Re: Inline assembler fallback for _FPU_SETCW() missing in MINGW libraries (issue 577450043 by address@hidden)

[Masamichi Hosoda]

>> $ ~gub/gub/target/linux-x86/root/usr/cross/bin/i686-linux-g++ -c -msse2 
>> -mfpmath=sse -I include -I .. rational.cc
>> $ ~gub/gub/target/freebsd-x86/root/usr/cross/bin/i686-freebsd6-g++ -c -msse2 
>> -mfpmath=sse -I include -I .. rational.cc
> 
> So this only affects darwin-x86 which confirms my observation that
> linux-x86 still works. AFAICS darwin-x86 never had a fpu_control.h, so
> I'd propose to drop -msse2 -mfpmath=sse for i686-apple-darwin8.
> This unblocks the release and the situation on darwin-x86 remains the
> same as before, but we have the fix for linux-x86 and mingw.
> 
> My fear is that not only rational.cc is affected, but also many other
> files. Did you test if a full compile works? If no, I'm against adding
> workarounds for all files that suffer from the compiler error.

I didn't test full compiler works.
However, If I understand correctly,
it seems that static cast from `unsigned long long` to `double`
is only in rational.cc.