Allow optimization flags on make command line; all user to force no listing of tar files

Makefile

@@ -9,7 +9,8 @@ ifeq ($(CC),gcc)
 	LDFLAGS += -search_paths_first
 endif
 endif
-CFLAGS = $(patsubst %,-I%/include,$(LIBPREFIX)) -g -O0 -std=c99 \
+OPT = -g -O0
+CFLAGS = $(patsubst %,-I%/include,$(LIBPREFIX)) $(OPT) -std=c99 \
 	-Wall -Wno-unknown-pragmas
 
 CC = gcc

list.c

@@ -8,13 +8,27 @@
 int main(int argc, char **argv) {
     char *progname = argv[0];
     
+    bool tar = true;
+    int ch;
+    while ((ch = getopt(argc, argv, "t")) != -1) {
+        switch (ch) {
+            case 't':
+                tar = false;
+                break;
+            default:
+                die("Unknown option");
+        }
+    }
+    argc -= optind - 1;
+    argv += optind - 1;
+    
     if (argc == 1) {
         gInFile = stdin;
     } else if (argc == 2) {
         if (!(gInFile = fopen(argv[1], "r")))
             die("Can't open input file");
     } else {
-        die("Usage: %s [FILE]", progname);
+        die("Usage: %s -f [FILE]", progname);
     }
     
     decode_index();
@@ -26,7 +40,7 @@ int main(int argc, char **argv) {
             (uintmax_t)iter.block.uncompressed_size);
     }
     
-    if (read_file_index()) {
+    if (tar && read_file_index()) {
         printf("\n");
         dump_file_index(stdout);
         free_file_index();