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https://github.com/torvalds/linux
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da15fc2fa9
The Yocto build system does a 'make clean' when rebuilding due to changed dependencies, and that consistently fails for me (causing the whole BSP build to fail) with errors such as | find: '[...]/perf/1.0-r9/perf-1.0/plugin_mac80211.so': No such file or directory | find: '[...]/perf/1.0-r9/perf-1.0/plugin_mac80211.so': No such file or directory | find: find: '[...]/perf/1.0-r9/perf-1.0/libtraceevent.a''[...]/perf/1.0-r9/perf-1.0/libtraceevent.a': No such file or directory: No such file or directory | [...] | find: cannot delete '/mnt/xfs/devel/pil/yocto/tmp-glibc/work/wandboard-oe-linux-gnueabi/perf/1.0-r9/perf-1.0/util/.pstack.o.cmd': No such file or directory Apparently (despite the comment), 'make clean' ends up launching multiple sub-makes that all want to remove the same things - perhaps this only happens in combination with a O=... parameter. In any case, we don't lose much by explicitly disabling the parallelism for the clean target, and it makes automated builds much more reliable. Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20180705131527.19749-1-linux@rasmusvillemoes.dk Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
112 lines
2.5 KiB
Makefile
112 lines
2.5 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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#
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# This is a simple wrapper Makefile that calls the main Makefile.perf
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# with a -j option to do parallel builds
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#
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# If you want to invoke the perf build in some non-standard way then
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# you can use the 'make -f Makefile.perf' method to invoke it.
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#
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#
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# Clear out the built-in rules GNU make defines by default (such as .o targets),
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# so that we pass through all targets to Makefile.perf:
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#
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.SUFFIXES:
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#
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# We don't want to pass along options like -j:
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#
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unexport MAKEFLAGS
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#
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# Do a parallel build with multiple jobs, based on the number of CPUs online
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# in this system: 'make -j8' on a 8-CPU system, etc.
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#
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# (To override it, run 'make JOBS=1' and similar.)
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#
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ifeq ($(JOBS),)
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JOBS := $(shell (getconf _NPROCESSORS_ONLN || egrep -c '^processor|^CPU[0-9]' /proc/cpuinfo) 2>/dev/null)
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ifeq ($(JOBS),0)
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JOBS := 1
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endif
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endif
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#
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# Only pass canonical directory names as the output directory:
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#
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ifneq ($(O),)
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FULL_O := $(shell readlink -f $(O) || echo $(O))
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endif
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#
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# Only accept the 'DEBUG' variable from the command line:
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#
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ifeq ("$(origin DEBUG)", "command line")
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ifeq ($(DEBUG),)
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override DEBUG = 0
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else
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SET_DEBUG = "DEBUG=$(DEBUG)"
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endif
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else
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override DEBUG = 0
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endif
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define print_msg
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@printf ' BUILD: Doing '\''make \033[33m-j'$(JOBS)'\033[m'\'' parallel build\n'
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endef
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define make
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@$(MAKE) -f Makefile.perf --no-print-directory -j$(JOBS) O=$(FULL_O) $(SET_DEBUG) $@
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endef
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#
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# Needed if no target specified:
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# (Except for tags and TAGS targets. The reason is that the
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# Makefile does not treat tags/TAGS as targets but as files
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# and thus won't rebuilt them once they are in place.)
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#
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all tags TAGS:
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$(print_msg)
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$(make)
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ifdef MAKECMDGOALS
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has_clean := 0
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ifneq ($(filter clean,$(MAKECMDGOALS)),)
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has_clean := 1
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endif # clean
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ifeq ($(has_clean),1)
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rest := $(filter-out clean,$(MAKECMDGOALS))
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ifneq ($(rest),)
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$(rest): clean
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endif # rest
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endif # has_clean
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endif # MAKECMDGOALS
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#
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# Explicitly disable parallelism for the clean target.
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#
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clean:
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$(make) -j1
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#
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# The build-test target is not really parallel, don't print the jobs info,
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# it also uses only the tests/make targets that don't pollute the source
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# repository, i.e. that uses O= or builds the tarpkg outside the source
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# repo directories.
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#
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# For a full test, use:
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#
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# make -C tools/perf -f tests/make
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#
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build-test:
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@$(MAKE) SHUF=1 -f tests/make REUSE_FEATURES_DUMP=1 MK=Makefile SET_PARALLEL=1 --no-print-directory tarpkg out
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#
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# All other targets get passed through:
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#
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%: FORCE
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$(print_msg)
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$(make)
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.PHONY: tags TAGS FORCE Makefile
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