mkdir -p $(PACKAGE_INSTALL_DIR) ; \
conf="$(TIMESTAMP_DIR)/$(CONFIGURE_TIMESTAMP)" ; \
dirs="$(call package_mk_fn,$(PACKAGE)) \
+ $(SOURCE_PATH_BUILD_DATA_DIRS)/platforms/$(PLATFORM).mk \
+ $(wildcard $(call find_source_fn,$(PACKAGE_SOURCE))/cmake) \
+ $(shell find $(call find_source_fn,$(PACKAGE_SOURCE)) \
+ -name CMakeLists.txt) \
$(wildcard $(call find_source_fn, \
$(PACKAGE_SOURCE))$(PACKAGE_SUBDIR)/configure) \
$(MU_BUILD_ROOT_DIR)/config.site" ; \
# we assume there's 1 processor; we use 2*ncpu for the -j option.
# NB: GNU Make 4.2 will let us use '$(file </proc/cpuinfo)' to both test
# for file presence and content; for now this will have to do.
-MAKE_PARALLEL_JOBS = -j $(if $(shell [ -f /proc/cpuinfo ] && head /proc/cpuinfo), \
+ifndef MAKE_PARALLEL_JOBS
+MAKE_PARALLEL_JOBS = $(if $(shell [ -f /proc/cpuinfo ] && head /proc/cpuinfo), \
$(shell grep -c ^processor /proc/cpuinfo), 2)
-MAKE_PARALLEL_FLAGS ?= $(if $($(PACKAGE)_make_parallel_fails),,$(MAKE_PARALLEL_JOBS))
+endif
+MAKE_PARALLEL_FLAGS ?= $(if $($(PACKAGE)_make_parallel_fails),,-j $(MAKE_PARALLEL_JOBS))
# Make command shorthand for packages & tools.
PACKAGE_MAKE = \