2010/7/28 Dongsheng Song <[email protected]>:
> Hi Kai,
>
> When we cross build gcc 4.5 for windows, I found we can build windows gcc
> binary one
> week ago, but now the build failed.
>
> After I do a binary search, I found the issue caused by r2945.
>
> r2950 | 2010-07-24 05:50:28 | FAILED
> r2945 | 2010-07-24 02:44:15 | FAILED
> r2944 | 2010-07-24 02:38:30 | SUCCESS
> r2939 | 2010-07-23 17:55:30 | SUCCESS
> r2928 | 2010-07-23 05:21:20 | SUCCESS
> r2924 | 2010-07-22 18:32:25 | SUCCESS
>
> r2945 remove some *IMPORTANT* macros from
> /trunk/mingw-w64-headers/crt/float.h,
> e.g. FLT/DBL/LDBL_MANT_DIG, FLT_EVAL_METHOD, *ALL* decimal macros
> (DEC32/64/128_*, ...)
>
> When I add FLT/DBL/LDBL_MANT_DIG and FLT_EVAL_METHOD back to
> /trunk/mingw-w64-headers/crt/float.h,
> then the gcc cross build success again.
>
> So I recommend you apply the attached patch at least.
>
> btw, I know FLT_EVAL_METHOD added by C99, but libgfortran/m4/nearest.m4 use
> it,
> is it mean we should use ISO C99 compiler to build gcc 4.5 or later, not ISO
> C90 as
> http://gcc.gnu.org/install/prerequisites.html ?
>
> Regards,
> Dongsheng
Hello Dongsheng,
the recent change to float.h was necessary to support the new
include_next patch of 4.6. So how are you exactly installing headers?
As usual you should just see gcc's internal float.h for older gcc's
then 4.6. So I am a bit puzzled. Are you removing gcc's float.h here?
Regards,
Kai
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