Like the error message already says, the source can not be compiled,
because it defines the type 'bool' and 'bool' is a keyword with
'-std=c23' onwards. To fix this we can either remove the typedef or
check if __STDC_VERSION__ < 202311L, see patch below. I tested this
patch on Ubuntu resolute.
--- a/module.h
+++ b/module.h
@@ -91,9 +91,11 @@
#include <assert.h>
// }}}
+#if !defined(__STDC_VERSION__) || (__STDC_VERSION__ < 202311L)
typedef int bool;
#define true 1
#define false 0
+#endif
enum Operator { // {{{
// Operators using the default metamethod.
