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Re: crosstool-0.42 released: adds gcc-4.1.0 final, improve mac doc


On Fri, Mar 03, 2006 at 11:18:20AM -0800, Dan Kegel wrote:

> > FYI, gcc-4.1.0-glibc-2.3.6 (not included in the arm.dat file) fails
> > on ARM with:
> >
> >         ../sysdeps/generic/s_fmax.c: In function `__fmax':
> >         ../sysdeps/generic/s_fmax.c:28: internal compiler error: in elim_reg_cond, at flow.c:3328
> 
> Right, that's because we build glibc-2.3.6 with gcc-3.3.6:
> $ more gcc-4.1.0-20060223-glibc-2.3.6.dat
> ...
> GCC_CORE_DIR=gcc-3.3.6
> ...
> 
> > This is a known gcc 3.3.x problem, IIRC.  I remember there was some
> > workaround but I forgot which.
> 
> It'd be nice to have.  Anyone remember?

Ah, right, now I remember having to work around this for my Fedora
Core 2 ARM port.  This is the (ugly hackish) workaround.  Not sure if
we want to include this in crosstool.
	http://skrybele.wantstofly.org/fc2/SRPMS.patches/glibc-2.3.3-27/glibc-dontuse_builtin_float_functions.patch 

There's a debian bug report for this which never really got fixed:
	http://bugs.debian.org/298508

This seems to be the gcc bug report:
	http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15068
(But strangely enough, the code that fixed by the included patch
wasn't present in gcc 3.3.x at all, so maybe it's just a different
bug than the one that #15068 talks about but in the same function?)

crosstool 0.38 gcc-3.3.6-glibc-2.3.5 also had this issue:
	http://kegel.com/crosstool/crosstool-0.38/buildlogs/arm-softfloat-gcc-3.3.6-glibc-2.3.5.log.txt


cheers,
Lennert

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