Huge fixes to glibc build, so that we can build at least (and at last):
- use ports addon even when installing headers,
- use optimisation (-O) when installing headers, to avoid unnecessary warnings (thanks Robert P. J. DAY for pointing this out!),
- lowest kernel version to use is only X.Y.Z, not X.Y.Z.T,
- a bit of preparations for NPTL (RSN I hope),
- fix fixing the linker scripts (changing the backup file is kind of useless and stupid);

Shut uClibc finish step: there really is nothing to do;

Add a patch for glibc-2.3.6 weak aliases handling on some archs (ARM and ALPHA at least);

Did not catch the make errors: fixed the pattern matching in scripts/functions;

Introduce a new log level, ALL:
- send components' build messages there,
- DEBUG log level is destined only for crosstool-NG debug messages,
- migrate sub-actions to use appropriate log levels;

Update the armeb-unknown-linux-gnu sample:
- it builds!
- uses gcc-4.0.4 and glibc-2.3.6,
- updated to latest config options set.

 http://sources.redhat.com/cgi-bin/cvsweb.cgi/libc/sysdeps/unix/sysv/linux/sys/epoll.h.diff?r1=1.1&r2=1.2&cvsroot=glibc

 Needed for modern sys_epoll.

 ===================================================================

 RCS file: /cvs/glibc/libc/sysdeps/unix/sysv/linux/sys/epoll.h,v

 retrieving revision 1.1

 retrieving revision 1.2

 diff -u -r1.1 -r1.2

 --- libc/sysdeps/unix/sysv/linux/sys/epoll.h	2002/12/16 23:35:27	1.1

 +++ libc/sysdeps/unix/sysv/linux/sys/epoll.h	2003/03/24 23:50:25	1.2

 @@ -1,4 +1,4 @@

 -/* Copyright (C) 2002 Free Software Foundation, Inc.

 +/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.

     This file is part of the GNU C Library.

     The GNU C Library is free software; you can redistribute it and/or

 @@ -42,8 +42,10 @@

  #define EPOLLMSG EPOLLMSG

      EPOLLERR = 0x008,

  #define EPOLLERR EPOLLERR

 -    EPOLLHUP = 0x010

 +    EPOLLHUP = 0x010,

  #define EPOLLHUP EPOLLHUP

 +    EPOLLET = (1 << 31)

 +#define EPOLLET EPOLLET

    };