http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54419
--- Comment #29 from Marc Glisse <glisse at gcc dot gnu.org> 2012-09-04
18:24:05 UTC ---
(In reply to comment #26)
> The Apple clang 4.0 compiler defaults to its integrated
> assembler
> such that the simple test case...
>
>
> int
> main ()
> {
> asm("rdrand %eax");
> return 0;
> }
>
> is compiled without errors into the assembly....
[...]
> This leaves config.log with ac_cv_x86_rdrand=yes which fails later in the
> bootstrap when the newly built FSF gcc compiler is used and the legacy system
> assembler is used.
Er, why should this test ever be run with the system compiler? libstdc++ should
only ever be built by a newly built g++.
