1# 2# This is a simple wrapper Makefile that calls the main Makefile.perf 3# with a -j option to do parallel builds 4# 5# If you want to invoke the perf build in some non-standard way then 6# you can use the 'make -f Makefile.perf' method to invoke it. 7# 8 9# 10# Clear out the built-in rules GNU make defines by default (such as .o targets), 11# so that we pass through all targets to Makefile.perf: 12# 13.SUFFIXES: 14 15# 16# We don't want to pass along options like -j: 17# 18unexport MAKEFLAGS 19 20# 21# Do a parallel build with multiple jobs, based on the number of CPUs online 22# in this system: 'make -j8' on a 8-CPU system, etc. 23# 24# (To override it, run 'make JOBS=1' and similar.) 25# 26ifeq ($(JOBS),) 27 JOBS := $(shell (getconf _NPROCESSORS_ONLN || egrep -c '^processor|^CPU[0-9]' /proc/cpuinfo) 2>/dev/null) 28 ifeq ($(JOBS),0) 29 JOBS := 1 30 endif 31endif 32 33# 34# Only pass canonical directory names as the output directory: 35# 36ifneq ($(O),) 37 FULL_O := $(shell readlink -f $(O) || echo $(O)) 38endif 39 40# 41# Only accept the 'DEBUG' variable from the command line: 42# 43ifeq ("$(origin DEBUG)", "command line") 44 ifeq ($(DEBUG),) 45 override DEBUG = 0 46 else 47 SET_DEBUG = "DEBUG=$(DEBUG)" 48 endif 49else 50 override DEBUG = 0 51endif 52 53define print_msg 54 @printf ' BUILD: Doing '\''make \033[33m-j'$(JOBS)'\033[m'\'' parallel build\n' 55endef 56 57define make 58 @$(MAKE) -f Makefile.perf --no-print-directory -j$(JOBS) O=$(FULL_O) $(SET_DEBUG) $@ 59endef 60 61# 62# Needed if no target specified: 63# (Except for tags and TAGS targets. The reason is that the 64# Makefile does not treat tags/TAGS as targets but as files 65# and thus won't rebuilt them once they are in place.) 66# 67all tags TAGS: 68 $(print_msg) 69 $(make) 70 71# 72# The clean target is not really parallel, don't print the jobs info: 73# 74clean: 75 $(make) 76 77# 78# The build-test target is not really parallel, don't print the jobs info: 79# 80build-test: 81 @$(MAKE) -f tests/make --no-print-directory 82 83# 84# All other targets get passed through: 85# 86%: 87 $(print_msg) 88 $(make) 89 90.PHONY: tags TAGS 91