From a49893f32ed20e109ba974dd74cd917c48c609e5 Mon Sep 17 00:00:00 2001
From: Oswald Buddenhagen <ossi@users.sf.net>
Date: Sat, 9 Nov 2013 13:50:48 +0100
Subject: [PATCH] fix strftime() %z conversion specifier check

only glibc does something sane with gmtime()+strftime(). on bsd (incl.
mac os), strftime() can be used only with localtime().
---
 configure.ac | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 479fff3..0c49a0c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -20,8 +20,8 @@ int main(void)
 {
     time_t t = 0;
     char buf[32];
-    strftime(buf, sizeof(buf), "%z", gmtime(&t));
-    return !!strcmp(buf, "+0000");
+    strftime(buf, sizeof(buf), "%z", localtime(&t));
+    return !(buf[0] == '+' || buf[0] == '-');
 }
 ], [ob_cv_strftime_z=yes], [ob_cv_strftime_z=no], [ob_cv_strftime_z="yes (assumed)"])])
 if test "x$ob_cv_strftime_z" = x"no"; then