# # 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 endif endif # # 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)" endif else override DEBUG = 0 endif 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: # (Except for tags and TAGS targets. The reason is that the # Makefile does not treat tags/TAGS as targets but as files # and thus won't rebuilt them once they are in place.) # all tags TAGS: $(print_msg) $(make) # # The clean target is not really parallel, don't print the jobs info: # clean: $(make) # # The build-test target is not really parallel, don't print the jobs info: # build-test: @$(MAKE) -f tests/make --no-print-directory # # All other targets get passed through: # %: $(print_msg) $(make) .PHONY: tags TAGS