use compiled binary for gem_prelude.rb.

`gem_prelude.rb` is not compiled yet. This patch compile it to
compiled binary.

builtin.c

@@ -39,5 +39,11 @@ rb_load_with_builtin_functions(const char *feature_name, const struct rb_builtin
 void
 Init_builtin(void)
 {
-    //
+    // nothing
+}
+
+void
+Init_builtin_features(void)
+{
+    rb_load_with_builtin_functions("gem_prelude", NULL);
 }

common.mk

@@ -164,7 +164,7 @@ GOLFOBJS      = goruby.$(OBJEXT) golf_prelude.$(OBJEXT)
 
 DEFAULT_PRELUDES = $(GEM_PRELUDE)
 PRELUDE_SCRIPTS = $(DEFAULT_PRELUDES)
-GEM_PRELUDE   = $(srcdir)/gem_prelude.rb
+GEM_PRELUDE   = 
 PRELUDES      = {$(srcdir)}prelude.c {$(srcdir)}miniprelude.c
 GOLFPRELUDES  = {$(srcdir)}golf_prelude.c
 
@@ -1003,6 +1003,7 @@ BUILTIN_RB_SRCS = \
 		$(srcdir)/pack.rb \
 		$(srcdir)/trace_point.rb \
 		$(srcdir)/prelude.rb \
+		$(srcdir)/gem_prelude.rb \
 		$(empty)
 BUILTIN_RB_INCS = $(BUILTIN_RB_SRCS:.rb=.rbinc)
 

internal.h

@@ -2395,9 +2395,6 @@ RUBY_FUNC_NONNULL(1, bool rb_method_basic_definition_p_with_cc(struct rb_call_da
     })
 #endif
 
-/* miniprelude.c, prelude.c */
-void Init_prelude(void);
-
 /* vm_backtrace.c */
 void Init_vm_backtrace(void);
 VALUE rb_vm_thread_backtrace(int argc, const VALUE *argv, VALUE thval);

mini_builtin.c

@@ -6,11 +6,10 @@
 // included from miniinit.c
 
 static struct st_table *loaded_builtin_table;
-
 rb_ast_t *rb_builtin_ast(const char *feature_name, VALUE *name_str);
 
-void
-rb_load_with_builtin_functions(const char *feature_name, const struct rb_builtin_function *table)
+static const rb_iseq_t *
+builtin_iseq_load(const char *feature_name, const struct rb_builtin_function *table)
 {
     VALUE name_str = 0;
     rb_ast_t *ast = rb_builtin_ast(feature_name, &name_str);
@@ -26,11 +25,16 @@ rb_load_with_builtin_functions(const char *feature_name, const struct rb_builtin
         rb_io_write(rb_stdout, rb_iseq_disasm((const rb_iseq_t *)iseq));
     }
 
-    // register (loaded iseq will not be freed)
     st_insert(loaded_builtin_table, (st_data_t)feature_name, (st_data_t)iseq);
     rb_gc_register_mark_object((VALUE)iseq);
 
-    // eval
+    return iseq;
+}
+
+void
+rb_load_with_builtin_functions(const char *feature_name, const struct rb_builtin_function *table)
+{
+    const rb_iseq_t *iseq = builtin_iseq_load(feature_name, table);
     rb_iseq_eval(iseq);
 }
 
@@ -58,3 +62,10 @@ Init_builtin(void)
     rb_define_singleton_method(rb_cRubyVM, "each_builtin", each_builtin, 0);
     loaded_builtin_table = st_init_strtable();
 }
+
+void
+Init_builtin_features(void)
+{
+    // register for ruby
+    builtin_iseq_load("gem_prelude", NULL);
+}

ruby.c

@@ -1408,10 +1408,12 @@ proc_options(long argc, char **argv, ruby_cmdline_options_t *opt, int envopt)
     return argc0 - argc;
 }
 
+void Init_builtin_features(void);
+
 static void
 ruby_init_prelude(void)
 {
-    Init_prelude();
+    Init_builtin_features();
     rb_const_remove(rb_cObject, rb_intern_const("TMP_RUBY_PREFIX"));
 }
 

template/prelude.c.tmpl

@@ -38,7 +38,7 @@ class Prelude
     @builtin_count = 0
     @preludes = {}
     @mains = preludes.map do |filename|
-      if prelude = filename.end_with?("_prelude.rb")
+      if prelude = filename.end_with?("golf_prelude.rb")
         @prelude_count += 1
       else
         @builtin_count += 1