configure: Enable 64-bit time_t on Linux.

configure

@@ -10579,6 +10579,9 @@ fi
 
 printf "%s\n" "#define _GNU_SOURCE 1" >>confdefs.h
 
+
+printf "%s\n" "#define _TIME_BITS 64" >>confdefs.h
+
     case $host_cpu in
       *i[3456789]86*)
         DLLFLAGS="$DLLFLAGS -fno-PIC"

configure.ac

@@ -812,6 +812,7 @@ case $host_os in
 
   *)
     AC_DEFINE(_GNU_SOURCE,1,[Define to 1 to enable GNU extensions on Linux])
+    AC_DEFINE(_TIME_BITS,64,[Define to 64 to enable 64-bit time_t on Linux])
     case $host_cpu in
       *i[[3456789]]86*)
         DLLFLAGS="$DLLFLAGS -fno-PIC"

include/config.h.in

@@ -903,6 +903,9 @@
 /* Define for large files, on AIX-style hosts. */
 #undef _LARGE_FILES
 
+/* Define to 64 to enable 64-bit time_t on Linux */
+#undef _TIME_BITS
+
 /* Define to `__inline__' or `__inline' if that's what the C compiler
    calls it, or to nothing if 'inline' is not supported under any name.  */
 #ifndef __cplusplus