Add MIN() compatibility macro

commit 3b23b18dddb8f8f4a introduced usage of MIN(), and not all platforms
have the macro in "readily usable" system header files, most notably it's
missing on OpenSolaris and Android.  Add macro if not defined yet.

Signed-off-by: Gert Doering <gert@greenie.muc.de>
Acked-by: Arne Schwabe <arne@rfc2549.org>
Message-Id: <20130323112234.GM17727@greenie.muc.de>
URL: http://article.gmane.org/gmane.network.openvpn.devel/7450
(cherry picked from commit 15ca5c297b556fbbfdee6152af26ee158222614f)

diff --git a/src/openvpn/syshead.h b/src/openvpn/syshead.h
index b14214dd03544a0d6a847dd78745d308ea7d4525..4db29cc311fde77e822a804e7b1bbf1999dc80fa 100644 (file)
--- a/src/openvpn/syshead.h
+++ b/src/openvpn/syshead.h
@@ -398,6 +398,13 @@
 #define HAVE_GETTIMEOFDAY_NANOSECONDS 1
 #endif
 
+/*
+ * do we have the MIN() macro?
+ */
+#ifndef MIN
+#define MIN(a,b) (((a)<(b))?(a):(b))
+#endif
+
 /*
  * Do we have the capability to report extended socket errors?
  */