commit - b4b686415dcb5ffd64a48d04ad5576de54958eaf
commit + 20e8b903e1a4cc40922318f5378775cb4cf178b2
blob - e5aeae502fff78eade97117e9c1ada2aeddd18f6
blob + 0a696ceb5067bea9c39eefe30424969c508ec223
--- include/u.h
+++ include/u.h
@@ -10,14 +10,14 @@ extern "C" {
 #define _BSD_SOURCE 1
 #define _NETBSD_SOURCE 1	/* NetBSD */
 #define _SVID_SOURCE 1
-#ifndef __APPLE__
+#if !defined(__APPLE__) && !defined(__OpenBSD__)
 #	define _XOPEN_SOURCE 1000
 #	define _XOPEN_SOURCE_EXTENDED 1
 #endif
 #define _LARGEFILE64_SOURCE 1
 #define _FILE_OFFSET_BITS 64
 
-#include <stdint.h>
+#include <inttypes.h>
 
 #include <unistd.h>
 #include <string.h>
@@ -95,9 +95,11 @@ typedef long p9jmp_buf[sizeof(sigjmp_buf)/sizeof(long)
 #	undef _NEEDULONG
 #elif defined(__OpenBSD__)
 #	include <sys/types.h>
+#	include <pthread.h>
 #	undef _NEEDUSHORT
 #	undef _NEEDUINT
 #	undef _NEEDULONG
+#	define PLAN9PORT_USING_PTHREADS 1
 #else
 	/* No idea what system this is -- try some defaults */
 #	include <pthread.h>