bug#32189: 27.0.50; GCC 7 warning due to -Wformat-truncation=2

[Ken Brown <kbrown@cornell.edu>]

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On 7/19/2018 9:29 AM, Eli Zaretskii wrote:
> If we need to jump through hoops to stop useless noise about perfectly
> valid code, we shouldn't have this warning in the first place.

The attached patch suppresses the warning.

Ken

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From e5efe43d9fa38ef10d88a4eaf88c5e7b8be9d5c8 Mon Sep 17 00:00:00 2001
From: Ken Brown <kbrown@cornell.edu>
Date: Thu, 19 Jul 2018 09:52:19 -0400
Subject: [PATCH] Avoid warnings with GCC 7

* configure.ac (nw): Suppress the -Wformat-truncation=2 option
due to too many false alarms with GCC 7.  (Bug#32189)
---
 configure.ac | 1 +
 1 file changed, 1 insertion(+)

diff --git a/configure.ac b/configure.ac
index b6918671e4..202c5621b1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -954,6 +954,7 @@ AC_DEFUN
 
   nw="$nw -Wcast-align -Wcast-align=strict" # Emacs is tricky with pointers.
   nw="$nw -Wduplicated-branches"    # Too many false alarms
+  nw="$nw -Wformat-truncation=2"    # Too many false alarms
   nw="$nw -Wformat-overflow=2"      # False alarms due to GCC bug 80776
   nw="$nw -Wsystem-headers"         # Don't let system headers trigger warnings
   nw="$nw -Woverlength-strings"     # Not a problem these days
-- 
2.17.0