From: KOSAKI Motohiro <kosaki.motohiro@...>
Date: 2011-11-28T23:56:49+09:00
Subject: [ruby-core:41368] Re: [ruby-trunk - Bug #5679][Open] Too many arguments for format warnings on mingw32 build

> I can see the following warnings during mingw32 build.
>
> gc.c: In function 'gc_profile_result':
> gc.c:3581:4: warning: unknown conversion type character 'z' in format
> gc.c:3581:4: warning: unknown conversion type character 'z' in format
> gc.c:3581:4: warning: unknown conversion type character 'z' in format
> gc.c:3581:4: warning: format '%30.20f' expects type 'double', but argument 5 has type 'unsigned int'
> gc.c:3581:4: warning: too many arguments for format

Where does 'z' come from?


> And I know these warnings are completely meaningless because Ruby uses it's own BSD_vfprintf implementaion.
>
> Here is a patch of include/ruby/ruby.h for suppressing format warnings on mingw32

Your analysis doesn't have why mingw makes such annoying warnings.
And, in fact, 99% printf don't make such annoying warnings. So, it's
no good idea blindly suppressing.