Fix absence of 'system' in iOS
Despite claiming to be ISO, the C library in some Apple platforms
does not implement 'system'.
diff --git a/loslib.c b/loslib.c
index 854dcf6..7eb05ca 100644
--- a/loslib.c
+++ b/loslib.c
@@ -138,12 +138,28 @@
/* }================================================================== */
+/*
+** Despite claiming to be ISO, the C library in some Apple platforms
+** does not implement 'system'.
+*/
+#if !defined(l_system) && defined(__APPLE__) /* { */
+#include "TargetConditionals.h"
+#if TARGET_OS_IOS || TARGET_OS_WATCH || TARGET_OS_TV
+#define l_system(cmd) ((cmd) == NULL ? 0 : -1)
+#endif
+#endif /* } */
+
+#if !defined(l_system)
+#define l_system(cmd) system(cmd) /* default definition */
+#endif
+
+
static int os_execute (lua_State *L) {
const char *cmd = luaL_optstring(L, 1, NULL);
int stat;
errno = 0;
- stat = system(cmd);
+ stat = l_system(cmd);
if (cmd != NULL)
return luaL_execresult(L, stat);
else {
