[GCC-XML] internal error with 0.9.0

[Steve Vinoski]

Great, thanks. The code causing the internal error actually comes from
the Boost library, file boost/pending/integer_log2.hpp from Boost
1.34, and specifically this construct:

template <int p, int n>
struct max_pow2_less {
      enum { c = 2*n < p };
      static const int value = c ? (max_pow2_less< c*p, 2*c*n>::value) : n;
};

It's specifically the definition of the "value" static const int
variable that causes the problem. Here's one possible workaround:

enum { c = 2*n < p, next_p = c*p, next_n = 2*c*n };
static const int value = c ? (max_pow2_less< next_p, next_n>::value) : n;

I tried to put a breakpoint at tree.c:4582, indicated in the internal
compiler error message, but it never hit it.

Any further suggestions for how to proceed with tracking this down and
fixing it?

thanks,
--steve

On 2/9/08, David Cole <david.cole at kitware.com> wrote:
> When configuring with CMake, set CMAKE_BUILD_TYPE to Debug for a makefile
> based build. (Or if building with Visual Studio or Xcode, just build the
> Debug configuration...)
>
>  HTH,
> Dave
>
>
>
> On 2/9/08, Steve Vinoski <vinoski at ieee.org> wrote:
> >
> > Apologies if this has already been covered; I just joined the list and
> > searched for this issue but didn't find anything.
> >
> > With gccxml 0.9.0 built against sources fresh out of cvs and running
> > against a gcc 4.2.2 compiler installation, I see this error with a
> > number of files that compile fine with straight g++ 4.2.2:
> >
> > internal compiler error: tree check: expected integer_cst, have
> > lt_expr in tree_int_cst_sgn, at tree.c:4582
> >
> > Has anyone else seen this? If not, any recommendations for debugging
> > it? Sending preprocessed output isn't possible. Are there instructions
> > available anywhere for building a debuggable gccxml?
> >
> > thanks,
> > --steve
> > _______________________________________________
> > gccxml mailing list
> > gccxml at gccxml.org
> > http://www.gccxml.org/mailman/listinfo/gccxml
> >
>
>