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.
3 ifneq ($(LLVM),)
4 ifneq ($(filter %/,$(LLVM)),)
5 LLVM_PREFIX := $(LLVM)
6 else ifneq ($(filter -%,$(LLVM)),)
7 LLVM_SUFFIX := $(LLVM)
8 endif
9
10 CLANG := $(LLVM_PREFIX)clang$(LLVM_SUFFIX)
11
12 CLANG_TARGET_FLAGS_arm := arm-linux-gnueabi
13 CLANG_TARGET_FLAGS_arm64 := aarch64-linux-gnu
14 CLANG_TARGET_FLAGS_hexagon := hexagon-linux-musl
15 CLANG_TARGET_FLAGS_i386 := i386-linux-gnu
16 CLANG_TARGET_FLAGS_m68k := m68k-linux-gnu
17 CLANG_TARGET_FLAGS_mips := mipsel-linux-gnu
18 CLANG_TARGET_FLAGS_powerpc := powerpc64le-linux-gnu
19 CLANG_TARGET_FLAGS_riscv := riscv64-linux-gnu
20 CLANG_TARGET_FLAGS_s390 := s390x-linux-gnu
21 CLANG_TARGET_FLAGS_x86 := x86_64-linux-gnu
22 CLANG_TARGET_FLAGS_x86_64 := x86_64-linux-gnu
23
24 # Default to host architecture if ARCH is not explicitly given.
25 ifeq ($(ARCH),)
26 CLANG_TARGET_FLAGS := $(shell $(CLANG) -print-target-triple)
27 else
28 CLANG_TARGET_FLAGS := $(CLANG_TARGET_FLAGS_$(ARCH))
29 endif
30
31 ifeq ($(CROSS_COMPILE),)
32 ifeq ($(CLANG_TARGET_FLAGS),)
33 $(error Specify CROSS_COMPILE or add '--target=' option to lib.mk)
34 else
35 CLANG_FLAGS += --target=$(CLANG_TARGET_FLAGS)
36 endif # CLANG_TARGET_FLAGS
37 else
38 CLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%))
39 endif # 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.
46 CFLAGS += -Wno-address-of-packed-member
47 CFLAGS += -Wno-gnu-variable-sized-type-not-at-end
48
49 CC := $(CLANG) $(CLANG_FLAGS) -fintegrated-as
50 else
51 CC := $(CROSS_COMPILE)gcc
52 endif # LLVM
53
54 ifeq (0,$(MAKELEVEL))
55 ifeq ($(OUTPUT),)
56 OUTPUT := $(shell pwd)
57 DEFAULT_INSTALL_HDR_PATH := 1
58 endif
59 endif
60 selfdir = $(realpath $(dir $(filter %/lib.mk,$(MAKEFILE_LIST))))
61 top_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 # $4 - optional extra arg, emitted as-is, if provided.
68 ifeq ($(V),1)
69 Q =
70 msg =
71 else
72 Q = @
73 msg = @printf ' %-8s%s %s%s\n' "$(1)" "$(if $(2), [$(2)])" "$(notdir $(3))" "$(if $(4), $(4))";
74 MAKEFLAGS += --no-print-directory
75 endif
76
77 ifeq ($(KHDR_INCLUDES),)
78 KHDR_INCLUDES := -isystem $(top_srcdir)/usr/include
79 endif
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).
88 TOOLS_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.
96 TEST_GEN_PROGS := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_PROGS))
97 TEST_GEN_PROGS_EXTENDED := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_PROGS_EXTENDED))
98 TEST_GEN_FILES := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_FILES))
99
100 all: $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES) \
101 $(if $(TEST_GEN_MODS_DIR),gen_mods_dir)
102
103 define RUN_TESTS
104 BASE_DIR="$(selfdir)"; \
105 . $(selfdir)/kselftest/runner.sh; \
106 if [ "X$(summary)" != "X" ]; then \
107 per_test_logging=1; \
108 fi; \
109 run_many $(1)
110 endef
111
112 define 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 )
127 endef
128
129 run_tests: all
130 ifdef 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
141 else
142 @$(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS) $(TEST_PROGS))
143 endif
144
145 gen_mods_dir:
146 $(Q)$(MAKE) -C $(TEST_GEN_MODS_DIR)
147
148 clean_mods_dir:
149 $(Q)$(MAKE) -C $(TEST_GEN_MODS_DIR) clean
150
151 define INSTALL_SINGLE_RULE
152 $(if $(INSTALL_LIST),@mkdir -p $(INSTALL_PATH))
153 $(if $(INSTALL_LIST),rsync -a --copy-unsafe-links $(INSTALL_LIST) $(INSTALL_PATH)/)
154 endef
155
156 define 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))
159 endef
160
161 define 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)
171 endef
172
173 install: all
174 ifdef INSTALL_PATH
175 $(INSTALL_RULE)
176 $(INSTALL_INCLUDES)
177 else
178 $(error Error: set INSTALL_PATH to use install)
179 endif
180
181 emit_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.
188 ifeq ($(RM),)
189 RM := rm -f
190 endif
191
192 define CLEAN
193 $(RM) -r $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES) $(EXTRA_CLEAN)
194 endef
195
196 clean: $(if $(TEST_GEN_MODS_DIR),clean_mods_dir)
197 $(CLEAN)
198
199 # Build with _GNU_SOURCE by default
200 CFLAGS += -D_GNU_SOURCE=
201
202 # Enables to extend CFLAGS and LDFLAGS from command line, e.g.
203 # make USERCFLAGS=-Werror USERLDFLAGS=-static
204 CFLAGS += $(USERCFLAGS)
205 LDFLAGS += $(USERLDFLAGS)
206
207 # When make O= with kselftest target from main level
208 # the following aren't defined.
209 #
210 ifdef building_out_of_srctree
211 LINK.c = $(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) $(TARGET_ARCH)
212 COMPILE.S = $(CC) $(ASFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c
213 LINK.S = $(CC) $(ASFLAGS) $(CPPFLAGS) $(LDFLAGS) $(TARGET_ARCH)
214 endif
215
216 # Selftest makefiles can override those targets by setting
217 # OVERRIDE_TARGETS = 1.
218 ifeq ($(OVERRIDE_TARGETS),)
219 LOCAL_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 $@
229 endif
230
231 .PHONY: run_tests all clean install emit_tests gen_mods_dir clean_mods_dir
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