From: Pádraig Brady <P@draigBrady.com>
Date: Thu, 18 May 2023 10:40:19 +0000 (+0100)
Subject: build: gnulib: avoid false -Wstringop-overflow warning
X-Git-Tag: v9.4~131
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=aed3b8190aca198ac4ef7f7951ee67da61569598;p=thirdparty%2Fcoreutils.git

build: gnulib: avoid false -Wstringop-overflow warning

Tested on gcc 13.1.1 with: make CFLAGS='-O0 -ggdb'

* configure.ac: Disable -Wstringop-overflow for gnulib.
This warning is far too problematic in my experience:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88443
and triggers with gcc -O0 with versions 12,13 at least.
---

diff --git a/configure.ac b/configure.ac
index f61076d2b9..27e7431576 100644
--- a/configure.ac
+++ b/configure.ac
@@ -261,6 +261,11 @@ if test $gl_gcc_warnings != no; then
   # FP in careadlinkat.c w/gcc 10.0.1 20200205
   gl_WARN_ADD([-Wno-return-local-addr])
 
+  # FIXME: remove this line when gcc improves
+  # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88443
+  # FP wth -O0 in nstrftime.c w/gcc 12, and 13 at least
+  gl_WARN_ADD([-Wno-stringop-overflow])
+
   gl_MANYWARN_COMPLEMENT([GNULIB_WARN_CFLAGS], [$WARN_CFLAGS], [$nw])
   AC_SUBST([GNULIB_WARN_CFLAGS])