1 # SPDX-License-Identifier: GPL-2.0
2 #
3 # This is a simple wrapper Makefile that calls
4 # with a -j option to do parallel builds
5 #
6 # If you want to invoke the perf build in some
7 # you can use the 'make -f Makefile.perf' meth
8 #
9
10 #
11 # Clear out the built-in rules GNU make define
12 # so that we pass through all targets to Makef
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, base
23 # in this system: 'make -j8' on a 8-CPU system
24 #
25 # (To override it, run 'make JOBS=1' and simil
26 #
27 ifeq ($(JOBS),)
28 JOBS := $(shell (getconf _NPROCESSORS_ONLN |
29 ifeq ($(JOBS),0)
30 JOBS := 1
31 endif
32 endif
33
34 #
35 # Only pass canonical directory names as the o
36 #
37 ifneq ($(O),)
38 FULL_O := $(shell cd $(PWD); readlink -f $(O
39 endif
40
41 #
42 # Only accept the 'DEBUG' variable from the co
43 #
44 ifeq ("$(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 ifeq ($(JOBS),1)
55 BUILD_TYPE := sequential
56 else
57 BUILD_TYPE := parallel
58 endif
59
60 define print_msg
61 @printf ' BUILD: Doing '\''make \033[33m-
62 endef
63
64 define make
65 @$(MAKE) -f Makefile.perf --no-print-directo
66 endef
67
68 #
69 # Needed if no target specified:
70 # (Except for tags and TAGS targets. The reaso
71 # Makefile does not treat tags/TAGS as targets
72 # and thus won't rebuilt them once they are in
73 #
74 all tags TAGS:
75 $(print_msg)
76 $(make)
77
78 ifdef MAKECMDGOALS
79 has_clean := 0
80 ifneq ($(filter clean,$(MAKECMDGOALS)),)
81 has_clean := 1
82 endif # clean
83
84 ifeq ($(has_clean),1)
85 rest := $(filter-out clean,$(MAKECMDGOALS))
86 ifneq ($(rest),)
87 $(rest): clean
88 endif # rest
89 endif # has_clean
90 endif # MAKECMDGOALS
91
92 #
93 # Explicitly disable parallelism for the clean
94 #
95 clean:
96 $(make) -j1
97
98 #
99 # The build-test target is not really parallel
100 # it also uses only the tests/make targets tha
101 # repository, i.e. that uses O= or builds the
102 # repo directories.
103 #
104 # For a full test, use:
105 #
106 # make -C tools/perf -f tests/make
107 #
108 build-test:
109 @$(MAKE) SHUF=1 -f tests/make REUSE_FE
110
111 build-test-tarball:
112 @$(MAKE) -f tests/make REUSE_FEATURES_
113
114 #
115 # All other targets get passed through:
116 #
117 %: FORCE
118 $(print_msg)
119 $(make)
120
121 .PHONY: tags TAGS FORCE Makefile
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