* 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
