io.c, ruby.c: include internal/variable.h for rb_gvar_readonly_setter
Same as 053f78e13988e9253d1f207bf5e23d9505112b32. emscripten requires a prototype declaration of rb_gvar_readonly_setter if it is refered as a function pointer.
Added by mame (Yusuke Endoh) over 5 years ago
io.c, ruby.c: include internal/variable.h for rb_gvar_readonly_setter
Same as 053f78e13988e9253d1f207bf5e23d9505112b32.
emscripten requires a prototype declaration of rb_gvar_readonly_setter
if it is refered as a function pointer.