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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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CLANG := $(LLVM_PREFIX)clang$(LLVM_SUFFIX)
CLANG_TARGET_FLAGS_arm := arm-linux-gnueabiCLANG_TARGET_FLAGS_arm64 := aarch64-linux-gnuCLANG_TARGET_FLAGS_hexagon := hexagon-linux-muslCLANG_TARGET_FLAGS_i386 := i386-linux-gnuCLANG_TARGET_FLAGS_m68k := m68k-linux-gnuCLANG_TARGET_FLAGS_mips := mipsel-linux-gnuCLANG_TARGET_FLAGS_powerpc := powerpc64le-linux-gnuCLANG_TARGET_FLAGS_riscv := riscv64-linux-gnuCLANG_TARGET_FLAGS_s390 := s390x-linux-gnuCLANG_TARGET_FLAGS_x86 := x86_64-linux-gnuCLANG_TARGET_FLAGS_x86_64 := x86_64-linux-gnu
# Default to host architecture if ARCH is not explicitly given.ifeq ($(ARCH),)CLANG_TARGET_FLAGS := $(shell $(CLANG) -print-target-triple)elseCLANG_TARGET_FLAGS := $(CLANG_TARGET_FLAGS_$(ARCH))endif
ifeq ($(CROSS_COMPILE),)ifeq ($(CLANG_TARGET_FLAGS),)$(error Specify CROSS_COMPILE or add '--target=' option to lib.mk)elseCLANG_FLAGS += --target=$(CLANG_TARGET_FLAGS)endif # CLANG_TARGET_FLAGSelseCLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%))endif # CROSS_COMPILE
# gcc defaults to silence (off) for the following warnings, but clang defaults# to the opposite. The warnings are not useful for the kernel itself, which is# why they have remained disabled in gcc for the main kernel build. And it is# only due to including kernel data structures in the selftests, that we get the# warnings from clang. Therefore, disable the warnings for clang builds.CFLAGS += -Wno-address-of-packed-memberCFLAGS += -Wno-gnu-variable-sized-type-not-at-end
CC := $(CLANG) $(CLANG_FLAGS) -fintegrated-aselseCC := $(CROSS_COMPILE)gccendif # LLVM
ifeq (0,$(MAKELEVEL)) ifeq ($(OUTPUT),) OUTPUT := $(shell pwd) DEFAULT_INSTALL_HDR_PATH := 1 endifendifselfdir = $(realpath $(dir $(filter %/lib.mk,$(MAKEFILE_LIST))))top_srcdir = $(selfdir)/../../..
# msg: emit succinct information message describing current building step# $1 - generic step name (e.g., CC, LINK, etc);# $2 - optional "flavor" specifier; if provided, will be emitted as [flavor];# $3 - target (assumed to be file); only file name will be emitted;# $4 - optional extra arg, emitted as-is, if provided.ifeq ($(V),1)Q =msg =elseQ = @msg = @printf ' %-8s%s %s%s\n' "$(1)" "$(if $(2), [$(2)])" "$(notdir $(3))" "$(if $(4), $(4))";MAKEFLAGS += --no-print-directoryendif
ifeq ($(KHDR_INCLUDES),)KHDR_INCLUDES := -isystem $(top_srcdir)/usr/includeendif
# In order to use newer items that haven't yet been added to the user's system# header files, add $(TOOLS_INCLUDES) to the compiler invocation in each# each selftest.# You may need to add files to that location, or to refresh an existing file. In# order to do that, run "make headers" from $(top_srcdir), then copy the# header file that you want from $(top_srcdir)/usr/include/... , to the matching# subdir in $(TOOLS_INCLUDE).TOOLS_INCLUDES := -isystem $(top_srcdir)/tools/include/uapi
# The following are built by lib.mk common compile rules.# TEST_CUSTOM_PROGS should be used by tests that require# custom build rule and prevent common build rule use.# TEST_PROGS are for test shell scripts.# TEST_CUSTOM_PROGS and TEST_PROGS will be run by common run_tests# and install targets. Common clean doesn't touch them.TEST_GEN_PROGS := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_PROGS))TEST_GEN_PROGS_EXTENDED := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_PROGS_EXTENDED))TEST_GEN_FILES := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_FILES))
all: $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES) \ $(if $(TEST_GEN_MODS_DIR),gen_mods_dir)
define RUN_TESTS BASE_DIR="$(selfdir)"; \ . $(selfdir)/kselftest/runner.sh; \ if [ "X$(summary)" != "X" ]; then \ per_test_logging=1; \ fi; \ run_many $(1)endef
define INSTALL_INCLUDES $(if $(TEST_INCLUDES), \ relative_files=""; \ for entry in $(TEST_INCLUDES); do \ entry_dir=$$(readlink -e "$$(dirname "$$entry")"); \ entry_name=$$(basename "$$entry"); \ relative_dir=$${entry_dir#"$$SRC_PATH"/}; \ if [ "$$relative_dir" = "$$entry_dir" ]; then \ echo "Error: TEST_INCLUDES entry \"$$entry\" not located inside selftests directory ($$SRC_PATH)" >&2; \ exit 1; \ fi; \ relative_files="$$relative_files $$relative_dir/$$entry_name"; \ done; \ cd $(SRC_PATH) && rsync -aR $$relative_files $(OBJ_PATH)/ \ )endef
run_tests: allifdef building_out_of_srctree @if [ "X$(TEST_PROGS)$(TEST_PROGS_EXTENDED)$(TEST_FILES)$(TEST_GEN_MODS_DIR)" != "X" ]; then \ rsync -aq --copy-unsafe-links $(TEST_PROGS) $(TEST_PROGS_EXTENDED) $(TEST_FILES) $(TEST_GEN_MODS_DIR) $(OUTPUT); \ fi @$(INSTALL_INCLUDES) @if [ "X$(TEST_PROGS)" != "X" ]; then \ $(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS) \ $(addprefix $(OUTPUT)/,$(TEST_PROGS))) ; \ else \ $(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS)); \ fielse @$(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS) $(TEST_PROGS))endif
gen_mods_dir: $(Q)$(MAKE) -C $(TEST_GEN_MODS_DIR)
clean_mods_dir: $(Q)$(MAKE) -C $(TEST_GEN_MODS_DIR) clean
define INSTALL_SINGLE_RULE $(if $(INSTALL_LIST),@mkdir -p $(INSTALL_PATH)) $(if $(INSTALL_LIST),rsync -a --copy-unsafe-links $(INSTALL_LIST) $(INSTALL_PATH)/)endef
define INSTALL_MODS_RULE $(if $(INSTALL_LIST),@mkdir -p $(INSTALL_PATH)/$(INSTALL_LIST)) $(if $(INSTALL_LIST),rsync -a --copy-unsafe-links $(INSTALL_LIST)/*.ko $(INSTALL_PATH)/$(INSTALL_LIST))endef
define INSTALL_RULE $(eval INSTALL_LIST = $(TEST_PROGS)) $(INSTALL_SINGLE_RULE) $(eval INSTALL_LIST = $(TEST_PROGS_EXTENDED)) $(INSTALL_SINGLE_RULE) $(eval INSTALL_LIST = $(TEST_FILES)) $(INSTALL_SINGLE_RULE) $(eval INSTALL_LIST = $(TEST_GEN_PROGS)) $(INSTALL_SINGLE_RULE) $(eval INSTALL_LIST = $(TEST_CUSTOM_PROGS)) $(INSTALL_SINGLE_RULE) $(eval INSTALL_LIST = $(TEST_GEN_PROGS_EXTENDED)) $(INSTALL_SINGLE_RULE) $(eval INSTALL_LIST = $(TEST_GEN_FILES)) $(INSTALL_SINGLE_RULE) $(eval INSTALL_LIST = $(notdir $(TEST_GEN_MODS_DIR))) $(INSTALL_MODS_RULE) $(eval INSTALL_LIST = $(wildcard config settings)) $(INSTALL_SINGLE_RULE)endef
install: allifdef INSTALL_PATH $(INSTALL_RULE) $(INSTALL_INCLUDES)else $(error Error: set INSTALL_PATH to use install)endif
emit_tests: for TEST in $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS) $(TEST_PROGS); do \ BASENAME_TEST=`basename $$TEST`; \ echo "$(COLLECTION):$$BASENAME_TEST"; \ done
# define if isn't already. It is undefined in make O= case.ifeq ($(RM),)RM := rm -fendif
define CLEAN $(RM) -r $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES) $(EXTRA_CLEAN)endef
clean: $(if $(TEST_GEN_MODS_DIR),clean_mods_dir) $(CLEAN)
# Build with _GNU_SOURCE by defaultCFLAGS += -D_GNU_SOURCE=
# Additional include paths needed by kselftest.h and local headersCFLAGS += -I${top_srcdir}/tools/testing/selftests
# Enables to extend CFLAGS and LDFLAGS from command line, e.g.# make USERCFLAGS=-Werror USERLDFLAGS=-staticCFLAGS += $(USERCFLAGS)LDFLAGS += $(USERLDFLAGS)
# When make O= with kselftest target from main level# the following aren't defined.#ifdef building_out_of_srctreeLINK.c = $(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) $(TARGET_ARCH)COMPILE.S = $(CC) $(ASFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -cLINK.S = $(CC) $(ASFLAGS) $(CPPFLAGS) $(LDFLAGS) $(TARGET_ARCH)endif
# Selftest makefiles can override those targets by setting# OVERRIDE_TARGETS = 1.ifeq ($(OVERRIDE_TARGETS),)LOCAL_HDRS += $(selfdir)/kselftest_harness.h $(selfdir)/kselftest.h$(OUTPUT)/%:%.c $(LOCAL_HDRS) $(call msg,CC,,$@) $(Q)$(LINK.c) $(filter-out $(LOCAL_HDRS),$^) $(LDLIBS) -o $@
$(OUTPUT)/%.o:%.S $(COMPILE.S) $^ -o $@
$(OUTPUT)/%:%.S $(LINK.S) $^ $(LDLIBS) -o $@endif
# Extract the expected header directorykhdr_output := $(patsubst %/usr/include,%,$(filter %/usr/include,$(KHDR_INCLUDES)))
headers: $(Q)$(MAKE) -f $(top_srcdir)/Makefile -C $(khdr_output) headers
.PHONY: run_tests all clean install emit_tests gen_mods_dir clean_mods_dir headers