);
+  {
+    if (show_warnings)
+      fprintf(stderr, "%s(%d): warning: %s\n", file_name, line_number, message);
+  }
 }