Fix ccomps -? to actually print usage instead of error on macOS

Towards https://gitlab.com/graphviz/graphviz/-/issues/1852

diff --git a/cmd/tools/ccomps.c b/cmd/tools/ccomps.c
index 68f638997a0079f6d91204966a08e3291f3892aa..270df8d39079459928a4febe69be71ffafed3fbe 100644 (file)
--- a/cmd/tools/ccomps.c
+++ b/cmd/tools/ccomps.c
@@ -205,7 +205,7 @@ static void init(int argc, char *argv[])
                "ccomps: option -%c missing argument - ignored\n", optopt);
            break;
        case '?':
-           if (optopt == '\0')
+           if (optopt == '\0' || optopt == '?')
                usage(0);
            else {
                fprintf(stderr,