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Building

In order to build the image, you need to choose a hardware target. All of the available targets can be printed by issuing make list_targets.

There is a fair amount more information in targets.mk at the top level, however, including human-readable names.

todo: list main targets for NYC Mesh

Parallel Builds

The qmpfw build system accepts the J config to parallelize the build process. If you have 4 cpus, for instance, you might issue something like make T=nsm5 J=4 build to fully use your resources.

This may make it difficult to use your machine for other tasks, however, especially with regard to io. See the next section for some options there.

Relevant docs from qmp are here: http://dev.qmp.cat/projects/qmp/wiki/Qmpfw

Nice Builds

n.b. This is GNU-Linux specific for now. Contributions for other osen most welcome.

To keep your system responsive, at the cost of longer build times, you can use ionice and nice to restrict the build process to idle resources.

The following suggestion is from the openwrt dev site:

ionice -c 3 nice -n19 make .....

In brief:

  • ionice -c 3 gives the process only idle io resources.
  • nice -n19 gives the process the last priority for scheduling.