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 f61076d2b9d854b8160ae606c00308c383600f17..27e7431576c672c2234dc96e5014ac32a19152eb 100644 (file)
--- 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])