Boris Gjenero schrieb:
Hello,
By default GNU make runs one job at a time. This fails to take
advantage of multiple cores and/or multiple CPUs on the system that's
doing the building. With the -j option one can specify how many jobs
to run at a time. I have a 4-core Intel Q6600 CPU, and -j 4 cuts the
build time in half, from about 10 minutes to about 5 minutes. Rockbox
seems to build correctly; what I got with -j 4 is identical to what I
get without the -j option. The only disadvantage is that output
messages from different jobs can be intermingled.
Here is some info on this GNU make option:
http://www.gnu.org/software/automake/manual/make/Parallel.html
For now I've still been avoiding this option because when working on
other patches or bugs I do not want to have potential problems from
the build process. Is it okay to use the option?
Regards,
Boris
Totally fine. You might also try -j5 or just -j.
That works just fine.
The other question, I think 5 minutes is still a lot. Do you have ccache
installed?
Best regards.
