From 3a32f5278d4048159272531db89f7be7026b2b94 Mon Sep 17 00:00:00 2001
From: Alejandro Colomar <alx@kernel.org>
Date: Fri, 2 Dec 2022 17:23:03 +0100
Subject: [PATCH] Assume strerror(3) exists
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ISO C99 requires strerror(3).

Link: <https://github.com/shadow-maint/shadow/pull/600>
Cc: Christian Göttsche <cgzones@googlemail.com>
Cc: Iker Pedrosa <ipedrosa@redhat.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Alejandro Colomar <alx@kernel.org>
---
 configure.ac  | 2 +-
 lib/defines.h | 1 -
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 32a162f1..7e473eaf 100644
--- a/configure.ac
+++ b/configure.ac
@@ -102,7 +102,7 @@ AC_TYPE_GETGROUPS
 AC_FUNC_UTIME_NULL
 AC_REPLACE_FUNCS(mkdir putgrent putpwent putspent rename rmdir)
 AC_REPLACE_FUNCS(sgetgrent sgetpwent sgetspent)
-AC_REPLACE_FUNCS(snprintf strcasecmp strdup strerror strstr)
+AC_REPLACE_FUNCS(snprintf strcasecmp strdup strstr)
 
 AC_CHECK_FUNC(setpgrp)
 AC_CHECK_FUNC(secure_getenv, [AC_DEFINE(HAS_SECURE_GETENV,
diff --git a/lib/defines.h b/lib/defines.h
index 74162f47..311bd7c4 100644
--- a/lib/defines.h
+++ b/lib/defines.h
@@ -250,7 +250,6 @@ static inline void memzero(void *ptr, size_t size)
 #ifdef sun			/* hacks for compiling on SunOS */
 # ifndef SOLARIS
 extern char *strdup ();
-extern char *strerror ();
 # endif
 #endif