https://gitlab.freedesktop.org/accountsservice/accountsservice/-/commit/453f893e3c38c209ae9dff47bca74ccb33a5bd34

From 453f893e3c38c209ae9dff47bca74ccb33a5bd34 Mon Sep 17 00:00:00 2001
From: Sam James <sam@gentoo.org>
Date: Tue, 28 Feb 2023 02:31:50 +0000
Subject: [PATCH] meson.build: fix -Wimplicit-function-declaration in configure
 tests for printf

<stdio.h> needs to be included for printf. Newer compilers like Clang 16 make
implicit function declarations an error by default which can cause misleading
or incorrect configure test results.

Signed-off-by: Sam James <sam@gentoo.org>
--- a/meson.build
+++ b/meson.build
@@ -79,6 +79,7 @@ endforeach
 
 if cc.has_header_symbol('utmpx.h', 'WTMPX_FILENAME', prefix: '#define _GNU_SOURCE')
   code = '''#define _GNU_SOURCE
+  #include <stdio.h>
   #include <utmpx.h>
   int main (int argc, char **argv) {
     printf ("%s\n", WTMPX_FILENAME);
@@ -91,6 +92,7 @@ if cc.has_header_symbol('utmpx.h', 'WTMPX_FILENAME', prefix: '#define _GNU_SOURC
   config_h.set('PATH_WTMP', 'WTMPX_FILENAME')
 elif cc.has_header_symbol('paths.h', '_PATH_WTMPX')
   code = '''#include <paths.h>
+  #include <stdio.h>
   int main (int argc, char **argv) {
     printf ("%s\n", _PATH_WTMPX);
     return 0;
-- 
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