add optional wren features

CMakeLists.txt

@@ -29,9 +29,8 @@ set(SOURCES
   wren/src/wren_utils.c
   wren/src/wren_value.c
   wren/src/wren_vm.c
-
-  #wren/src/wren_opt_meta.c
-  #wren/src/wren_opt_random.c
+  wren/src/wren_opt_meta.c
+  wren/src/wren_opt_random.c
 )
 # shared assets
 set(ASSETS

wren/src/wren_common.h

@@ -48,11 +48,11 @@
 // these or not. By default, they are all available. To disable one, set the
 // corresponding `WREN_OPT_<name>` define to `0`.
 #ifndef WREN_OPT_META
-  #define WREN_OPT_META 0
+  #define WREN_OPT_META 1
 #endif
 
 #ifndef WREN_OPT_RANDOM
-  #define WREN_OPT_RANDOM 0
+  #define WREN_OPT_RANDOM 1
 #endif
 
 // These flags are useful for debugging and hacking on Wren itself. They are not

wren/src/wren_opt_random.c

@@ -3,7 +3,7 @@
 #if WREN_OPT_RANDOM
 
 #include <string.h>
-#include <time.h>
+#include <gint/rtc.h>
 
 #include "wren.h"
 #include "wren_vm.h"
@@ -47,7 +47,7 @@ static void randomSeed0(WrenVM* vm)
 {
   Well512* well = (Well512*)wrenGetSlotForeign(vm, 0);
 
-  srand((uint32_t)time(NULL));
+  srand(rtc_ticks());
   for (int i = 0; i < 16; i++)
   {
     well->state[i] = rand();