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Linux/samples/hid/Makefile

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Diff markup

Differences between /samples/hid/Makefile (Version linux-6.12-rc7) and /samples/hid/Makefile (Version linux-5.5.19)


  1 # SPDX-License-Identifier: GPL-2.0                
  2                                                   
  3 HID_SAMPLES_PATH ?= $(abspath $(src))             
  4 TOOLS_PATH := $(HID_SAMPLES_PATH)/../../tools     
  5                                                   
  6 pound := \#                                       
  7                                                   
  8 # List of programs to build                       
  9 tprogs-y += hid_mouse                             
 10 tprogs-y += hid_surface_dial                      
 11                                                   
 12 # Libbpf dependencies                             
 13 LIBBPF_SRC = $(TOOLS_PATH)/lib/bpf                
 14 LIBBPF_OUTPUT = $(abspath $(HID_SAMPLES_PATH))    
 15 LIBBPF_DESTDIR = $(LIBBPF_OUTPUT)                 
 16 LIBBPF_INCLUDE = $(LIBBPF_DESTDIR)/include        
 17 LIBBPF = $(LIBBPF_OUTPUT)/libbpf.a                
 18                                                   
 19 EXTRA_BPF_HEADERS := hid_bpf_helpers.h            
 20                                                   
 21 hid_mouse-objs := hid_mouse.o                     
 22 hid_surface_dial-objs := hid_surface_dial.o       
 23                                                   
 24 # Tell kbuild to always build the programs        
 25 always-y := $(tprogs-y)                           
 26                                                   
 27 ifeq ($(ARCH), arm)                               
 28 # Strip all except -D__LINUX_ARM_ARCH__ option    
 29 # headers when arm instruction set identificat    
 30 ARM_ARCH_SELECTOR := $(filter -D__LINUX_ARM_AR    
 31 BPF_EXTRA_CFLAGS := $(ARM_ARCH_SELECTOR)          
 32 TPROGS_CFLAGS += $(ARM_ARCH_SELECTOR)             
 33 endif                                             
 34                                                   
 35 ifeq ($(ARCH), mips)                              
 36 TPROGS_CFLAGS += -D__SANE_USERSPACE_TYPES__       
 37 ifdef CONFIG_MACH_LOONGSON64                      
 38 BPF_EXTRA_CFLAGS += -I$(srctree)/arch/mips/inc    
 39 BPF_EXTRA_CFLAGS += -I$(srctree)/arch/mips/inc    
 40 endif                                             
 41 endif                                             
 42                                                   
 43 TPROGS_CFLAGS += -Wall -O2                        
 44 TPROGS_CFLAGS += -Wmissing-prototypes             
 45 TPROGS_CFLAGS += -Wstrict-prototypes              
 46                                                   
 47 TPROGS_CFLAGS += -I$(objtree)/usr/include         
 48 TPROGS_CFLAGS += -I$(LIBBPF_INCLUDE)              
 49 TPROGS_CFLAGS += -I$(srctree)/tools/include       
 50                                                   
 51 ifdef SYSROOT                                     
 52 TPROGS_CFLAGS += --sysroot=$(SYSROOT)             
 53 TPROGS_LDFLAGS := -L$(SYSROOT)/usr/lib            
 54 endif                                             
 55                                                   
 56 TPROGS_LDLIBS                   += $(LIBBPF) -    
 57                                                   
 58 # Allows pointing LLC/CLANG to a LLVM backend     
 59 # make M=samples/bpf LLC=~/git/llvm-project/ll    
 60 LLC ?= llc                                        
 61 CLANG ?= clang                                    
 62 OPT ?= opt                                        
 63 LLVM_DIS ?= llvm-dis                              
 64 LLVM_OBJCOPY ?= llvm-objcopy                      
 65 LLVM_READELF ?= llvm-readelf                      
 66 BTF_PAHOLE ?= pahole                              
 67                                                   
 68 # Detect that we're cross compiling and use th    
 69 ifdef CROSS_COMPILE                               
 70 CLANG_ARCH_ARGS = --target=$(notdir $(CROSS_CO    
 71 endif                                             
 72                                                   
 73 # Don't evaluate probes and warnings if we nee    
 74 ifneq ($(src),)                                   
 75 HDR_PROBE := $(shell printf "$(pound)include <    
 76         $(CC) $(TPROGS_CFLAGS) $(TPROGS_LDFLAG    
 77         -o /dev/null 2>/dev/null && echo okay)    
 78                                                   
 79 ifeq ($(HDR_PROBE),)                              
 80 $(warning WARNING: Detected possible issues wi    
 81 $(warning WARNING: Please install kernel heade    
 82 endif                                             
 83                                                   
 84 BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -ma    
 85 BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --he    
 86 BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) -    
 87 BTF_LLVM_PROBE := $(shell echo "int main() { r    
 88                           $(CLANG) --target=bp    
 89                           $(LLVM_READELF) -S .    
 90                           /bin/rm -f ./llvm_bt    
 91                                                   
 92 BPF_EXTRA_CFLAGS += -fno-stack-protector          
 93 ifneq ($(BTF_LLVM_PROBE),)                        
 94         BPF_EXTRA_CFLAGS += -g                    
 95 else                                              
 96 ifneq ($(and $(BTF_LLC_PROBE),$(BTF_PAHOLE_PRO    
 97         BPF_EXTRA_CFLAGS += -g                    
 98         LLC_FLAGS += -mattr=dwarfris              
 99         DWARF2BTF = y                             
100 endif                                             
101 endif                                             
102 endif                                             
103                                                   
104 # Trick to allow make to be run from this dire    
105 all:                                              
106         $(MAKE) -C ../../ M=$(CURDIR) HID_SAMP    
107                                                   
108 clean:                                            
109         $(MAKE) -C ../../ M=$(CURDIR) clean       
110         @find $(CURDIR) -type f -name '*~' -de    
111         @$(RM) -r $(CURDIR)/libbpf $(CURDIR)/b    
112                                                   
113 $(LIBBPF): $(wildcard $(LIBBPF_SRC)/*.[ch] $(L    
114 # Fix up variables inherited from Kbuild that     
115         $(MAKE) -C $(LIBBPF_SRC) RM='rm -rf' E    
116                 LDFLAGS=$(TPROGS_LDFLAGS) srct    
117                 O= OUTPUT=$(LIBBPF_OUTPUT)/ DE    
118                 $@ install_headers                
119                                                   
120 BPFTOOLDIR := $(TOOLS_PATH)/bpf/bpftool           
121 BPFTOOL_OUTPUT := $(abspath $(HID_SAMPLES_PATH    
122 BPFTOOL := $(BPFTOOL_OUTPUT)/bootstrap/bpftool    
123 $(BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(    
124         $(MAKE) -C $(BPFTOOLDIR) srctree=$(HID    
125                 OUTPUT=$(BPFTOOL_OUTPUT)/ boot    
126                                                   
127 $(LIBBPF_OUTPUT) $(BPFTOOL_OUTPUT):               
128         $(call msg,MKDIR,$@)                      
129         $(Q)mkdir -p $@                           
130                                                   
131 FORCE:                                            
132                                                   
133                                                   
134 # Verify LLVM compiler tools are available and    
135 .PHONY: verify_cmds verify_target_bpf $(CLANG)    
136                                                   
137 verify_cmds: $(CLANG) $(LLC)                      
138         @for TOOL in $^ ; do \                    
139                 if ! (which -- "$${TOOL}" > /d    
140                         echo "*** ERROR: Canno    
141                         exit 1; \                 
142                 else true; fi; \                  
143         done                                      
144                                                   
145 verify_target_bpf: verify_cmds                    
146         @if ! (${LLC} -march=bpf -mattr=help >    
147                 echo "*** ERROR: LLVM (${LLC})    
148                 echo "   NOTICE: LLVM version     
149                 exit 2; \                         
150         else true; fi                             
151                                                   
152 $(HID_SAMPLES_PATH)/*.c: verify_target_bpf $(L    
153 $(src)/*.c: verify_target_bpf $(LIBBPF)           
154                                                   
155 libbpf_hdrs: $(LIBBPF)                            
156                                                   
157 .PHONY: libbpf_hdrs                               
158                                                   
159 $(obj)/hid_mouse.o: $(obj)/hid_mouse.skel.h       
160 $(obj)/hid_surface_dial.o: $(obj)/hid_surface_    
161                                                   
162 -include $(HID_SAMPLES_PATH)/Makefile.target      
163                                                   
164 VMLINUX_BTF_PATHS ?= $(abspath $(if $(O),$(O)/    
165                      $(abspath $(if $(KBUILD_O    
166                      $(abspath ./vmlinux)         
167 VMLINUX_BTF ?= $(abspath $(firstword $(wildcar    
168                                                   
169 $(obj)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL)       
170 ifeq ($(VMLINUX_H),)                              
171 ifeq ($(VMLINUX_BTF),)                            
172         $(error Cannot find a vmlinux for VMLI    
173                 build the kernel or set VMLINU    
174 endif                                             
175         $(Q)$(BPFTOOL) btf dump file $(VMLINUX    
176 else                                              
177         $(Q)cp "$(VMLINUX_H)" $@                  
178 endif                                             
179                                                   
180 clean-files += vmlinux.h                          
181                                                   
182 # Get Clang's default includes on this system,    
183 # '--target=bpf'. This fixes "missing" files o    
184 # such as asm/byteorder.h, asm/socket.h, asm/s    
185 #                                                 
186 # Use '-idirafter': Don't interfere with inclu    
187 # build would have failed anyways.                
188 define get_sys_includes                           
189 $(shell $(1) -v -E - </dev/null 2>&1 \            
190         | sed -n '/<...> search starts here:/,    
191 $(shell $(1) -dM -E - </dev/null | grep '#defi    
192 endef                                             
193                                                   
194 CLANG_SYS_INCLUDES = $(call get_sys_includes,$    
195                                                   
196 EXTRA_BPF_HEADERS_SRC := $(addprefix $(src)/,$    
197                                                   
198 $(obj)/%.bpf.o: $(src)/%.bpf.c $(EXTRA_BPF_HEA    
199         @echo "  CLANG-BPF " $@                   
200         $(Q)$(CLANG) -g -O2 --target=bpf -D__T    
201                 -Wno-compare-distinct-pointer-    
202                 -I$(srctree)/samples/bpf -I$(s    
203                 -I$(LIBBPF_INCLUDE) $(CLANG_SY    
204                 -c $(filter %.bpf.c,$^) -o $@     
205                                                   
206 LINKED_SKELS := hid_mouse.skel.h hid_surface_d    
207 clean-files += $(LINKED_SKELS)                    
208                                                   
209 hid_mouse.skel.h-deps := hid_mouse.bpf.o          
210 hid_surface_dial.skel.h-deps := hid_surface_di    
211                                                   
212 LINKED_BPF_SRCS := $(patsubst %.bpf.o,%.bpf.c,    
213                                                   
214 BPF_SRCS_LINKED := $(notdir $(wildcard $(src)/    
215 BPF_OBJS_LINKED := $(patsubst %.bpf.c,$(obj)/%    
216 BPF_SKELS_LINKED := $(addprefix $(obj)/,$(LINK    
217                                                   
218 $(BPF_SKELS_LINKED): $(BPF_OBJS_LINKED) $(BPFT    
219         @echo "  BPF GEN-OBJ " $(@:.skel.h=)      
220         $(Q)$(BPFTOOL) gen object $(@:.skel.h=    
221         @echo "  BPF GEN-SKEL" $(@:.skel.h=)      
222         $(Q)$(BPFTOOL) gen skeleton $(@:.skel.    
223                                                   
224 # asm/sysreg.h - inline assembly used by it is    
225 # But, there is no easy way to fix it, so just    
226 # useless for BPF samples.                        
227 # below we use long chain of commands, clang |    
228 # to generate final object file. 'clang' compi    
229 # with native target, e.g., x64, arm64, etc. '    
230 # processing (llvm12) and IR optimizations. 'l    
231 # 'opt' output to IR, and finally 'llc' genera    
232 $(obj)/%.o: $(src)/%.c                            
233         @echo "  CLANG-bpf " $@                   
234         $(Q)$(CLANG) $(NOSTDINC_FLAGS) $(LINUX    
235                 -I$(obj) -I$(srctree)/tools/te    
236                 -I$(LIBBPF_INCLUDE) \             
237                 -D__KERNEL__ -D__BPF_TRACING__    
238                 -D__TARGET_ARCH_$(SRCARCH) -Wn    
239                 -Wno-gnu-variable-sized-type-n    
240                 -Wno-address-of-packed-member     
241                 -Wno-unknown-warning-option $(    
242                 -fno-asynchronous-unwind-table    
243                 -I$(srctree)/samples/hid/ \       
244                 -O2 -emit-llvm -Xclang -disabl    
245                 $(OPT) -O2 -mtriple=bpf-pc-lin    
246                 $(LLC) -march=bpf $(LLC_FLAGS)    
247 ifeq ($(DWARF2BTF),y)                             
248         $(BTF_PAHOLE) -J $@                       
249 endif                                             
                                                      

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