Debug facilities:
- add a framework to easily add new ones
- add gdb as a first debug facility
- add patches for gdb
After the kernel checked its installed headers, clean up the mess of .checked.* files.
Reorder scripts/crosstool.sh:
- dump the configuration early
- renice early
- get info about build system early, when setting up the environment
- when in cross or native, the host tools are those of the build system, and only in this case
- elapsed time calculations moved to scripts/functions
Remove handling of the color: it's gone once and for all.
Update tools/addToolVersion.sh:
- handle debug facilities
- commonalise some code
- remove dead tools (cygwin, tcc)
Point to my address for bug reports.

Sometime around 2.4.22-23, the mips pt_regs.h fields were reordered, breaking

coredump handling by gdb for current kernels.  Update the hardcoded constants

to reflect the change.

--- gdb-6.2.1/gdb/mips-linux-tdep.c-orig	2004-10-29 14:23:55.000000000 -0500

+++ gdb-6.2.1/gdb/mips-linux-tdep.c	2004-10-29 14:26:44.000000000 -0500

@@ -53,12 +53,22 @@

 #define EF_REG0			6

 #define EF_REG31		37

+

+#if 0

 #define EF_LO			38

 #define EF_HI			39

 #define EF_CP0_EPC		40

 #define EF_CP0_BADVADDR		41

 #define EF_CP0_STATUS		42

 #define EF_CP0_CAUSE		43

+#else

+#define EF_CP0_STATUS		38

+#define EF_LO			39

+#define EF_HI			40

+#define EF_CP0_BADVADDR		41

+#define EF_CP0_CAUSE		42

+#define EF_CP0_EPC		43

+#endif

 #define EF_SIZE			180