diff --git a/libc/bionic/time64_config.h b/libc/bionic/time64_config.h
new file mode 100644
index 0000000..53bcecf
--- /dev/null
+++ b/libc/bionic/time64_config.h
@@ -0,0 +1,75 @@
+/* Debugging
+   TIME_64_DEBUG
+   Define if you want debugging messages
+*/
+/* #define TIME_64_DEBUG */
+
+
+/* INT_64_T
+   A 64 bit integer type to use to store time and others.
+   Must be defined.
+*/
+#define INT_64_T                long long
+
+
+/* USE_TM64
+   Should we use a 64 bit safe replacement for tm?  This will
+   let you go past year 2 billion but the struct will be incompatible
+   with tm.  Conversion functions will be provided.
+*/
+/* #define USE_TM64 */
+
+
+/* Availability of system functions.
+
+   HAS_GMTIME_R
+   Define if your system has gmtime_r()
+
+   HAS_LOCALTIME_R
+   Define if your system has localtime_r()
+
+   HAS_TIMEGM
+   Define if your system has timegm(), a GNU extension.
+*/
+#define HAS_GMTIME_R
+#define HAS_LOCALTIME_R
+/*#define HAS_TIMEGM */
+
+
+/* Details of non-standard tm struct elements.
+
+   HAS_TM_TM_GMTOFF
+   True if your tm struct has a "tm_gmtoff" element.
+   A BSD extension.
+
+   HAS_TM_TM_ZONE
+   True if your tm struct has a "tm_zone" element.
+   A BSD extension.
+*/
+#define HAS_TM_TM_GMTOFF
+#define HAS_TM_TM_ZONE
+
+
+/* USE_SYSTEM_LOCALTIME
+   USE_SYSTEM_GMTIME
+   Should we use the system functions if the time is inside their range?
+   Your system localtime() is probably more accurate, but our gmtime() is
+   fast and safe.
+*/
+#define USE_SYSTEM_LOCALTIME
+/* #define USE_SYSTEM_GMTIME */
+
+
+/* SYSTEM_LOCALTIME_MAX
+   SYSTEM_LOCALTIME_MIN
+   SYSTEM_GMTIME_MAX
+   SYSTEM_GMTIME_MIN
+   Maximum and minimum values your system's gmtime() and localtime()
+   can handle.  We will use your system functions if the time falls
+   inside these ranges.
+*/
+#define SYSTEM_LOCALTIME_MAX     2147483647
+#define SYSTEM_LOCALTIME_MIN    -2147483647
+#define SYSTEM_GMTIME_MAX        2147483647
+#define SYSTEM_GMTIME_MIN       -2147483647
+