From dcffeb632efc17709d1b6ba491c00b520d398e5a Mon Sep 17 00:00:00 2001
From: Brad Smith <brad@comstyle.com>
Date: Tue, 7 Sep 2021 08:11:52 -0400
Subject: [PATCH] Do not unconditionally define unix on OpenBSD. (#85)

This resolves a warning that popped up when we switched to Clang as
Clang defines unix in addition to __unix__ unlike GCC.
---
 src/engine/jam.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/engine/jam.h b/src/engine/jam.h
index 93cdaf19e..34a6fbeaa 100644
--- a/src/engine/jam.h
+++ b/src/engine/jam.h
@@ -328,7 +328,9 @@
 #ifdef __OpenBSD__
     #define OSMINOR "OS=OPENBSD"
     #define OS_OPENBSD
-    #define unix
+    #ifndef unix
+        #define unix
+    #endif
 #endif
 #if defined (__FreeBSD_kernel__) && !defined(__FreeBSD__)
     #define OSMINOR "OS=KFREEBSD"