Ok,

Attached is an updated script:

> The changes are:
> 
> 
> - restartable
> 
> Instead of starting over from scratch, it tries to continue on from where the last run left off (after being CNTRL-Ced or failing).  To force a complete rebuild of each target, use the option:
> 
> `-f' (force) will force a new run
> 
> 
> - stop on failure
> 
> The script, by default, aborts on the first failed build.  The assumption is that the problem will be fixed and then the script re-started.  This can be overriden with the option:
> 
> `-k' (keep going) will force the script to try and build everything possible (the flag is passed to make as well).
> 
> 
> - parallel

It is possible to specify parallism at two levels.  Firstly the number 
of builds, and secondly the number of jobs MAKE tries to sustain.  Two 
options control this:

`-b MAXBUILDS' The number of builds to run in parallel.
`-j MAXJOBS' The number of jobs, whithin a build, that MAKE should run 
in parallel (using `make -j MAXJOBS').

These options are orthoginal, `-b 3 -j 2' will result in the script 
running up to three simultaneous `make -j 2'.

> - testing
> 
> In addition to checking the configure and build, the script also tries to run the built GDB to the point where it checks that '(gdb) maint print architecture' succeeds.
> 
> (NB: The h8500hms target currently barfs when run, I think I might propose that it be booted out of the build list).
> 
> 
> - selecting targets
> 
> A sub-set of targets can be selected using the option:
> 
> `-e <targexp>' Select a subset of the targets using the (grep) regular expression <targexp>.  Multiple expressions can be specified.

- more verbose output

By default the output from the configure and build is supressed (saved 
to a log file).  This can be disabled with:

-v (verbose) Provide more verbose output (e.g., output the configure, 
build and run results to stdout).

This is very useful from within emacs.  Something like `M-X compile' 
`./gdb_build.sh -v .. /tmp' works.


David, yes, `gdb_build.sh -k -f' should give you back something like the 
old behavior.

Richard, should `-j 2' be the default?  Now that this doesn't lead to 
two parallel configures (which is what I think hammers the poor host).

Andrew