From: Francois-Xavier Le Bail <fx.lebail@yahoo.com>
Date: Tue, 28 Apr 2015 04:17:16 +0000 (+0200)
Subject: netdissect.h: Add a comment on IS_NOT_NEGATIVE macro
X-Git-Tag: tcpdump-4.8.0~268
X-Git-Url: https://git.tcpdump.org/tcpdump/commitdiff_plain/79bfaef492707e42eafa532625cb5f3698c3bba4

netdissect.h: Add a comment on IS_NOT_NEGATIVE macro
---

diff --git a/netdissect.h b/netdissect.h
index 9e369a99..0bf80c16 100644
--- a/netdissect.h
+++ b/netdissect.h
@@ -271,6 +271,11 @@ struct netdissect_options {
  *	http://www.kb.cert.org/vuls/id/162289
  */
 
+/*
+ * Test in two parts to avoid these warnings:
+ * comparison of unsigned expression >= 0 is always true [-Wtype-limits],
+ * comparison is always true due to limited range of data type [-Wtype-limits].
+ */
 #define IS_NOT_NEGATIVE(x) (((x) > 0) || ((x) == 0))
 
 #define ND_TTEST2(var, l) \