auto import from //depot/cupcake/@135843
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
+