tools/perf/Makefile

   1 # SPDX-License-Identifier: GPL-2.0
   2 #
   3 # This is a simple wrapper Makefile that calls the main Makefile.perf
   4 # with a -j option to do parallel builds
   5 #
   6 # If you want to invoke the perf build in some non-standard way then
   7 # you can use the 'make -f Makefile.perf' method to invoke it.
   8 #
   9
  10 #
  11 # Clear out the built-in rules GNU make defines by default (such as .o targets),
  12 # so that we pass through all targets to Makefile.perf:
  13 #
  14 .SUFFIXES:
  15
  16 #
  17 # We don't want to pass along options like -j:
  18 #
  19 unexport MAKEFLAGS
  20
  21 #
  22 # Do a parallel build with multiple jobs, based on the number of CPUs online
  23 # in this system: 'make -j8' on a 8-CPU system, etc.
  24 #
  25 # (To override it, run 'make JOBS=1' and similar.)
  26 #
  27 ifeq ($(JOBS),)
  28   JOBS := $(shell (getconf _NPROCESSORS_ONLN || egrep -c '^processor|^CPU[0-9]' /proc/cpuinfo) 2>/dev/null)
  29   ifeq ($(JOBS),0)
  30     JOBS := 1
  31   endif
  32 endif
  33
  34 #
  35 # Only pass canonical directory names as the output directory:
  36 #
  37 ifneq ($(O),)
  38   FULL_O := $(shell cd $(PWD); readlink -f $(O) || echo $(O))
  39 endif
  40
  41 #
  42 # Only accept the 'DEBUG' variable from the command line:
  43 #
  44 ifeq ("$(origin DEBUG)", "command line")
  45   ifeq ($(DEBUG),)
  46     override DEBUG = 0
  47   else
  48     SET_DEBUG = "DEBUG=$(DEBUG)"
  49   endif
  50 else
  51   override DEBUG = 0
  52 endif
  53
  54 define print_msg
  55   @printf '  BUILD:   Doing '\''make \033[33m-j'$(JOBS)'\033[m'\'' parallel build\n'
  56 endef
  57
  58 define make
  59   @$(MAKE) -f Makefile.perf --no-print-directory -j$(JOBS) O=$(FULL_O) $(SET_DEBUG) $@
  60 endef
  61
  62 #
  63 # Needed if no target specified:
  64 # (Except for tags and TAGS targets. The reason is that the
  65 # Makefile does not treat tags/TAGS as targets but as files
  66 # and thus won't rebuilt them once they are in place.)
  67 #
  68 all tags TAGS:
  69         $(print_msg)
  70         $(make)
  71
  72 ifdef MAKECMDGOALS
  73 has_clean := 0
  74 ifneq ($(filter clean,$(MAKECMDGOALS)),)
  75   has_clean := 1
  76 endif # clean
  77
  78 ifeq ($(has_clean),1)
  79   rest := $(filter-out clean,$(MAKECMDGOALS))
  80   ifneq ($(rest),)
  81 $(rest): clean
  82   endif # rest
  83 endif # has_clean
  84 endif # MAKECMDGOALS
  85
  86 #
  87 # Explicitly disable parallelism for the clean target.
  88 #
  89 clean:
  90         $(make) -j1
  91
  92 #
  93 # The build-test target is not really parallel, don't print the jobs info,
  94 # it also uses only the tests/make targets that don't pollute the source
  95 # repository, i.e. that uses O= or builds the tarpkg outside the source
  96 # repo directories.
  97 #
  98 # For a full test, use:
  99 #
 100 # make -C tools/perf -f tests/make
 101 #
 102 build-test:
 103         @$(MAKE) SHUF=1 -f tests/make REUSE_FEATURES_DUMP=1 MK=Makefile SET_PARALLEL=1 --no-print-directory tarpkg out
 104
 105 #
 106 # All other targets get passed through:
 107 #
 108 %: FORCE
 109         $(print_msg)
 110         $(make)
 111
 112 .PHONY: tags TAGS FORCE Makefile