summaryrefslogtreecommitdiffstats
path: root/tools/perf/Makefile
blob: d31a7bbd7cee8610db236c7842cfb5ec63dc56b0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
#
# 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 := $(shell (getconf _NPROCESSORS_ONLN || egrep -c '^processor|^CPU[0-9]' /proc/cpuinfo) 2>/dev/null)
  ifeq ($(JOBS),0)
    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