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configure.ac: fix configure tests broken with Clang 15 (implicit function declarations)

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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>
(cherry-picked from commit d0a3570300)
This commit is contained in:
Sam James 2022-09-12 18:02:21 +01:00 committed by Ozkan Sezer
parent 7be77f0b3d
commit 0680314c2a
1 changed files with 1 additions and 0 deletions
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configure.ac
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@ -2725,6 +2725,7 @@ 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;