xref: /linux/tools/testing/selftests/hid/Makefile (revision dbb60c8a26daf388f183f599e1e96de5bb9f96e1) 
1# SPDX-License-Identifier: GPL-2.0
2
3# based on tools/testing/selftest/bpf/Makefile
4include ../../../build/Build.include
5include ../../../scripts/Makefile.arch
6include ../../../scripts/Makefile.include
7
8CXX ?= $(CROSS_COMPILE)g++
9
10CURDIR := $(abspath .)
11TOOLSDIR := $(abspath ../../..)
12TOP_SRCDIR = $(CURDIR)/../../../..
13KHDR_INCLUDES := $(TOP_SRCDIR)/usr/include
14LIBDIR := $(TOOLSDIR)/lib
15BPFDIR := $(LIBDIR)/bpf
16TOOLSINCDIR := $(TOOLSDIR)/include
17BPFTOOLDIR := $(TOOLSDIR)/bpf/bpftool
18HOSTPKG_CONFIG := pkg-config
19
20CFLAGS += -g -O0 -rdynamic -Wall -Werror -I$(KHDR_INCLUDES)
21LDLIBS += -lelf -lz -lrt -lpthread
22
23# Silence some warnings when compiled with clang
24ifneq ($(LLVM),)
25CFLAGS += -Wno-unused-command-line-argument
26endif
27
28# Order correspond to 'make run_tests' order
29TEST_GEN_PROGS = hid_bpf
30
31# Emit succinct information message describing current building step
32# $1 - generic step name (e.g., CC, LINK, etc);
33# $2 - optional "flavor" specifier; if provided, will be emitted as [flavor];
34# $3 - target (assumed to be file); only file name will be emitted;
35# $4 - optional extra arg, emitted as-is, if provided.
36ifeq ($(V),1)
37Q =
38msg =
39else
40Q = @
41msg = @printf '  %-8s%s %s%s\n' "$(1)" "$(if $(2), [$(2)])" "$(notdir $(3))" "$(if $(4), $(4))";
42MAKEFLAGS += --no-print-directory
43submake_extras := feature_display=0
44endif
45
46# override lib.mk's default rules
47OVERRIDE_TARGETS := 1
48override define CLEAN
49	$(call msg,CLEAN)
50	$(Q)$(RM) -r $(TEST_GEN_PROGS)
51	$(Q)$(RM) -r $(EXTRA_CLEAN)
52endef
53
54include ../lib.mk
55
56SCRATCH_DIR := $(OUTPUT)/tools
57BUILD_DIR := $(SCRATCH_DIR)/build
58INCLUDE_DIR := $(SCRATCH_DIR)/include
59BPFOBJ := $(BUILD_DIR)/libbpf/libbpf.a
60ifneq ($(CROSS_COMPILE),)
61HOST_BUILD_DIR		:= $(BUILD_DIR)/host
62HOST_SCRATCH_DIR	:= $(OUTPUT)/host-tools
63HOST_INCLUDE_DIR	:= $(HOST_SCRATCH_DIR)/include
64else
65HOST_BUILD_DIR		:= $(BUILD_DIR)
66HOST_SCRATCH_DIR	:= $(SCRATCH_DIR)
67HOST_INCLUDE_DIR	:= $(INCLUDE_DIR)
68endif
69HOST_BPFOBJ := $(HOST_BUILD_DIR)/libbpf/libbpf.a
70RESOLVE_BTFIDS := $(HOST_BUILD_DIR)/resolve_btfids/resolve_btfids
71
72VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux)				\
73		     $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)	\
74		     ../../../../vmlinux				\
75		     /sys/kernel/btf/vmlinux				\
76		     /boot/vmlinux-$(shell uname -r)
77VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
78ifeq ($(VMLINUX_BTF),)
79$(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)")
80endif
81
82# Define simple and short `make test_progs`, `make test_sysctl`, etc targets
83# to build individual tests.
84# NOTE: Semicolon at the end is critical to override lib.mk's default static
85# rule for binaries.
86$(notdir $(TEST_GEN_PROGS)): %: $(OUTPUT)/% ;
87
88# sort removes libbpf duplicates when not cross-building
89MAKE_DIRS := $(sort $(BUILD_DIR)/libbpf $(HOST_BUILD_DIR)/libbpf		\
90	       $(HOST_BUILD_DIR)/bpftool $(HOST_BUILD_DIR)/resolve_btfids	\
91	       $(INCLUDE_DIR))
92$(MAKE_DIRS):
93	$(call msg,MKDIR,,$@)
94	$(Q)mkdir -p $@
95
96$(OUTPUT)/%.o: %.c
97	$(call msg,CC,,$@)
98	$(Q)$(CC) $(CFLAGS) -c $(filter %.c,$^) $(LDLIBS) -o $@
99
100# LLVM's ld.lld doesn't support all the architectures, so use it only on x86
101ifeq ($(SRCARCH),x86)
102LLD := lld
103else
104LLD := ld
105endif
106
107DEFAULT_BPFTOOL := $(HOST_SCRATCH_DIR)/sbin/bpftool
108
109TEST_GEN_PROGS_EXTENDED += $(DEFAULT_BPFTOOL)
110
111$(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED): $(BPFOBJ)
112
113BPFTOOL ?= $(DEFAULT_BPFTOOL)
114$(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile)    \
115		    $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/bpftool
116	$(Q)$(MAKE) $(submake_extras)  -C $(BPFTOOLDIR)			       \
117		    ARCH= CROSS_COMPILE= CC=$(HOSTCC) LD=$(HOSTLD) 	       \
118		    EXTRA_CFLAGS='-g -O0'				       \
119		    OUTPUT=$(HOST_BUILD_DIR)/bpftool/			       \
120		    LIBBPF_OUTPUT=$(HOST_BUILD_DIR)/libbpf/		       \
121		    LIBBPF_DESTDIR=$(HOST_SCRATCH_DIR)/			       \
122		    prefix= DESTDIR=$(HOST_SCRATCH_DIR)/ install-bin
123
124$(BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile)		       \
125	   $(KHDR_INCLUDES)/linux/bpf.h					       \
126	   | $(BUILD_DIR)/libbpf
127	$(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) OUTPUT=$(BUILD_DIR)/libbpf/ \
128		    EXTRA_CFLAGS='-g -O0'				       \
129		    DESTDIR=$(SCRATCH_DIR) prefix= all install_headers
130
131ifneq ($(BPFOBJ),$(HOST_BPFOBJ))
132$(HOST_BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile)		       \
133		$(KHDR_INCLUDES)/linux/bpf.h					       \
134		| $(HOST_BUILD_DIR)/libbpf
135	$(Q)$(MAKE) $(submake_extras) -C $(BPFDIR)                             \
136		    EXTRA_CFLAGS='-g -O0' ARCH= CROSS_COMPILE=		       \
137		    OUTPUT=$(HOST_BUILD_DIR)/libbpf/ CC=$(HOSTCC) LD=$(HOSTLD) \
138		    DESTDIR=$(HOST_SCRATCH_DIR)/ prefix= all install_headers
139endif
140
141$(INCLUDE_DIR)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) | $(INCLUDE_DIR)
142ifeq ($(VMLINUX_H),)
143	$(call msg,GEN,,$@)
144	$(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@
145else
146	$(call msg,CP,,$@)
147	$(Q)cp "$(VMLINUX_H)" $@
148endif
149
150$(RESOLVE_BTFIDS): $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/resolve_btfids	\
151		       $(TOOLSDIR)/bpf/resolve_btfids/main.c	\
152		       $(TOOLSDIR)/lib/rbtree.c			\
153		       $(TOOLSDIR)/lib/zalloc.c			\
154		       $(TOOLSDIR)/lib/string.c			\
155		       $(TOOLSDIR)/lib/ctype.c			\
156		       $(TOOLSDIR)/lib/str_error_r.c
157	$(Q)$(MAKE) $(submake_extras) -C $(TOOLSDIR)/bpf/resolve_btfids	\
158		CC=$(HOSTCC) LD=$(HOSTLD) AR=$(HOSTAR) \
159		LIBBPF_INCLUDE=$(HOST_INCLUDE_DIR) \
160		OUTPUT=$(HOST_BUILD_DIR)/resolve_btfids/ BPFOBJ=$(HOST_BPFOBJ)
161
162# Get Clang's default includes on this system, as opposed to those seen by
163# '-target bpf'. This fixes "missing" files on some architectures/distros,
164# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
165#
166# Use '-idirafter': Don't interfere with include mechanics except where the
167# build would have failed anyways.
168define get_sys_includes
169$(shell $(1) -v -E - </dev/null 2>&1 \
170	| sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \
171$(shell $(1) -dM -E - </dev/null | grep '__riscv_xlen ' | awk '{printf("-D__riscv_xlen=%d -D__BITS_PER_LONG=%d", $$3, $$3)}')
172endef
173
174# Determine target endianness.
175IS_LITTLE_ENDIAN = $(shell $(CC) -dM -E - </dev/null | \
176			grep 'define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__')
177MENDIAN=$(if $(IS_LITTLE_ENDIAN),-mlittle-endian,-mbig-endian)
178
179CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG))
180BPF_CFLAGS = -g -Werror -D__TARGET_ARCH_$(SRCARCH) $(MENDIAN) 		\
181	     -I$(INCLUDE_DIR) -I$(CURDIR) -I$(KHDR_INCLUDES)		\
182	     -I$(abspath $(OUTPUT)/../usr/include)
183
184CLANG_CFLAGS = $(CLANG_SYS_INCLUDES) \
185	       -Wno-compare-distinct-pointer-types
186
187# Build BPF object using Clang
188# $1 - input .c file
189# $2 - output .o file
190# $3 - CFLAGS
191define CLANG_BPF_BUILD_RULE
192	$(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2)
193	$(Q)$(CLANG) $3 -O2 -target bpf -c $1 -mcpu=v3 -o $2
194endef
195# Similar to CLANG_BPF_BUILD_RULE, but with disabled alu32
196define CLANG_NOALU32_BPF_BUILD_RULE
197	$(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2)
198	$(Q)$(CLANG) $3 -O2 -target bpf -c $1 -mcpu=v2 -o $2
199endef
200# Build BPF object using GCC
201define GCC_BPF_BUILD_RULE
202	$(call msg,GCC-BPF,$(TRUNNER_BINARY),$2)
203	$(Q)$(BPF_GCC) $3 -O2 -c $1 -o $2
204endef
205
206BPF_PROGS_DIR := progs
207BPF_BUILD_RULE := CLANG_BPF_BUILD_RULE
208BPF_SRCS := $(notdir $(wildcard $(BPF_PROGS_DIR)/*.c))
209BPF_OBJS := $(patsubst %.c,$(OUTPUT)/%.bpf.o, $(BPF_SRCS))
210BPF_SKELS := $(patsubst %.c,$(OUTPUT)/%.skel.h, $(BPF_SRCS))
211TEST_GEN_FILES += $(BPF_OBJS)
212
213$(BPF_PROGS_DIR)-bpfobjs := y
214$(BPF_OBJS): $(OUTPUT)/%.bpf.o:				\
215	     $(BPF_PROGS_DIR)/%.c			\
216	     $(wildcard $(BPF_PROGS_DIR)/*.h)		\
217	     $(INCLUDE_DIR)/vmlinux.h				\
218	     $(wildcard $(BPFDIR)/hid_bpf_*.h)			\
219	     $(wildcard $(BPFDIR)/*.bpf.h)			\
220	     | $(OUTPUT) $(BPFOBJ)
221	$(call $(BPF_BUILD_RULE),$<,$@, $(BPF_CFLAGS))
222
223$(BPF_SKELS): %.skel.h: %.bpf.o $(BPFTOOL) | $(OUTPUT)
224	$(call msg,GEN-SKEL,$(BINARY),$@)
225	$(Q)$(BPFTOOL) gen object $(<:.o=.linked1.o) $<
226	$(Q)$(BPFTOOL) gen skeleton $(<:.o=.linked1.o) name $(notdir $(<:.bpf.o=)) > $@
227
228$(OUTPUT)/%:%.c $(BPF_SKELS)
229	$(call msg,BINARY,,$@)
230	$(Q)$(LINK.c) $^ $(LDLIBS) -o $@
231
232EXTRA_CLEAN := $(SCRATCH_DIR) $(HOST_SCRATCH_DIR) feature bpftool	\
233	$(addprefix $(OUTPUT)/,*.o *.skel.h no_alu32)
234