1 # SPDX-License-Identifier: GPL-2.0
3 # This is a simple wrapper Makefile that calls the main Makefile.perf
4 # with a -j option to do parallel builds
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.
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:
17 # We don't want to pass along options like -j:
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.
25 # (To override it, run 'make JOBS=1' and similar.)
28 JOBS := $(shell (getconf _NPROCESSORS_ONLN || egrep -c '^processor|^CPU[0-9]' /proc/cpuinfo) 2>/dev/null)
35 # Only pass canonical directory names as the output directory:
38 FULL_O := $(shell cd $(PWD); readlink -f $(O) || echo $(O))
42 # Only accept the 'DEBUG' variable from the command line:
44 ifeq ("$(origin DEBUG)", "command line")
48 SET_DEBUG = "DEBUG=$(DEBUG)"
55 @printf ' BUILD: Doing '\''make \033[33m-j'$(JOBS)'\033[m'\'' parallel build\n'
59 @$(MAKE) -f Makefile.perf --no-print-directory -j$(JOBS) O=$(FULL_O) $(SET_DEBUG) $@
63 # Needed if no target specified:
64 # (Except for tags and TAGS targets. The reason is that the
65 # Makefile does not treat tags/TAGS as targets but as files
66 # and thus won't rebuilt them once they are in place.)
74 ifneq ($(filter clean,$(MAKECMDGOALS)),)
79 rest := $(filter-out clean,$(MAKECMDGOALS))
87 # Explicitly disable parallelism for the clean target.
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
98 # For a full test, use:
100 # make -C tools/perf -f tests/make
103 @$(MAKE) SHUF=1 -f tests/make REUSE_FEATURES_DUMP=1 MK=Makefile SET_PARALLEL=1 --no-print-directory tarpkg out
106 # All other targets get passed through:
112 .PHONY: tags TAGS FORCE Makefile