Re: parallel autotest [2/3]: Implement 'testsuite --jobs'.

[Ralf Wildenhues]

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<http://thread.gmane.org/gmane.comp.sysutils.autoconf.patches/5563/focus=5565>

* Ralf Wildenhues wrote on Mon, May 26, 2008 at 07:50:50AM CEST:
> There may be systems that support mknod but not mkfifo.  Not sure
> whether it's useful to support them.

>       Implement parallel Autotest test execution: testsuite --jobs.
>       * lib/autotest/general.m4 (AT_JOB_FIFO_FD): New macro.
>       (AT_INIT): <at_jobs>: New variable.
>       Accept -j, -jN, --jobs[=N], document them in --help output.
>       Implement parallel driver loop using a FIFO, enabled with --jobs
>       and if mkfifo works; otherwise, fall back to sequential loop.
>       (AT_SETUP): Store, do not output summary progress line if
>       parallel.
>       * tests/autotest.at (parallel test execution, parallel truth)
>       (parallel fallacy, parallel skip): New tests.
>       * doc/autoconf.texi (testsuite Invocation): Document -j, --jobs,
>       the mkfifo requirement, and that --errexit may cause concurrent
>       jobs to finish.
>       * NEWS: Update.