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/bugzilla/show_bug.cgi?id=11096

 and http://gcc.gnu.org/ml/gcc-patches/2003-06/msg00424.html

 --- gcc-3.3/gcc/config/sh/linux.h.old	Wed Jun  4 17:37:40 2003

 +++ gcc-3.3/gcc/config/sh/linux.h	Wed Jun  4 17:38:16 2003

 @@ -53,5 +53,9 @@

     %{static:-static}"

 +/* The GNU C++ standard library requires that these macros be defined.  */

 +#undef CPLUSPLUS_CPP_SPEC

 +#define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"

 +

  #undef LIB_SPEC

  #define LIB_SPEC \

    "%{shared: -lc} \