Fix macOS posix_spawn_file_actions_addchdir availability handling

Author: arshidkv12

ext/standard/proc_open.c

@@ -47,15 +47,23 @@
 #define USE_POSIX_SPAWN
 
 /* The non-_np variant is in macOS 26 (and _np deprecated) */
-# if defined(MAC_OS_X_VERSION_MIN_REQUIRED) && MAC_OS_X_VERSION_MIN_REQUIRED >= 260000
-	#define POSIX_SPAWN_FILE_ACTIONS_ADDCHDIR posix_spawn_file_actions_addchdir
-# else
-	#define POSIX_SPAWN_FILE_ACTIONS_ADDCHDIR posix_spawn_file_actions_addchdir_np
-# endif
+#if defined(__APPLE__)  && MAC_OS_X_VERSION_MIN_REQUIRED <= 260000
+
+#define POSIX_SPAWN_FILE_ACTIONS_ADDCHDIR posix_spawn_file_actions_addchdir_np
+
+#elif defined(__APPLE__) && defined(MAC_OS_X_VERSION_MIN_REQUIRED) && MAC_OS_X_VERSION_MIN_REQUIRED >= 26000
+
+#define POSIX_SPAWN_FILE_ACTIONS_ADDCHDIR posix_spawn_file_actions_addchdir
+
 #elif defined(HAVE_POSIX_SPAWN_FILE_ACTIONS_ADDCHDIR)
-	#define POSIX_SPAWN_FILE_ACTIONS_ADDCHDIR posix_spawn_file_actions_addchdir
+
+#define POSIX_SPAWN_FILE_ACTIONS_ADDCHDIR posix_spawn_file_actions_addchdir
+
 #else
-	#define POSIX_SPAWN_FILE_ACTIONS_ADDCHDIR posix_spawn_file_actions_addchdir_np
+
+#define POSIX_SPAWN_FILE_ACTIONS_ADDCHDIR posix_spawn_file_actions_addchdir_np
+
+#endif
 #endif