3 files changed, 22 insertions, 7 deletions
diff --git a/mrbgems/mruby-bin-mrbc/tools/mrbc/mrbc.c b/mrbgems/mruby-bin-mrbc/tools/mrbc/mrbc.c
index 8b0b6dc57..c3e37e0a6 100644
--- a/mrbgems/mruby-bin-mrbc/tools/mrbc/mrbc.c
+++ b/mrbgems/mruby-bin-mrbc/tools/mrbc/mrbc.c
@@ -366,3 +366,18 @@ mrb_final_mrbgems(mrb_state *mrb)
 {
 }
 #endif
+
+#ifdef MRB_USE_COMPLEX
+mrb_value mrb_complex_to_f(mrb_state *mrb, mrb_value comp)
+{
+  mrb_raise(mrb, E_NOTIMP_ERROR, "unavailable for core only");
+}
+#endif
+
+#ifdef MRB_USE_RATIONAL
+mrb_value
+mrb_rational_to_f(mrb_state *mrb, mrb_value rat)
+{
+  mrb_raise(mrb, E_NOTIMP_ERROR, "unavailable for core only");
+}
+#endif
diff --git a/mrbgems/mruby-complex/src/complex.c b/mrbgems/mruby-complex/src/complex.c
index 66176c3c1..6a2f5248e 100644
--- a/mrbgems/mruby-complex/src/complex.c
+++ b/mrbgems/mruby-complex/src/complex.c
@@ -105,8 +105,8 @@ complex_s_rect(mrb_state *mrb, mrb_value self)
   return complex_new(mrb, real, imaginary);
 }
 
-static mrb_value
-complex_to_f(mrb_state *mrb, mrb_value self)
+mrb_value
+mrb_complex_to_f(mrb_state *mrb, mrb_value self)
 {
   struct mrb_complex *p = complex_ptr(mrb, self);
 
@@ -415,7 +415,7 @@ void mrb_mruby_complex_gem_init(mrb_state *mrb)
   mrb_define_method(mrb, mrb->kernel_module, "Complex", complex_s_rect, MRB_ARGS_REQ(1)|MRB_ARGS_OPT(1));
   mrb_define_method(mrb, comp, "real", complex_real, MRB_ARGS_NONE());
   mrb_define_method(mrb, comp, "imaginary", complex_imaginary, MRB_ARGS_NONE());
-  mrb_define_method(mrb, comp, "to_f", complex_to_f, MRB_ARGS_NONE());
+  mrb_define_method(mrb, comp, "to_f", mrb_complex_to_f, MRB_ARGS_NONE());
   mrb_define_method(mrb, comp, "to_i", complex_to_i, MRB_ARGS_NONE());
   mrb_define_method(mrb, comp, "to_c", complex_to_c, MRB_ARGS_NONE());
   mrb_define_method(mrb, comp, "+", complex_add, MRB_ARGS_REQ(1));
diff --git a/mrbgems/mruby-rational/src/rational.c b/mrbgems/mruby-rational/src/rational.c
index de413ba79..b12f45bde 100644
--- a/mrbgems/mruby-rational/src/rational.c
+++ b/mrbgems/mruby-rational/src/rational.c
@@ -291,8 +291,8 @@ rat_float(struct mrb_rational *p)
   return f;
 }
 
-static mrb_value
-rational_to_f(mrb_state *mrb, mrb_value self)
+mrb_value
+mrb_rational_to_f(mrb_state *mrb, mrb_value self)
 {
   struct mrb_rational *p = rational_ptr(mrb, self);
   return mrb_float_value(mrb, rat_float(p));
@@ -394,7 +394,7 @@ rational_eq(mrb_state *mrb, mrb_value x)
   case MRB_TT_COMPLEX:
    {
       mrb_bool mrb_complex_eq(mrb_state *mrb, mrb_value, mrb_value);
-      result = mrb_complex_eq(mrb, y, rational_to_f(mrb, x));
+      result = mrb_complex_eq(mrb, y, mrb_rational_to_f(mrb, x));
       break;
     }
 #endif
@@ -712,7 +712,7 @@ void mrb_mruby_rational_gem_init(mrb_state *mrb)
   mrb_define_method(mrb, rat, "numerator", rational_numerator, MRB_ARGS_NONE());
   mrb_define_method(mrb, rat, "denominator", rational_denominator, MRB_ARGS_NONE());
 #ifndef MRB_NO_FLOAT
-  mrb_define_method(mrb, rat, "to_f", rational_to_f, MRB_ARGS_NONE());
+  mrb_define_method(mrb, rat, "to_f", mrb_rational_to_f, MRB_ARGS_NONE());
 #endif
   mrb_define_method(mrb, rat, "to_i", rational_to_i, MRB_ARGS_NONE());
   mrb_define_method(mrb, rat, "to_r", rational_to_r, MRB_ARGS_NONE());