1 files changed, 27 insertions, 1 deletions

diff --git a/configure.ac b/configure.ac
index 8394997..5f99d95 100644
--- a/configure.ac
+++ b/configure.ac
@@ -56,7 +56,7 @@ AC_TYPE_UINT32_T
 AC_TYPE_UINT8_T
 
 # Checks for library functions.
-AC_CHECK_FUNCS([asprintf strcasecmp strdup strerror strndup stpcpy vasprintf])
+AC_CHECK_FUNCS([asprintf strcasecmp strdup strerror strndup stpcpy vasprintf gmtime_r localtime_r timegm])
 
 # Checking endianness
 AC_C_BIGENDIAN([AC_DEFINE([__BIG_ENDIAN__], [1], [big endian])],
@@ -78,6 +78,32 @@ case ${host_os} in
 esac
 AM_CONDITIONAL(WIN32, test x$win32 = xtrue)
 
+# Check if struct tm has a tm_gmtoff member
+AC_CACHE_CHECK(for tm_gmtoff in struct tm, ac_cv_struct_tm_gmtoff,
+        AC_TRY_COMPILE([
+                #include <time.h>
+        ], [
+                struct tm tm;
+                tm.tm_gmtoff = 1;
+        ], ac_cv_struct_tm_gmtoff=yes, ac_cv_struct_tm_gmtoff=no))
+
+if (test "$ac_cv_struct_tm_gmtoff" = "yes"); then
+        AC_DEFINE(HAVE_TM_TM_GMTOFF, 1, [Define if struct tm has a tm_gmtoff member])
+fi
+
+# Check if struct tm has a tm_zone member
+AC_CACHE_CHECK(for tm_zone in struct tm, ac_cv_struct_tm_zone,
+        AC_TRY_COMPILE([
+                #include <time.h>
+        ], [
+                struct tm tm;
+                tm.tm_zone = 1;
+        ], ac_cv_struct_tm_zone=yes, ac_cv_struct_tm_zone=no))
+
+if (test "$ac_cv_struct_tm_zone" = "yes"); then
+        AC_DEFINE(HAVE_TM_TM_ZONE, 1, [Define if struct tm has a tm_zone member])
+fi
+
 # Cython Python Bindings
 AC_ARG_WITH([cython],
             [AS_HELP_STRING([--without-cython],