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Declare snprintf to fix builds on macOS

For some reason on macOS, the functions `snprintf` and `vsnprintf` are
not in the X/Open 5 (ANSI C89) standard but rather in the X/Open
6 (ISO C99). A simplest solution seems to be to declaring the missing
functions before using them, which is what I did here. Another option
is to use the C99 standard with `#define _XOPEN_SOURCE 600`, which
seems to be an overkill for such a niche issue.

Quoting from the STANDARDS section in `man 3 snprintf` on macOS:

> ...the snprintf() and vsnprintf() functions conform to ISO/IEC
> 9899:1999 (“ISO C99”)...

Matus Laslofi authored on 01/05/2023 05:42:45 • Devine Lu Linvega committed on 01/05/2023 16:27:49
Showing 1 changed files

src/devices/file.c index a208b8f..bc7c4fd 100644

src/devices/file.c

History View file @ d2e0543

@@ -26,6 +26,10 @@
                      #define PATH_MAX 4096
                      #endif
                     +#ifdef __APPLE__
                     +int snprintf(char *, unsigned long, const char *, ...);
                     +#endif
+                    +
                      #include "../uxn.h"
                      #include "file.h"