1 files changed, 12 insertions, 0 deletions
diff --git a/compatibility.c b/compatibility.c
new file mode 100644
index 0000000..705bd07
--- /dev/null
+++ b/compatibility.c
@@ -0,0 +1,12 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(void) {
+	int *p;
+	memset(&p, 0, sizeof p);
+	if (p) {
+		fprintf(stderr, "You cannot run toc. Sorry.\n");
+		return EXIT_FAILURE;
+	}
+	return EXIT_SUCCESS;
+}