Avoid using C++ style comments (//).

include/mruby/class.h

@@ -51,7 +51,7 @@ mrb_class(mrb_state *mrb, mrb_value v)
   }
 }
 
-// TODO: figure out where to put user flags
+/* TODO: figure out where to put user flags */
 #define MRB_FLAG_IS_FROZEN (1 << 18)
 #define MRB_FLAG_IS_PREPENDED (1 << 19)
 #define MRB_FLAG_IS_ORIGIN (1 << 20)

include/mruby/numeric.h

@@ -48,9 +48,11 @@ mrb_value mrb_num_div(mrb_state *mrb, mrb_value x, mrb_value y);
 # define MRB_HAVE_TYPE_GENERIC_CHECKED_ARITHMETIC_BUILTINS
 #endif
 
+/*
 // Clang 3.8 and 3.9 have problem compiling mruby in 32-bit mode, when MRB_INT64 is set
 // because of missing __mulodi4 and similar functions in its runtime. We need to use custom
 // implementation for them.
+*/
 #ifdef MRB_HAVE_TYPE_GENERIC_CHECKED_ARITHMETIC_BUILTINS
 #if defined(__clang__) && (__clang_major__ == 3) && (__clang_minor__ >= 8) && \
     defined(MRB_32BIT) && defined(MRB_INT64)

src/class.c

@@ -993,7 +993,7 @@ include_module_at(mrb_state *mrb, struct RClass *c, struct RClass *ins_pos, stru
       if (p->tt == MRB_TT_ICLASS) {
         if (p->mt == m->mt) {
           if (!superclass_seen) {
-            ins_pos = p; // move insert point
+            ins_pos = p; /* move insert point */
           }
           goto skip;
         }
@@ -1160,7 +1160,7 @@ mrb_mod_initialize(mrb_state *mrb, mrb_value mod)
 {
   mrb_value b;
   struct RClass *m = mrb_class_ptr(mod);
-  boot_initmod(mrb, m); // bootstrap a newly initialized module
+  boot_initmod(mrb, m); /* bootstrap a newly initialized module */
   mrb_get_args(mrb, "|&", &b);
   if (!mrb_nil_p(b)) {
     mrb_yield_with_class(mrb, b, 1, &mod, mod, m);