From 7c8e2cc7aca1a789bbcf989a14be177d59041959 Mon Sep 17 00:00:00 2001
From: Harald Welte <laforge@gnumonks.org>
Date: Wed, 29 Aug 2012 16:47:30 +0200
Subject: libosmogsm: Back-port SMS related fixes from openbsc

This was fixed in 9c3dc90d16a40789081c84e46620f4d66689fec1 of
openbsc.git, after the sms code had been migrated here:
    introduce HAVE_TM_GMTOFF_IN_TM

    Not all architectures have the tm.tm_gmtoff member.  This fixes cygwin builds.
---
 configure.ac | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index 3e88a1b0..ca98fc2c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -39,6 +39,31 @@ AC_COMPILE_IFELSE([AC_LANG_SOURCE([char foo;])],
 CFLAGS="$saved_CFLAGS"
 AC_SUBST(SYMBOL_VISIBILITY)
 
+AC_DEFUN([CHECK_TM_INCLUDES_TM_GMTOFF], [
+  AC_CACHE_CHECK(
+    [whether struct tm has tm_gmtoff member],
+    osmo_cv_tm_includes_tm_gmtoff,
+    [AC_LINK_IFELSE([
+      AC_LANG_PROGRAM([
+        #include <time.h>
+      ], [
+        time_t t = time(NULL);
+        struct tm* lt = localtime(&t);
+        int off = lt->tm_gmtoff;
+      ])
+    ],
+    osmo_cv_tm_includes_tm_gmtoff=yes,
+    osmo_cv_tm_includes_tm_gmtoff=no
+    )]
+  )
+  if test "x$osmo_cv_tm_includes_tm_gmtoff" = xyes; then
+    AC_DEFINE(HAVE_TM_GMTOFF_IN_TM, 1,
+              [Define if struct tm has tm_gmtoff member.])
+  fi
+])
+
+CHECK_TM_INCLUDES_TM_GMTOFF
+
 dnl Generate the output
 AM_CONFIG_HEADER(config.h)
 
-- 
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