mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-10-30 22:03:17 +01:00
Charlie Jenkins
4a73aff8c5
Currently each architecture in perf independently generates syscall headers. Adapt the work that has gone into unifying syscall header implementations in the kernel to work with perf tools. Introduce this framework with riscv at first. riscv previously relied on libaudit, but with this change, perf tools for riscv no longer needs this external dependency. Signed-off-by: Charlie Jenkins <[email protected]> Cc: Adrian Hunter <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Christian Brauner <[email protected]> Cc: Guo Ren <[email protected]> Cc: Günther Noack <[email protected]> Cc: Ian Rogers <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: James Clark <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: John Garry <[email protected]> Cc: Jonathan Corbet <[email protected]> Cc: Leo Yan <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Mickaël Salaün <[email protected]> Cc: Mike Leach <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Palmer Dabbelt <[email protected]> Cc: Paul Walmsley <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Will Deacon <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
129 lines
4.8 KiB
Plaintext
129 lines
4.8 KiB
Plaintext
###
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# build: Generic definitions
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#
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# Lots of this code have been borrowed or heavily inspired from parts
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# of kbuild code, which is not credited, but mostly developed by:
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#
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# Copyright (C) Sam Ravnborg <[email protected]>, 2015
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# Copyright (C) Linus Torvalds <[email protected]>, 2015
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#
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###
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# Convenient variables
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comma := ,
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squote := '
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pound := \#
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empty :=
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space := $(empty) $(empty)
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###
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# Name of target with a '.' as filename prefix. foo/bar.o => foo/.bar.o
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dot-target = $(dir $@).$(notdir $@)
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###
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# filename of target with directory and extension stripped
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basetarget = $(basename $(notdir $@))
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###
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# The temporary file to save gcc -MD generated dependencies must not
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# contain a comma
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depfile = $(subst $(comma),_,$(dot-target).d)
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###
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# Check if both arguments has same arguments. Result is empty string if equal.
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arg-check = $(strip $(filter-out $(cmd_$(1)), $(cmd_$@)) \
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$(filter-out $(cmd_$@), $(cmd_$(1))) )
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###
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# Escape single quote for use in echo statements
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escsq = $(subst $(squote),'\$(squote)',$1)
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# Echo command
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# Short version is used, if $(quiet) equals `quiet_', otherwise full one.
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echo-cmd = $(if $($(quiet)cmd_$(1)),\
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echo ' $(call escsq,$($(quiet)cmd_$(1)))';)
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###
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# Replace >$< with >$$< to preserve $ when reloading the .cmd file
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# (needed for make)
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# Replace >#< with >$(pound)< to avoid starting a comment in the .cmd file
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# (needed for make)
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# Replace >'< with >'\''< to be able to enclose the whole string in '...'
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# (needed for the shell)
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make-cmd = $(call escsq,$(subst $(pound),$$(pound),$(subst $$,$$$$,$(cmd_$(1)))))
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###
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# Find any prerequisites that is newer than target or that does not exist.
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# PHONY targets skipped in both cases.
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any-prereq = $(filter-out $(PHONY),$?) $(filter-out $(PHONY) $(wildcard $^),$^)
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###
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# Copy dependency data into .cmd file
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# - gcc -M dependency info
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# - command line to create object 'cmd_object :='
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dep-cmd = $(if $(wildcard $(fixdep)), \
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$(fixdep) $(depfile) $@ '$(make-cmd)' > $(dot-target).tmp; \
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rm -f $(depfile); \
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mv -f $(dot-target).tmp $(dot-target).cmd, \
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printf '$(pound) cannot find fixdep (%s)\n' $(fixdep) > $(dot-target).cmd; \
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printf '$(pound) using basic dep data\n\n' >> $(dot-target).cmd; \
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cat $(depfile) >> $(dot-target).cmd; \
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printf '\n%s\n' 'cmd_$@ := $(make-cmd)' >> $(dot-target).cmd)
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###
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# if_changed_dep - execute command if any prerequisite is newer than
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# target, or command line has changed and update
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# dependencies in the cmd file
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if_changed_dep = $(if $(strip $(any-prereq) $(arg-check)), \
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@set -e; \
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$(echo-cmd) $(cmd_$(1)); \
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$(dep-cmd))
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# if_changed - execute command if any prerequisite is newer than
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# target, or command line has changed
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if_changed = $(if $(strip $(any-prereq) $(arg-check)), \
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@set -e; \
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$(echo-cmd) $(cmd_$(1)); \
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printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd)
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###
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# C flags to be used in rule definitions, includes:
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# - depfile generation
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# - global $(CFLAGS)
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# - per target C flags
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# - per object C flags
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# - BUILD_STR macro to allow '-D"$(variable)"' constructs
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c_flags_1 = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(CFLAGS) -D"BUILD_STR(s)=\#s" $(CFLAGS_$(basetarget).o) $(CFLAGS_$(obj))
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c_flags_2 = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(c_flags_1))
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c_flags = $(filter-out $(CFLAGS_REMOVE_$(obj)), $(c_flags_2))
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cxx_flags = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(CXXFLAGS) -D"BUILD_STR(s)=\#s" $(CXXFLAGS_$(basetarget).o) $(CXXFLAGS_$(obj))
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###
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## HOSTCC C flags
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host_c_flags = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(HOSTCFLAGS) -D"BUILD_STR(s)=\#s" $(HOSTCFLAGS_$(basetarget).o) $(HOSTCFLAGS_$(obj))
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# output directory for tests below
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TMPOUT = .tmp_$$$$
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# try-run
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# Usage: option = $(call try-run, $(CC)...-o "$$TMP",option-ok,otherwise)
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# Exit code chooses option. "$$TMP" serves as a temporary file and is
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# automatically cleaned up.
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try-run = $(shell set -e; \
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TMP=$(TMPOUT)/tmp; \
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mkdir -p $(TMPOUT); \
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trap "rm -rf $(TMPOUT)" EXIT; \
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if ($(1)) >/dev/null 2>&1; \
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then echo "$(2)"; \
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else echo "$(3)"; \
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fi)
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# cc-option
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# Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586)
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cc-option = $(call try-run, \
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$(CC) -Werror $(1) -c -x c /dev/null -o "$$TMP",$(1),$(2))
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# delete partially updated (i.e. corrupted) files on error
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.DELETE_ON_ERROR:
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