Time class made optinal

include/mrbconf.h

@@ -39,6 +39,9 @@ typedef intptr_t mrb_sym;
 #define INCLUDE_MATH	/* use (non ISO) Math module */
 //#undef INCLUDE_MATH     /* not use (non ISO) Math module */
 
+#define INCLUDE_TIME	/* use Time module */
+//#undef INCLUDE_TIME     /* not use Time module */
+
 #ifdef  MRUBY_DEBUG_BUILD
 # define PARSER_DUMP
 #endif

src/init.c

@@ -56,7 +56,9 @@ mrb_init_core(mrb_state *mrb)
 #endif
   mrb_init_exception(mrb);
   mrb_init_print(mrb);
+#ifdef INCLUDE_TIME
   mrb_init_time(mrb);
+#endif
 #ifdef INCLUDE_MATH
   mrb_init_math(mrb);
 #endif

src/time.c

@@ -6,6 +6,7 @@
 
 
 #include "mruby.h"
+#ifdef INCLUDE_TIME
 #include <string.h>
 #include <stdio.h>
 #include <time.h>
@@ -742,3 +743,5 @@ mrb_init_time(mrb_state *mrb)
       utc_offset(15.2.19.7.29)
   */
 }
+#endif
+