hi, ALT_PARALLEL_COMPILE_JOBS is currently only honoured by the corba and the jdk subprojects while the hotspot subproject uses HOTSPOT_BUILD_JOBS as indicator to do a parallel build.
Unfortunately, neither ALT_PARALLEL_COMPILE_JOBS nor HOTSPOT_BUILD_JOBS is handed over from the top-level makefile to the hotspot makefile. This can be however fixed easily by adding the following lines to make/hotspot-rules.gmk, just before the hotspot-build target: ifneq ($(PARALLEL_COMPILE_JOBS), 1) HOTSPOT_BUILD_ARGUMENTS += HOTSPOT_BUILD_JOBS=$(PARALLEL_COMPILE_JOBS) endif After this change, setting ALT_PARALLEL_COMPILE_JOBS on the make command line of the top-level makefile, will be enough to trigger a parallel hotspot build. Regards, Volker
