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https://github.com/tomac/yersinia/commit/867b309eced9e02b63412855440cd4f5f7727431
From 5db403f8aa4101589f33246eaa23b5f31228fc3b Mon Sep 17 00:00:00 2001
From: Sam James <sam@gentoo.org>
Date: Sat, 19 Nov 2022 18:43:26 +0000
Subject: [PATCH] configure: fix -Wimplicit-function-declaration,
-Wimplicit-int
Clang 16 makes -Wimplicit-function-declaration and -Wimplicit-int errors by default. Unfortunately,
this can lead to misconfiguration or miscompilation of software as configure
tests may then return the wrong result.
For more information, see LWN.net [0] or LLVM's Discourse [1], the Gentoo wiki [2],
or the (new) c-std-porting mailing list [3].
[0] https://lwn.net/Articles/913505/
[1] https://discourse.llvm.org/t/configure-script-breakage-with-the-new-werror-implicit-function-declaration/65213
[2] https://wiki.gentoo.org/wiki/Modern_C_porting
[3] hosted at lists.linux.dev.
Followup to 6414681ae99d6a0f460f827648f114aa3cb2e419.
Signed-off-by: Sam James <sam@gentoo.org>
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -79,8 +79,10 @@ AC_DEFUN([AC_LBL_UNALIGNED_ACCESS],
# include <sys/types.h>
# include <sys/wait.h>
# include <stdio.h>
+# include <stdlib.h>
+# include <unistd.h>
unsigned char a[[5]] = { 1, 2, 3, 4, 5 };
- main() {
+ int main(void) {
unsigned int i;
pid_t pid;
int status;
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