On Sat, 25 Apr 2009, Denis Onischenko wrote:
> Thanks for the patch.
>
> There are another error while building linux kernel with GCC 4.5.0
> revision 146771.
>
> The minimal code for reproducing the error looks like:
>
> extern unsigned int __invalid_size_argument;
> #define TYPECHECK(t) ( sizeof(t) == sizeof(t[1]) ? sizeof(t) :
> __invalid_size_argument )
>
> enum {
> ENUM_VALUE_NAME = TYPECHECK(int),
Is the kernel using this sort of non-integer-constant-expression in
bit-field widths as well? Sizes of file-scope arrays (OK, a special case
for that was added for WINE)? Null pointer constants (that's much more
problematic to add special cases for)? __builtin_choose_expr conditions?
It seems to be making rather a lot of use of an old obscure undocumented
extension.
--
Joseph S. Myers
jos...@codesourcery.com
