xref: /linux/tools/testing/selftests/lib.mk (revision a84a0c6a) 
1# This mimics the top-level Makefile. We do it explicitly here so that this
2# Makefile can operate with or without the kbuild infrastructure.
3ifneq ($(LLVM),)
4ifneq ($(filter %/,$(LLVM)),)
5LLVM_PREFIX := $(LLVM)
6else ifneq ($(filter -%,$(LLVM)),)
7LLVM_SUFFIX := $(LLVM)
8endif
9
10CLANG := $(LLVM_PREFIX)clang$(LLVM_SUFFIX)
11
12CLANG_TARGET_FLAGS_arm          := arm-linux-gnueabi
13CLANG_TARGET_FLAGS_arm64        := aarch64-linux-gnu
14CLANG_TARGET_FLAGS_hexagon      := hexagon-linux-musl
15CLANG_TARGET_FLAGS_i386         := i386-linux-gnu
16CLANG_TARGET_FLAGS_m68k         := m68k-linux-gnu
17CLANG_TARGET_FLAGS_mips         := mipsel-linux-gnu
18CLANG_TARGET_FLAGS_powerpc      := powerpc64le-linux-gnu
19CLANG_TARGET_FLAGS_riscv        := riscv64-linux-gnu
20CLANG_TARGET_FLAGS_s390         := s390x-linux-gnu
21CLANG_TARGET_FLAGS_x86          := x86_64-linux-gnu
22CLANG_TARGET_FLAGS_x86_64       := x86_64-linux-gnu
23
24# Default to host architecture if ARCH is not explicitly given.
25ifeq ($(ARCH),)
26CLANG_TARGET_FLAGS := $(shell $(CLANG) -print-target-triple)
27else
28CLANG_TARGET_FLAGS := $(CLANG_TARGET_FLAGS_$(ARCH))
29endif
30
31ifeq ($(CROSS_COMPILE),)
32ifeq ($(CLANG_TARGET_FLAGS),)
33$(error Specify CROSS_COMPILE or add '--target=' option to lib.mk)
34else
35CLANG_FLAGS     += --target=$(CLANG_TARGET_FLAGS)
36endif # CLANG_TARGET_FLAGS
37else
38CLANG_FLAGS     += --target=$(notdir $(CROSS_COMPILE:%-=%))
39endif # CROSS_COMPILE
40
41# gcc defaults to silence (off) for the following warnings, but clang defaults
42# to the opposite. The warnings are not useful for the kernel itself, which is
43# why they have remained disabled in gcc for the main kernel build. And it is
44# only due to including kernel data structures in the selftests, that we get the
45# warnings from clang. Therefore, disable the warnings for clang builds.
46CFLAGS += -Wno-address-of-packed-member
47CFLAGS += -Wno-gnu-variable-sized-type-not-at-end
48
49CC := $(CLANG) $(CLANG_FLAGS) -fintegrated-as
50else
51CC := $(CROSS_COMPILE)gcc
52endif # LLVM
53
54ifeq (0,$(MAKELEVEL))
55    ifeq ($(OUTPUT),)
56	OUTPUT := $(shell pwd)
57	DEFAULT_INSTALL_HDR_PATH := 1
58    endif
59endif
60selfdir = $(realpath $(dir $(filter %/lib.mk,$(MAKEFILE_LIST))))
61top_srcdir = $(selfdir)/../../..
62
63# msg: emit succinct information message describing current building step
64# $1 - generic step name (e.g., CC, LINK, etc);
65# $2 - optional "flavor" specifier; if provided, will be emitted as [flavor];
66# $3 - target (assumed to be file); only file name will be emitted;
67# $4 - optional extra arg, emitted as-is, if provided.
68ifeq ($(V),1)
69Q =
70msg =
71else
72Q = @
73msg = @printf '  %-8s%s %s%s\n' "$(1)" "$(if $(2), [$(2)])" "$(notdir $(3))" "$(if $(4), $(4))";
74MAKEFLAGS += --no-print-directory
75endif
76
77ifeq ($(KHDR_INCLUDES),)
78KHDR_INCLUDES := -isystem $(top_srcdir)/usr/include
79endif
80
81# In order to use newer items that haven't yet been added to the user's system
82# header files, add $(TOOLS_INCLUDES) to the compiler invocation in each
83# each selftest.
84# You may need to add files to that location, or to refresh an existing file. In
85# order to do that, run "make headers" from $(top_srcdir), then copy the
86# header file that you want from $(top_srcdir)/usr/include/... , to the matching
87# subdir in $(TOOLS_INCLUDE).
88TOOLS_INCLUDES := -isystem $(top_srcdir)/tools/include/uapi
89
90# The following are built by lib.mk common compile rules.
91# TEST_CUSTOM_PROGS should be used by tests that require
92# custom build rule and prevent common build rule use.
93# TEST_PROGS are for test shell scripts.
94# TEST_CUSTOM_PROGS and TEST_PROGS will be run by common run_tests
95# and install targets. Common clean doesn't touch them.
96TEST_GEN_PROGS := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_PROGS))
97TEST_GEN_PROGS_EXTENDED := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_PROGS_EXTENDED))
98TEST_GEN_FILES := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_FILES))
99
100all: $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES) \
101	$(if $(TEST_GEN_MODS_DIR),gen_mods_dir)
102
103define RUN_TESTS
104	BASE_DIR="$(selfdir)";			\
105	. $(selfdir)/kselftest/runner.sh;	\
106	if [ "X$(summary)" != "X" ]; then       \
107		per_test_logging=1;		\
108	fi;                                     \
109	run_many $(1)
110endef
111
112define INSTALL_INCLUDES
113	$(if $(TEST_INCLUDES), \
114		relative_files=""; \
115		for entry in $(TEST_INCLUDES); do \
116			entry_dir=$$(readlink -e "$$(dirname "$$entry")"); \
117			entry_name=$$(basename "$$entry"); \
118			relative_dir=$${entry_dir#"$$SRC_PATH"/}; \
119			if [ "$$relative_dir" = "$$entry_dir" ]; then \
120				echo "Error: TEST_INCLUDES entry \"$$entry\" not located inside selftests directory ($$SRC_PATH)" >&2; \
121				exit 1; \
122			fi; \
123			relative_files="$$relative_files $$relative_dir/$$entry_name"; \
124		done; \
125		cd $(SRC_PATH) && rsync -aR $$relative_files $(OBJ_PATH)/ \
126	)
127endef
128
129run_tests: all
130ifdef building_out_of_srctree
131	@if [ "X$(TEST_PROGS)$(TEST_PROGS_EXTENDED)$(TEST_FILES)$(TEST_GEN_MODS_DIR)" != "X" ]; then \
132		rsync -aq --copy-unsafe-links $(TEST_PROGS) $(TEST_PROGS_EXTENDED) $(TEST_FILES) $(TEST_GEN_MODS_DIR) $(OUTPUT); \
133	fi
134	@$(INSTALL_INCLUDES)
135	@if [ "X$(TEST_PROGS)" != "X" ]; then \
136		$(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS) \
137				  $(addprefix $(OUTPUT)/,$(TEST_PROGS))) ; \
138	else \
139		$(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS)); \
140	fi
141else
142	@$(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS) $(TEST_PROGS))
143endif
144
145gen_mods_dir:
146	$(Q)$(MAKE) -C $(TEST_GEN_MODS_DIR)
147
148clean_mods_dir:
149	$(Q)$(MAKE) -C $(TEST_GEN_MODS_DIR) clean
150
151define INSTALL_SINGLE_RULE
152	$(if $(INSTALL_LIST),@mkdir -p $(INSTALL_PATH))
153	$(if $(INSTALL_LIST),rsync -a --copy-unsafe-links $(INSTALL_LIST) $(INSTALL_PATH)/)
154endef
155
156define INSTALL_MODS_RULE
157	$(if $(INSTALL_LIST),@mkdir -p $(INSTALL_PATH)/$(INSTALL_LIST))
158	$(if $(INSTALL_LIST),rsync -a --copy-unsafe-links $(INSTALL_LIST)/*.ko $(INSTALL_PATH)/$(INSTALL_LIST))
159endef
160
161define INSTALL_RULE
162	$(eval INSTALL_LIST = $(TEST_PROGS)) $(INSTALL_SINGLE_RULE)
163	$(eval INSTALL_LIST = $(TEST_PROGS_EXTENDED)) $(INSTALL_SINGLE_RULE)
164	$(eval INSTALL_LIST = $(TEST_FILES)) $(INSTALL_SINGLE_RULE)
165	$(eval INSTALL_LIST = $(TEST_GEN_PROGS)) $(INSTALL_SINGLE_RULE)
166	$(eval INSTALL_LIST = $(TEST_CUSTOM_PROGS)) $(INSTALL_SINGLE_RULE)
167	$(eval INSTALL_LIST = $(TEST_GEN_PROGS_EXTENDED)) $(INSTALL_SINGLE_RULE)
168	$(eval INSTALL_LIST = $(TEST_GEN_FILES)) $(INSTALL_SINGLE_RULE)
169	$(eval INSTALL_LIST = $(notdir $(TEST_GEN_MODS_DIR))) $(INSTALL_MODS_RULE)
170	$(eval INSTALL_LIST = $(wildcard config settings)) $(INSTALL_SINGLE_RULE)
171endef
172
173install: all
174ifdef INSTALL_PATH
175	$(INSTALL_RULE)
176	$(INSTALL_INCLUDES)
177else
178	$(error Error: set INSTALL_PATH to use install)
179endif
180
181emit_tests:
182	for TEST in $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS) $(TEST_PROGS); do \
183		BASENAME_TEST=`basename $$TEST`;	\
184		echo "$(COLLECTION):$$BASENAME_TEST";	\
185	done
186
187# define if isn't already. It is undefined in make O= case.
188ifeq ($(RM),)
189RM := rm -f
190endif
191
192define CLEAN
193	$(RM) -r $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES) $(EXTRA_CLEAN)
194endef
195
196clean: $(if $(TEST_GEN_MODS_DIR),clean_mods_dir)
197	$(CLEAN)
198
199# Build with _GNU_SOURCE by default
200CFLAGS += -D_GNU_SOURCE=
201
202# Enables to extend CFLAGS and LDFLAGS from command line, e.g.
203# make USERCFLAGS=-Werror USERLDFLAGS=-static
204CFLAGS += $(USERCFLAGS)
205LDFLAGS += $(USERLDFLAGS)
206
207# When make O= with kselftest target from main level
208# the following aren't defined.
209#
210ifdef building_out_of_srctree
211LINK.c = $(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) $(TARGET_ARCH)
212COMPILE.S = $(CC) $(ASFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c
213LINK.S = $(CC) $(ASFLAGS) $(CPPFLAGS) $(LDFLAGS) $(TARGET_ARCH)
214endif
215
216# Selftest makefiles can override those targets by setting
217# OVERRIDE_TARGETS = 1.
218ifeq ($(OVERRIDE_TARGETS),)
219LOCAL_HDRS += $(selfdir)/kselftest_harness.h $(selfdir)/kselftest.h
220$(OUTPUT)/%:%.c $(LOCAL_HDRS)
221	$(call msg,CC,,$@)
222	$(Q)$(LINK.c) $(filter-out $(LOCAL_HDRS),$^) $(LDLIBS) -o $@
223
224$(OUTPUT)/%.o:%.S
225	$(COMPILE.S) $^ -o $@
226
227$(OUTPUT)/%:%.S
228	$(LINK.S) $^ $(LDLIBS) -o $@
229endif
230
231.PHONY: run_tests all clean install emit_tests gen_mods_dir clean_mods_dir
232