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.

 See http://gcc.gnu.org/PR13250

 Fixes bad code generated when compiling SHA256 for SH processor

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

 RCS file: /cvs/gcc/gcc/gcc/config/sh/sh.md,v

 retrieving revision 1.171

 retrieving revision 1.172

 diff -u -r1.171 -r1.172

 --- gcc/gcc/config/sh/sh.md	2004/05/10 23:25:13	1.171

 +++ gcc/gcc/config/sh/sh.md	2004/05/28 05:47:36	1.172

 @@ -2194,7 +2194,7 @@

  	parts[0] = gen_reg_rtx (SImode);

  	parts[1] = gen_reg_rtx (SImode);

  	emit_insn (gen_rotlsi3_16 (parts[2-choice], operands[1]));

 -	parts[choice-1] = operands[1];

 +	emit_move_insn (parts[choice-1], operands[1]);

  	emit_insn (gen_ashlsi3 (parts[0], parts[0], GEN_INT (8)));

  	emit_insn (gen_lshrsi3 (parts[1], parts[1], GEN_INT (8)));

  	emit_insn (gen_iorsi3 (operands[0], parts[0], parts[1]));