##
##
-## Detect host OS
+## Detect number of processors
##
+NPROCS := $(shell grep -c ^processor /proc/cpuinfo)
OS := $(shell uname)
##
## Makefile flags
##
-MAKEFLAGS += -l -j -rR --no-print-directory
+MAKEFLAGS += -l -j $(NPROCS) -rR --no-print-directory
ifneq ($(findstring clean,$(MAKECMDGOALS)),)
MAKEFLAGS += -j 1