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 3.4 branch.  Fixes test failure

 FAIL: g++.dg/abi/empty6.C  (test for warnings, line 6)

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

 RCS file: /cvs/gcc/gcc/gcc/testsuite/g++.dg/abi/empty6.C,v

 retrieving revision 1.1

 retrieving revision 1.2

 diff -u -r1.1 -r1.2

 --- gcc/gcc/testsuite/g++.dg/abi/empty6.C	2002/09/25 19:07:35	1.1

 +++ gcc/gcc/testsuite/g++.dg/abi/empty6.C	2003/06/03 19:10:09	1.2

 @@ -5,4 +5,9 @@

  struct B {

    A a; // { dg-warning "empty" }

    virtual void f () {}

 -};

 +} __attribute__((aligned(8)));

 +/* The preceding attribute is necessary on targets with

 +   BIGGEST_ALIGNMENT <= 32 to trigger the warning, as otherwise a 32 bit

 +   offset is split into DECL_FIELD_OFFSET 4 and DECL_FIELD_BIT_OFFSET 0,

 +   and then there is no discrepancy between DECL_FIELD_OFFSET and

 +   byte_position to warn about.  */