From 96ae9a2e92309221fe02febb5964596df7a56525 Mon Sep 17 00:00:00 2001
From: Kees Monshouwer <mind04@monshouwer.org>
Date: Thu, 10 Jul 2014 19:23:04 +0200
Subject: [PATCH] detect presense of tm_gmtoff in tm structure and add
 conditional build logic in yahttp

---
 configure.ac                           |  2 ++
 m4/tm-gmtoff.m4                        | 13 +++++++++++++
 pdns/ext/yahttp/yahttp/utility.hpp     |  6 ++++++
 pdns/ext/yahttp/yahttp/yahttp-config.h |  3 +--
 4 files changed, 22 insertions(+), 2 deletions(-)
 create mode 100644 m4/tm-gmtoff.m4

diff --git a/configure.ac b/configure.ac
index ad8da5e136..64db4a28c4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -33,6 +33,8 @@ AC_PROG_LIBTOOL([disable-static])
 LT_INIT([disable-static])
 ])
 
+MC_TM_GMTOFF
+
 AM_CONDITIONAL([RELEASE_BUILD], [test "$PACKAGE_VERSION" != "git"])
 
 # Define full_libdir to be the fully expanded (${exec_prefix}, etc.)
diff --git a/m4/tm-gmtoff.m4 b/m4/tm-gmtoff.m4
new file mode 100644
index 0000000000..71742aff9a
--- /dev/null
+++ b/m4/tm-gmtoff.m4
@@ -0,0 +1,13 @@
+dnl Check for the tm_gmtoff field in struct tm
+dnl (Borrowed from the Gaim project)
+
+AC_DEFUN([MC_TM_GMTOFF],
+[AC_REQUIRE([AC_STRUCT_TM])dnl
+AC_CACHE_CHECK([for tm_gmtoff in struct tm], ac_cv_struct_tm_gmtoff,
+[AC_TRY_COMPILE([#include <sys/types.h>
+#include <$ac_cv_struct_tm>], [struct tm tm; tm.tm_gmtoff;],
+  ac_cv_struct_tm_gmtoff=yes, ac_cv_struct_tm_gmtoff=no)])
+if test "$ac_cv_struct_tm_gmtoff" = yes; then
+  AC_DEFINE(HAVE_TM_GMTOFF, 1, [tm_gmtoff is available.])
+fi
+])
diff --git a/pdns/ext/yahttp/yahttp/utility.hpp b/pdns/ext/yahttp/yahttp/utility.hpp
index 08b2c6f453..e2d8c62e5a 100644
--- a/pdns/ext/yahttp/yahttp/utility.hpp
+++ b/pdns/ext/yahttp/yahttp/utility.hpp
@@ -72,7 +72,11 @@ namespace YaHTTP {
        minutes = tm->tm_min;
        seconds = tm->tm_sec;
        wday = tm->tm_wday;
+#ifdef HAVE_TM_GMTOFF
        utc_offset = tm->tm_gmtoff;
+#else
+       utc_offset = 0;
+#endif
        isSet = true;
      }; //<! parses date from struct tm 
 
@@ -138,7 +142,9 @@ namespace YaHTTP {
        tm.tm_hour = hours;
        tm.tm_min = minutes;
        tm.tm_sec = seconds;
+#ifdef HAVE_TM_GMTOFF
        tm.tm_gmtoff = utc_offset;
+#endif
        return mktime(&tm);
      }; //<! returns this datetime as unixtime. will not work for dates before 1970/1/1 00:00:00 GMT
   };
diff --git a/pdns/ext/yahttp/yahttp/yahttp-config.h b/pdns/ext/yahttp/yahttp/yahttp-config.h
index 8241f201f1..0e84fa0e8f 100644
--- a/pdns/ext/yahttp/yahttp/yahttp-config.h
+++ b/pdns/ext/yahttp/yahttp/yahttp-config.h
@@ -1,2 +1 @@
-/* config header for embedded libyahttp */
-#define HAVE_BOOST 1
+#include "../../../../config.h"
-- 
2.47.2