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.

 From:

 	http://sources.redhat.com/ml/libc-alpha/2005-07/msg00051.html

 	http://sources.redhat.com/ml/crossgcc/2005-10/msg00035.html

 Message-ID: <434576E1.6020305@sscd.de>

 Date: Thu, 06 Oct 2005 21:11:29 +0200

 From: Alexander Sieb <sieb at sscd dot de>

 To: crossgcc at sourceware dot org

 Subject: Crosstool sh4-linux-gcc-4.0.2-glibc-2.3.5 patches

 On sh[34]-linux, memset function does not work if 2nd argument is negative

 and 3rd argument is greater than 12.

 for example, memset(ptr, "\xda", 20) sets 0xff instead of 0xda.

 Attached patch fixes this problem.

 	* sysdeps/sh/memset.S (memset): Correct 2nd argument handling.

 --- glibc-2.3.5.old/sysdeps/sh/memset.S	29 Apr 2003 22:47:18 -0000	1.4

 +++ glibc-2.3.5/sysdeps/sh/memset.S	23 Jul 2005 08:37:21 -0000

 @@ -28,6 +28,7 @@ ENTRY(memset)

  	bt.s	L_byte_loop_init

  	mov	r4,r7

 +	extu.b	r5,r5

  	swap.b	r5,r1

  	or	r1,r5

 	swap.w	r5,r1

 Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>