From bbcf4320134efd8a01ce5a02bb9af62019ca05f6 Mon Sep 17 00:00:00 2001
From: Luca Ceresoli <luca@lucaceresoli.net>
Date: Tue, 4 Feb 2020 15:57:48 +0100
Subject: [PATCH] exim_lock: fix lstat-related build errors

exim_lock fails to cross-compile with the Sourcery CodeBench ARM 2014.05
toolchain due the a missing include of sys/types.h, needed for the
constants used by fstat() and lstat().

Discovered when cross-compiling with the Buildroot embedded Linux
buildsystem.

Fixes:

  exim_lock.c:427:30: error: 'S_IFMT' undeclared (first use in this function)
         if ((statbuf.st_mode & S_IFMT) == S_IFLNK)
                                ^
  exim_lock.c:427:30: note: each undeclared identifier is reported only once for each function it appears in
  exim_lock.c:427:41: error: 'S_IFLNK' undeclared (first use in this function)
         if ((statbuf.st_mode & S_IFMT) == S_IFLNK)
                                           ^

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Upstream-status: https://bugs.exim.org/show_bug.cgi?id=2523
---
 src/exim_lock.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/exim_lock.c b/src/exim_lock.c
index 068216816054..cb140aff6436 100644
--- a/src/exim_lock.c
+++ b/src/exim_lock.c
@@ -13,6 +13,8 @@ Argument: the name of the lock file
 Copyright (c) The Exim Maintainers 2016
 */

+#define _XOPEN_SOURCE
+
 #include "os.h"

 #include <stdio.h>
@@ -26,6 +28,7 @@ Copyright (c) The Exim Maintainers 2016
 #include <unistd.h>
 #include <utime.h>
 #include <sys/utsname.h>
+#include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/file.h>
 #include <pwd.h>
--
2.25.0