Bug#209008: parallel building: DEB_BUILD_OPTIONS or DEB_BUILD_OPTIONS_PARALLEL

[Goswin von Brederlow <brederlo@informatik.uni-tuebingen.de>]

Peter Samuelson <peter@p12n.org> writes:

> [Lucas Nussbaum]
>> - the number of parallel jobs should be specified by the developer
>>   building the package. There's no way to automatically guess the
>>   value in a sensible way, since it doesn't depend only on the number
>>   of CPUs but also on the amount of RAM available.
>
> Right.

Which also means the value should differ between package. So one can't
just put one value into the .${SHELL}rc but it needs to be somewhat
specific to the package.

My suggestion therefore remains to query a script about the
parallelism to use given a few hints (language used, rough memory
estimate, ...).

The source would pass the hints to the script, the developer building
the package sets some boundaries in /etc/<script>rc and/or
~/.<script>rc and the script just returns the parallelism to use.

MfG
        Goswin