Modern fixes (#697)

include/global.h

@@ -19,6 +19,10 @@
 #define asm_comment(x) asm volatile("@ -- " x " -- ")
 #define asm_unified(x) asm(".syntax unified\n" x "\n.syntax divided")
 
+#if __STDC_VERSION__ < 202311L
+#define asm __asm__
+#endif
+
 // IDE support
 #if defined(__APPLE__) || defined(__CYGWIN__) || defined(__INTELLISENSE__)
 // We define these when using certain IDEs to fool preproc
@@ -131,6 +135,13 @@ extern u8 gStringVar4[];
 #define NUM_FLAG_BYTES ROUND_BITS_TO_BYTES(FLAGS_COUNT)
 #define NUM_ADDITIONAL_PHRASE_BYTES ROUND_BITS_TO_BYTES(NUM_ADDITIONAL_PHRASES)
 
+// This returns the number of arguments passed to it (up to 8).
+#define NARG_8(...) NARG_8_(_, ##__VA_ARGS__, 8, 7, 6, 5, 4, 3, 2, 1, 0)
+#define NARG_8_(_, a, b, c, d, e, f, g, h, N, ...) N
+
+#define CAT(a, b) CAT_(a, b)
+#define CAT_(a, b) a ## b
+
 // This produces an error at compile-time if expr is zero.
 // It looks like file.c:line: size of array `id' is negative
 #define STATIC_ASSERT(expr, id) typedef char id[(expr) ? 1 : -1];