## This is a simple wrapper Makefile that calls the main Makefile.perf# with a -j option to do parallel builds## If you want to invoke the perf build in some non-standard way then# you can use the 'make -f Makefile.perf' method to invoke it.# ## Clear out the built-in rules GNU make defines by default (such as .o targets),# so that we pass through all targets to Makefile.perf:#.SUFFIXES: ## We don't want to pass along options like -j:#unexport MAKEFLAGS ## Do a parallel build with multiple jobs, based on the number of CPUs online# in this system: 'make -j8' on a 8-CPU system, etc.## (To override it, run 'make JOBS=1' and similar.)#ifeq ($(JOBS),)  JOBS := $(shell grep -c ^processor /proc/cpuinfo 2>/dev/null)  ifeq ($(JOBS),)    JOBS := 1  endifendif ## Only pass canonical directory names as the output directory:#ifneq ($(O),)  FULL_O := $(shell readlink -f $(O) || echo $(O))endif ## Only accept the 'DEBUG' variable from the command line:#ifeq ("$(origin DEBUG)", "command line")  ifeq ($(DEBUG),)    override DEBUG = 0  else    SET_DEBUG = "DEBUG=$(DEBUG)"  endifelse  override DEBUG = 0endif define print_msg  @printf '  BUILD:   Doing '\''make \033[33m-j'$(JOBS)'\033[m'\'' parallel build\n'endef define make  @$(MAKE) -f Makefile.perf --no-print-directory -j$(JOBS) O=$(FULL_O) $(SET_DEBUG) $@endef ## Needed if no target specified:#all:	$(print_msg)	$(make) ## The clean target is not really parallel, don't print the jobs info:#clean:	$(make) ## All other targets get passed through:#%:	$(print_msg)	$(make)