* configure.in (target frags): Add powerpc*-linux-gnulibc1.
        (stdio-lock): Similarly.

        * configure.in (target frags): Add alpha*-linux-gnulibc1.
        (pic frags): Its alpha*- not alpha-.
        (stdio-lock): Kill everything.  Add alpha*-linux-gnulibc1.
        * libio.h: Check __GLIBC_MINOR__ to find stdio-lock.h.  If not
        _IO_MTSAFE_IO & GLIBC, make sure the lock pointer is still there.
        * libioP.h: Check __GLIBC_MINOR__ to find libc-lock.h.

        * config/linuxaxp1-libc-lock.h: New file.
        * config/linuxaxp1-stdio-lock.h: New file.
        * config/linuxaxp1.mt: New file.

        * gen-params (va_list): Check for and use __gnuc_va_list.
        (NULL): Work around some linux kernel headers and redefine NULL.

From-SVN: r16769