From 7c71ddadecc070d80d6335dc58ce6790ad478f58 Mon Sep 17 00:00:00 2001
From: Florian Weimer <fweimer@redhat.com>
Date: Tue, 7 Feb 2023 16:10:36 +0100
Subject: [PATCH] linebreak: Avoid implicit declaration of u8_mbtouc_unsafe
 function

GNULIB_UNISTR_U8_MBTOUC_UNSAFE tells the bundled unistr.h to
provide a function prototype for u8_mbtouc_unsafe.  This prevents
build failures with future compilers which do not support implicit
function declarations.

Upstream gnulib has split the linebreak module into multiple parts;
it is hard to tell if it still has the same issue.
---
 src/linebreak/linebreak.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/linebreak/linebreak.c b/src/linebreak/linebreak.c
index 6b0bf66..1fb2a29 100644
--- a/src/linebreak/linebreak.c
+++ b/src/linebreak/linebreak.c
@@ -35,6 +35,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 //#include "c-ctype.h"
 #include "ctype.h"
 #include "xsize.h"
+#define GNULIB_UNISTR_U8_MBTOUC_UNSAFE
 #include "unistr.h"
 #include "uniwidth.h"
 #include "uniwidth/cjk.h"