From db221f9705a8e80213c0dc9027b86b036893ef66 Mon Sep 17 00:00:00 2001
From: Rob Gowin <rob.gowin@gmail.com>
Date: Mon, 25 Jul 2022 08:51:18 -0400
Subject: [PATCH] Changes to compile on macOS.

defines.h:
  Use (defined(__APPLE__) && defined(__MACH__)) to
  detect macOS, as suggested by https://stackoverflow.com/questions/7063303/macro-unix-not-defined-in-macos-x.
  Combined with __NetBSD__ to set BSD=1 and POSIX=1.

main.c:
  Include <unistd.h> to pick up sleep() declaration.
---
 defines.h | 4 ++--
 main.c    | 1 +
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/defines.h b/defines.h
index 1b328a4..dce2d05 100644
--- a/defines.h
+++ b/defines.h
@@ -2,9 +2,9 @@
 #ifndef __DEFINES_H__
 #define __DEFINES_H__
 
-#if __unix__
+#if __unix__ || (defined(__APPLE__) && defined(__MACH__))
 # define UNIX 1
-# if __NetBSD__
+# if __NetBSD__ || (defined(__APPLE__) && defined(__MACH__))
 #  define BSD 1
 #  define POSIX 1
 # elif __linux__
diff --git a/main.c b/main.c
index 413dad1..dc3344f 100644
--- a/main.c
+++ b/main.c
@@ -69,6 +69,7 @@
 #include "defines.h"	/* OS specific customization */
 #if UNIX
 # include <signal.h>
+# include <unistd.h>
 #endif
 
 #include "basic.h"