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[OT] Re: 1.5.18-1: undefined reference to `ffs' in mno-cygwin mode
Dmitry Smirnov wrote:
>> While this isn't a Cygwin issue (you're using '-mno-cygwin'),
> Well, I never installed mingw separately. Is was a part of Cygwin
> installation, so I supposed it has some relation. :-)
Well, we give you a MinGW cross-compiler in the -mno-cygwin mode of gcc ...
but we don't support MinGW programs that you write with it!
> I'll try to ask mingw guys.
They're bound to know better than we do here what's the best way to fix it.
>> This search:
>> http://www.google.com/search?q=ffs+qemu
>> leads to some links that look promising.
>
> First one (http://qemu-forum.ipi.fi/viewtopic.php?f=5&t=4802) is mine.
> No replies yet. Some others were read before these posts. I did not
> find remedy.
>
> Thanks for bultin link, I'll investigate it...
Talk to the MinGW guys, but the answer could be as simple as adding
#if defined (__GNUC__) && !defined (__OPTIMIZE__)
#define ffs(x) __builtin_ffs ((x))
#endif
... to some appropriate header file.
cheers,
DaveK
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