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Re: we are starting the wide int merge

On Sat, 17 May 2014, Richard Sandiford wrote:
> To rule out one possibility: which GCC are you using for stage1?

I think that may the smoking gun.  When I use GCC 4.7 to bootstrap,
FreeBSD 8, 9 and 10 all build fine on i386 (= i486) and amd64.

When I use the system compiler, which is GCC 4.2 on FreeBSD 8 and 9
and clang on FreeBSD 10, things fail on FreeBSD 10...

...with a bootstrap comparison failure of stages 2 and 3 on i386:

...and an interesting failure on amd64:

In file included from .././../gcc-4.10-20140518/gcc/xcoffout.c:29:
.././../gcc-4.10-20140518/gcc/tree.h:4576:3: warning: extraneous template 
parameter list in template specialization
  template <>
.././../gcc-4.10-20140518/gcc/ error: invalid use of a 
cast in a inline asm context requiring an l-value: remove the cast or 
build with -fheinous-gnu-extensions
          umul_ppmm (val[1], val[0], op1.ulow (), op2.ulow ());

This means this clang-based system is not able to bootstrap GCC trunk
on amd64.

Perhaps looking into this first may affect the failure on i486?


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