Hello,
I would like to use all processor cores for a software build.
So I try to reuse a corresponding system setting by a command
like "getconf _NPROCESSORS_ONLN" in recipes for a make file.
A bit of build preparation needs to be performed in a serial
way before I can begin the desired parallel data processing
with starting of some single-threaded programs for
background execution.
Such a system setting can vary during the run time of the
affected computing environment.
So I need to be flexible with the specification of input and
output parameters for these programs. But I see some software
development challenges for this use case.
1. If I would use a specific file name pattern here,
I guess that they will also be needed for the
dependency list of make targets.
How should I create make targets in a consistent way
on demand?
2. The return/exit code needs to recorded in dedicated files
for the background processes so that their results can
be safely checked in recipes later on.
But I need to fiddle with several output files as
a consequence for a specific target.
How should I handle corresponding open issues then?
* "a syntax for multitarget rules"
by Reinier Post
http://lists.gnu.org/archive/html/help-make/2014-11/msg00013.html
* "Rules With Multiple Outputs in GNU Make"
by Eric Melski
http://www.cmcrossroads.com/article/rules-multiple-outputs-gnu-make
I would appreciate your ideas and further advices.
Regards,
Markus
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