diff --git a/configure.ac b/configure.ac
index 29e97e7..00687a6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -85,16 +85,26 @@ LIBS_OLD=$LIBS
 # Search for dlsym function, which is used in tests. Linux needs -ldl,
 # but netbsd does not need it.
 AC_SEARCH_LIBS([dlsym], [dl])
-TESTS_LIBS=$LIBS $TESTS_LIBS
+TESTS_LIBS="$LIBS $TESTS_LIBS"
 LIBS=$LIBS_OLD
 
 LIBS_OLD=$LIBS
 AC_SEARCH_LIBS([clock_gettime], [rt],
                [AC_DEFINE([HAVE_CLOCK_GETTIME], [1],
                           [Define to 1 if you have the `clock_gettime`.])])
-SRC_LIBS=$LIBS $SRC_LIBS
+SRC_LIBS="$LIBS $SRC_LIBS"
 LIBS=$LIBS_OLD
 
+case "$host" in
+  *android*)
+    # android does not need -pthread, but needs followng 2 libs for C++
+    SRC_LIBS="$SRC_LIBS -lstdc++ -lsupc++"
+    ;;
+  *)
+    SRC_LIBS="$SRC_LIBS -pthread"
+    ;;
+esac
+
 # zlib
 PKG_CHECK_MODULES([ZLIB], [zlib >= 1.2.3])
 LIBS="$ZLIB_LIBS $LIBS"
@@ -211,6 +221,7 @@ AC_CHECK_FUNCS([ \
   getpwnam \
   memmove \
   memset \
+  timegm \
 ])
 
 AX_HAVE_EPOLL([have_epoll=yes], [have_epoll=no])
diff --git a/src/Makefile.am b/src/Makefile.am
index a819abf..d0aac3e 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -26,8 +26,8 @@ if ENABLE_SRC
 AM_CFLAGS = -Wall
 AM_CPPFLAGS = -Wall -I$(srcdir)/../lib/includes -I$(builddir)/../lib/includes \
 	@OPENSSL_CFLAGS@ @XML_CPPFLAGS@ @LIBEVENT_OPENSSL_CFLAGS@ @DEFS@
-AM_LDFLAGS = @OPENSSL_LIBS@ @XML_LIBS@ @LIBEVENT_OPENSSL_LIBS@ @SRC_LIBS@ \
-	-pthread
+AM_LDFLAGS = @OPENSSL_LIBS@ @XML_LIBS@ @LIBEVENT_OPENSSL_LIBS@ @SRC_LIBS@
+
 LDADD = $(top_builddir)/lib/libspdylay.la
 
 bin_PROGRAMS = spdycat spdyd
@@ -38,8 +38,8 @@ if HAVE_LIBEVENT_OPENSSL
 bin_PROGRAMS += shrpx
 endif # HAVE_LIBEVENT_OPENSSL
 
-HELPER_OBJECTS = util.cc spdylay_ssl.cc
-HELPER_HFILES = util.h spdylay_ssl.h spdylay_config.h
+HELPER_OBJECTS = util.cc timegm.c spdylay_ssl.cc
+HELPER_HFILES = util.h timegm.h spdylay_ssl.h spdylay_config.h
 
 EVENT_OBJECTS =
 EVENT_HFILES = EventPoll.h EventPollEvent.h
@@ -75,7 +75,7 @@ spdyd_SOURCES = ${HELPER_OBJECTS} ${HELPER_HFILES} \
 
 if HAVE_LIBEVENT_OPENSSL
 SHRPX_SRCS = \
-	util.cc util.h base64.h \
+	util.cc util.h timegm.c timegm.h base64.h \
 	shrpx_config.cc shrpx_config.h \
 	shrpx_error.h \
 	shrpx_listen_handler.cc shrpx_listen_handler.h \
diff --git a/src/timegm.c b/src/timegm.c
new file mode 100644
index 0000000..cbc158f
--- /dev/null
+++ b/src/timegm.c
@@ -0,0 +1,75 @@
+/*
+ * Spdylay - SPDY Library
+ *
+ * Copyright (c) 2013 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "timegm.h"
+
+#ifndef HAVE_TIMEGM
+
+#include <stdint.h>
+
+/* Counter the number of leap year in the range [0, y). The |y| is the
+   year, including century (e.g., 2012) */
+static int count_leap_year(int y)
+{
+  y -= 1;
+  return y/4-y/100+y/400;
+}
+
+/* Returns nonzero if the |y| is the leap year. The |y| is the year,
+   including century (e.g., 2012) */
+static int is_leap_year(int y)
+{
+  return y%4 == 0 && (y%100 != 0 || y%400 == 0);
+}
+
+/* The number of days before ith month begins */
+static int daysum[] = {
+  0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
+};
+
+/* Based on the algorithm of Python 2.7 calendar.timegm. */
+time_t timegm(struct tm *tm)
+{
+  int days;
+  int num_leap_year;
+  int64_t t;
+  if(tm->tm_mon > 11) {
+    return -1;
+  }
+  num_leap_year = count_leap_year(tm->tm_year + 1900) - count_leap_year(1970);
+  days = (tm->tm_year - 70) * 365 +
+    num_leap_year + daysum[tm->tm_mon] + tm->tm_mday-1;
+  if(tm->tm_mon >= 2 && is_leap_year(tm->tm_year + 1900)) {
+    ++days;
+  }
+  t = ((int64_t)days * 24 + tm->tm_hour) * 3600 + tm->tm_min * 60 + tm->tm_sec;
+  if(sizeof(time_t) == 4) {
+    if(t < INT32_MIN || t > INT32_MAX) {
+      return -1;
+    }
+  }
+  return t;
+}
+
+#endif /* !HAVE_TIMEGM */
diff --git a/src/timegm.h b/src/timegm.h
new file mode 100644
index 0000000..231d145
--- /dev/null
+++ b/src/timegm.h
@@ -0,0 +1,48 @@
+/*
+ * Spdylay - SPDY Library
+ *
+ * Copyright (c) 2013 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef TIMEGM_H
+#define TIMEGM_H
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif // HAVE_CONFIG_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#include <time.h>
+
+#ifndef HAVE_TIMEGM
+
+time_t timegm(struct tm *tm);
+
+#endif /* HAVE_TIMEGM */
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* TIMEGM_H */
diff --git a/src/util.cc b/src/util.cc
index 1a3235a..9984142 100644
--- a/src/util.cc
+++ b/src/util.cc
@@ -29,6 +29,8 @@
 #include <cstdio>
 #include <cstring>
 
+#include "timegm.h"
+
 namespace spdylay {
 
 namespace util {