2009/3/5 Boris Gjenero <[email protected]>: > 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 >
we have had build problems before with dependancies usin it, but hey are always fixed... I would guess all the build servers are using -j
