From 7b961e40ee5cd5c453cad70906327ea5a11fa75e Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Mon, 25 Dec 2017 12:35:28 +0100
Subject: [PATCH] meson: look for gettid() definition where getpid() is defined

Hopefully, should gettid() show up one day in glibc it'll show up where
getpid() is defined too.
---
 meson.build | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/meson.build b/meson.build
index 9911afb0e7e..9fc45abc027 100644
--- a/meson.build
+++ b/meson.build
@@ -455,7 +455,8 @@ endforeach
 
 foreach ident : [
         ['memfd_create',      '''#include <sys/mman.h>'''],
-        ['gettid',            '''#include <sys/types.h>'''],
+        ['gettid',            '''#include <sys/types.h>
+                                 #include <unistd.h>'''],
         ['pivot_root',        '''#include <stdlib.h>
                                  #include <unistd.h>'''],     # no known header declares pivot_root
         ['name_to_handle_at', '''#include <sys/types.h>