[PATCH intel-gpu-tools 1/6] Debugger: convert existing makefiles to Automake.

[Colin Walters]

On Fri, 2012-01-06 at 10:52 -0500, Gaetan Nadon wrote:

> +sr.cpp : sr.g4a
> +	$(srcdir)/pre_cpp.py $(srcdir)/sr.g4a > $@

I recommend writing custom build commands to be atomic.  Which means:

$(srcdir)/pre_cpp.py $(srcdir)/sr.g4a > $@.tmp && mv $@.tmp $@

This way if the developer uses Control-C to send SIGINT to the process
group which kills the command in the middle of a write (or the command
crashes), you don't spend any time debugging the later program which is
consuming a half-written input file.  In some cases this can cause very
subtle corruption or errors.