From d0a3570300812bc81888e7a7eadb9311621dc9a7 Mon Sep 17 00:00:00 2001
From: Sam James <sam@gentoo.org>
Date: Mon, 12 Sep 2022 18:02:21 +0100
Subject: [PATCH] configure.ac: fix configure tests broken with Clang 15
 (implicit function declarations)

Clang 15 makes implicit function declarations fatal by default which
leads to some configure tests silently failing/returning
the wrong result.

Signed-off-by: Sam James <sam@gentoo.org>
---
 configure.ac | 1 +
 1 file changed, 1 insertion(+)

diff --git a/configure.ac b/configure.ac
index d27fa9ad36..ca26437760 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2728,6 +2728,7 @@ CheckInputKD()
     AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
       #include <linux/kd.h>
       #include <linux/keyboard.h>
+      #include <sys/ioctl.h>
     ]], [[
         struct kbentry kbe;
         kbe.kb_table = KG_CTRL;