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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>
This commit is contained in:
Sam James 2022-09-12 18:02:21 +01:00 committed by Sam Lantinga
parent 7f415ce587
commit d0a3570300
1 changed files with 1 additions and 0 deletions
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configure.ac
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@ -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;