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) SHUF=1 -f tests/make --no-print-directory
82
83#
84# All other targets get passed through:
85#
86%: FORCE
87	$(print_msg)
88	$(make)
89
90.PHONY: tags TAGS FORCE Makefile
91