libio in gcc in CVS is not compatible with glibc 2.2

[H . J . Lu]

The return type of _IO_seekoff in glibc 2.2 is changed from _IO_pos_t
to _IO_off_t. However, libio in gcc still uses _IO_pos_t.  As the
result, "make check" in gcc configured with libstdc++ will fail
in libio/dbz since _G_fpos_t != _G_off_t in glibc 2.2.


H.J.