Makefile

  1# SPDX-License-Identifier: GPL-2.0-only
  2
  3ifeq ($(srctree),)
  4  srctree	:= $(patsubst %/,%,$(dir $(CURDIR)))
  5  srctree	:= $(patsubst %/,%,$(dir $(srctree)))
  6  srctree	:= $(patsubst %/,%,$(dir $(srctree)))
  7endif
  8
  9include $(srctree)/tools/scripts/Makefile.include
 10
 11# O is an alias for OUTPUT
 12OUTPUT          := $(O)
 13
 14ifeq ($(OUTPUT),)
 15  OUTPUT        := $(CURDIR)
 16else
 17  # subdir is used by the ../Makefile in $(call descend,)
 18  ifneq ($(subdir),)
 19    OUTPUT        := $(OUTPUT)/$(subdir)
 20  endif
 21endif
 22
 23ifneq ($(patsubst %/,,$(lastword $(OUTPUT))),)
 24  OUTPUT        := $(OUTPUT)/
 25endif
 26
 27RTLA		:= $(OUTPUT)rtla
 28RTLA_IN		:= $(RTLA)-in.o
 29
 30VERSION		:= $(shell sh -c "make -sC ../../.. kernelversion | grep -v make")
 31DOCSRC		:= ../../../Documentation/tools/rtla/
 32
 33FEATURE_TESTS	:= libtraceevent
 34FEATURE_TESTS	+= libtracefs
 35FEATURE_TESTS	+= libcpupower
 36FEATURE_TESTS	+= libbpf
 37FEATURE_TESTS	+= clang-bpf-co-re
 38FEATURE_TESTS	+= bpftool-skeletons
 39FEATURE_DISPLAY	:= libtraceevent
 40FEATURE_DISPLAY	+= libtracefs
 41FEATURE_DISPLAY	+= libcpupower
 42FEATURE_DISPLAY	+= libbpf
 43FEATURE_DISPLAY	+= clang-bpf-co-re
 44FEATURE_DISPLAY	+= bpftool-skeletons
 45
 46all: $(RTLA)
 47
 48include $(srctree)/tools/build/Makefile.include
 49include Makefile.rtla
 50
 51# check for dependencies only on required targets
 52NON_CONFIG_TARGETS := clean install tarball doc doc_clean doc_install
 53
 54config		:= 1
 55ifdef MAKECMDGOALS
 56ifeq ($(filter-out $(NON_CONFIG_TARGETS),$(MAKECMDGOALS)),)
 57 config		:= 0
 58endif
 59endif
 60
 61ifeq ($(config),1)
 62  include $(srctree)/tools/build/Makefile.feature
 63  include Makefile.config
 64endif
 65
 66CFLAGS		+= $(INCLUDES) $(LIB_INCLUDES)
 67
 68export CFLAGS OUTPUT srctree
 69
 70ifeq ($(BUILD_BPF_SKEL),1)
 71src/timerlat.bpf.o: src/timerlat.bpf.c
 72	$(QUIET_CLANG)$(CLANG) -g -O2 -target bpf -c $(filter %.c,$^) -o $@
 73
 74src/timerlat.skel.h: src/timerlat.bpf.o
 75	$(QUIET_GENSKEL)$(SYSTEM_BPFTOOL) gen skeleton $< > $@
 76else
 77src/timerlat.skel.h:
 78	$(Q)echo '/* BPF skeleton is disabled */' > src/timerlat.skel.h
 79endif
 80
 81$(RTLA): $(RTLA_IN)
 82	$(QUIET_LINK)$(CC) $(LDFLAGS) -o $(RTLA) $(RTLA_IN) $(EXTLIBS)
 83
 84static: $(RTLA_IN)
 85	$(eval LDFLAGS += -static)
 86	$(QUIET_LINK)$(CC) -static $(LDFLAGS) -o $(RTLA)-static $(RTLA_IN)  $(EXTLIBS)
 87
 88rtla.%: fixdep FORCE
 89	make -f $(srctree)/tools/build/Makefile.build dir=. $@
 90
 91$(RTLA_IN): fixdep FORCE src/timerlat.skel.h
 92	make $(build)=rtla
 93
 94clean: doc_clean fixdep-clean
 95	$(call QUIET_CLEAN, rtla)
 96	$(Q)find . -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete
 97	$(Q)rm -f rtla rtla-static fixdep FEATURE-DUMP rtla-*
 98	$(Q)rm -rf feature
 99	$(Q)rm -f src/timerlat.bpf.o src/timerlat.skel.h
100check: $(RTLA)
101	RTLA=$(RTLA) prove -o -f tests/
102.PHONY: FORCE clean check