From e9d0b5b022df172d3615e9e2875506c74e6d7cd1 Mon Sep 17 00:00:00 2001
From: Luca Ceresoli <luca@lucaceresoli.net>
Date: Wed, 5 Feb 2020 17:13:57 +0100
Subject: [PATCH] sieve: fix build errors

sieve fails to cross-compile with the Sourcery CodeBench ARM 2014.05
toolchain with a huge number of errors, including:

  .../sysroot/usr/include/arpa/nameser.h:115:2: error: unknown type name 'u_char'
    const u_char *_msg, *_eom;
    ^
  .../sysroot/usr/include/arpa/nameser.h:474:1: error: unknown type name 'u_long'
   u_long  ns_get32 (const u_char *) __THROW;
   ^
  .../sysroot/usr/include/arpa/nameser.h:475:31: error: expected ')' before '*' token
   void  ns_put16 (u_int, u_char *) __THROW;
                                 ^

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

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Upstream: https://bugs.exim.org/show_bug.cgi?id=2523
[Bernd: rebased for version 4.97.1]
Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
---
 src/sieve.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/sieve.c b/src/sieve.c
index 5e8d1e6f4776..9632f2d43810 100644
--- a/src/sieve.c
+++ b/src/sieve.c
@@ -14,6 +14,8 @@

 /* Sieve mail filter. */

+#define _BSD_SOURCE
+
 #include <ctype.h>
 #include <errno.h>
 #include <limits.h>
--
2.25.0