1 # SPDX-License-Identifier: GPL-2.0 <<
2 <<
3 # LEX <<
4 # -------------------------------------------- <<
5 quiet_cmd_flex = LEX $@ <<
6 cmd_flex = $(LEX) -o$@ -L $< <<
7 <<
8 $(obj)/%.lex.c: $(src)/%.l FORCE <<
9 $(call if_changed,flex) <<
10 <<
11 # YACC <<
12 # -------------------------------------------- <<
13 quiet_cmd_bison = YACC $(basename $@).[ch] <<
14 cmd_bison = $(YACC) -o $(basename $@).c <<
15 <<
16 $(obj)/%.tab.c $(obj)/%.tab.h: $(src)/%.y FORC <<
17 $(call if_changed,bison) <<
18 <<
19 # ============================================ 1 # ==========================================================================
20 # Building binaries on the host system 2 # Building binaries on the host system
21 # Binaries are used during the compilation of 3 # Binaries are used during the compilation of the kernel, for example
22 # to preprocess a data file. 4 # to preprocess a data file.
23 # 5 #
24 # Both C and C++ are supported, but preferred 6 # Both C and C++ are supported, but preferred language is C for such utilities.
25 # Rust is also supported, but it may only be u <<
26 # toolchain is required to be available (e.g. <<
27 # 7 #
28 # Sample syntax (see Documentation/kbuild/make !! 8 # Sample syntax (see Documentation/kbuild/makefiles.txt for reference)
29 # hostprogs := bin2hex !! 9 # hostprogs-y := bin2hex
30 # Will compile bin2hex.c and create an executa 10 # Will compile bin2hex.c and create an executable named bin2hex
31 # 11 #
32 # hostprogs := lxdialog !! 12 # hostprogs-y := lxdialog
33 # lxdialog-objs := checklist.o lxdialog.o 13 # lxdialog-objs := checklist.o lxdialog.o
34 # Will compile lxdialog.c and checklist.c, and 14 # Will compile lxdialog.c and checklist.c, and then link the executable
35 # lxdialog, based on checklist.o and lxdialog. 15 # lxdialog, based on checklist.o and lxdialog.o
36 # 16 #
37 # hostprogs := qconf !! 17 # hostprogs-y := qconf
38 # qconf-cxxobjs := qconf.o 18 # qconf-cxxobjs := qconf.o
39 # qconf-objs := menu.o 19 # qconf-objs := menu.o
40 # Will compile qconf as a C++ program, and men 20 # Will compile qconf as a C++ program, and menu as a C program.
41 # They are linked as C++ code to the executabl 21 # They are linked as C++ code to the executable qconf
42 # !! 22
43 # hostprogs := target !! 23 # hostprogs-y := conf
44 # target-rust := y !! 24 # conf-objs := conf.o libkconfig.so
45 # Will compile `target` as a Rust program, usi !! 25 # libkconfig-objs := expr.o type.o
46 # The crate may consist of several source file !! 26 # Will create a shared library named libkconfig.so that consists of
>> 27 # expr.o and type.o (they are both compiled as C code and the object files
>> 28 # are made as position independent code).
>> 29 # conf.c is compiled as a C program, and conf.o is linked together with
>> 30 # libkconfig.so as the executable conf.
>> 31 # Note: Shared libraries consisting of C++ files are not supported
>> 32
>> 33 __hostprogs := $(sort $(hostprogs-y) $(hostprogs-m))
47 34
48 # C code 35 # C code
49 # Executables compiled from a single .c file 36 # Executables compiled from a single .c file
50 host-csingle := $(foreach m,$(hostprogs), \ !! 37 host-csingle := $(foreach m,$(__hostprogs),$(if $($(m)-objs),,$(m)))
51 $(if $($(m)-objs)$($(m <<
52 38
53 # C executables linked based on several .o fil 39 # C executables linked based on several .o files
54 host-cmulti := $(foreach m,$(hostprogs),\ !! 40 host-cmulti := $(foreach m,$(__hostprogs),\
55 $(if $($(m)-cxxobjs)$($(m)- !! 41 $(if $($(m)-cxxobjs),,$(if $($(m)-objs),$(m))))
56 42
57 # Object (.o) files compiled from .c files 43 # Object (.o) files compiled from .c files
58 host-cobjs := $(sort $(foreach m,$(hostpr !! 44 host-cobjs := $(sort $(foreach m,$(__hostprogs),$($(m)-objs)))
59 45
60 # C++ code 46 # C++ code
61 # C++ executables compiled from at least one . !! 47 # C++ executables compiled from at least on .cc file
62 # and zero or more .c files 48 # and zero or more .c files
63 host-cxxmulti := $(foreach m,$(hostprogs),$( !! 49 host-cxxmulti := $(foreach m,$(__hostprogs),$(if $($(m)-cxxobjs),$(m)))
64 50
65 # C++ Object (.o) files compiled from .cc file 51 # C++ Object (.o) files compiled from .cc files
66 host-cxxobjs := $(sort $(foreach m,$(host-c 52 host-cxxobjs := $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs)))
67 53
68 # Rust code !! 54 # Shared libaries (only .c supported)
69 # Executables compiled from a single Rust crat !! 55 # Shared libraries (.so) - all .so files referenced in "xxx-objs"
70 # one or more .rs files) !! 56 host-cshlib := $(sort $(filter %.so, $(host-cobjs)))
71 host-rust := $(foreach m,$(hostprogs),$( !! 57 # Remove .so files from "xxx-objs"
>> 58 host-cobjs := $(filter-out %.so,$(host-cobjs))
>> 59
>> 60 #Object (.o) files used by the shared libaries
>> 61 host-cshobjs := $(sort $(foreach m,$(host-cshlib),$($(m:.so=-objs))))
>> 62
>> 63 # output directory for programs/.o files
>> 64 # hostprogs-y := tools/build may have been specified. Retrieve directory
>> 65 host-objdirs := $(foreach f,$(__hostprogs), $(if $(dir $(f)),$(dir $(f))))
>> 66 # directory of .o files from prog-objs notation
>> 67 host-objdirs += $(foreach f,$(host-cmulti), \
>> 68 $(foreach m,$($(f)-objs), \
>> 69 $(if $(dir $(m)),$(dir $(m)))))
>> 70 # directory of .o files from prog-cxxobjs notation
>> 71 host-objdirs += $(foreach f,$(host-cxxmulti), \
>> 72 $(foreach m,$($(f)-cxxobjs), \
>> 73 $(if $(dir $(m)),$(dir $(m)))))
72 74
>> 75 host-objdirs := $(strip $(sort $(filter-out ./,$(host-objdirs))))
>> 76
>> 77
>> 78 __hostprogs := $(addprefix $(obj)/,$(__hostprogs))
73 host-csingle := $(addprefix $(obj)/,$(host- 79 host-csingle := $(addprefix $(obj)/,$(host-csingle))
74 host-cmulti := $(addprefix $(obj)/,$(host- 80 host-cmulti := $(addprefix $(obj)/,$(host-cmulti))
75 host-cobjs := $(addprefix $(obj)/,$(host- 81 host-cobjs := $(addprefix $(obj)/,$(host-cobjs))
76 host-cxxmulti := $(addprefix $(obj)/,$(host- 82 host-cxxmulti := $(addprefix $(obj)/,$(host-cxxmulti))
77 host-cxxobjs := $(addprefix $(obj)/,$(host- 83 host-cxxobjs := $(addprefix $(obj)/,$(host-cxxobjs))
78 host-rust := $(addprefix $(obj)/,$(host- !! 84 host-cshlib := $(addprefix $(obj)/,$(host-cshlib))
>> 85 host-cshobjs := $(addprefix $(obj)/,$(host-cshobjs))
>> 86 host-objdirs := $(addprefix $(obj)/,$(host-objdirs))
>> 87
>> 88 obj-dirs += $(host-objdirs)
79 89
80 ##### 90 #####
81 # Handle options to gcc. Support building with 91 # Handle options to gcc. Support building with separate output directory
82 92
83 hostc_flags = -Wp,-MMD,$(depfile) \ !! 93 _hostc_flags = $(HOSTCFLAGS) $(HOST_EXTRACFLAGS) \
84 $(KBUILD_HOSTCFLAGS) $(HOST_E !! 94 $(HOSTCFLAGS_$(basetarget).o)
85 $(HOSTCFLAGS_$(target-stem).o !! 95 _hostcxx_flags = $(HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \
86 hostcxx_flags = -Wp,-MMD,$(depfile) \ !! 96 $(HOSTCXXFLAGS_$(basetarget).o)
87 $(KBUILD_HOSTCXXFLAGS) $(HOST !! 97
88 $(HOSTCXXFLAGS_$(target-stem) !! 98 ifeq ($(KBUILD_SRC),)
89 !! 99 __hostc_flags = $(_hostc_flags)
90 # `--out-dir` is required to avoid temporaries !! 100 __hostcxx_flags = $(_hostcxx_flags)
91 # current working directory, which may be not !! 101 else
92 # modules case. !! 102 __hostc_flags = -I$(obj) $(call flags,_hostc_flags)
93 hostrust_flags = --out-dir $(dir $@) --emit=de !! 103 __hostcxx_flags = -I$(obj) $(call flags,_hostcxx_flags)
94 -Clinker-flavor=gcc -Clinker= <<
95 -Clink-args='$(call escsq,$(K <<
96 $(KBUILD_HOSTRUSTFLAGS) $(HOS <<
97 $(HOSTRUSTFLAGS_$(target-stem <<
98 <<
99 # $(objtree)/$(obj) for including generated he <<
100 ifeq ($(KBUILD_EXTMOD),) <<
101 ifdef building_out_of_srctree <<
102 hostc_flags += -I $(objtree)/$(obj) <<
103 hostcxx_flags += -I $(objtree)/$(obj) <<
104 endif <<
105 endif 104 endif
106 105
>> 106 hostc_flags = -Wp,-MD,$(depfile) $(__hostc_flags)
>> 107 hostcxx_flags = -Wp,-MD,$(depfile) $(__hostcxx_flags)
>> 108
107 ##### 109 #####
108 # Compile programs on the host 110 # Compile programs on the host
109 111
110 # Create executable from a single .c file 112 # Create executable from a single .c file
111 # host-csingle -> Executable 113 # host-csingle -> Executable
112 quiet_cmd_host-csingle = HOSTCC $@ 114 quiet_cmd_host-csingle = HOSTCC $@
113 cmd_host-csingle = $(HOSTCC) $(hostc_fl !! 115 cmd_host-csingle = $(HOSTCC) $(hostc_flags) -o $@ $< \
114 $(KBUILD_HOSTLDLIBS) $(HOSTLDL !! 116 $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
115 $(host-csingle): $(obj)/%: $(obj)/%.c FORCE !! 117 $(host-csingle): $(obj)/%: $(src)/%.c FORCE
116 $(call if_changed_dep,host-csingle) 118 $(call if_changed_dep,host-csingle)
117 119
118 # Link an executable based on list of .o files 120 # Link an executable based on list of .o files, all plain c
119 # host-cmulti -> executable 121 # host-cmulti -> executable
120 quiet_cmd_host-cmulti = HOSTLD $@ 122 quiet_cmd_host-cmulti = HOSTLD $@
121 cmd_host-cmulti = $(HOSTCC) $(KBUILD_H !! 123 cmd_host-cmulti = $(HOSTCC) $(HOSTLDFLAGS) -o $@ \
122 $(addprefix $(obj)/, !! 124 $(addprefix $(obj)/,$($(@F)-objs)) \
123 $(KBUILD_HOSTLDLIBS) !! 125 $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
124 $(host-cmulti): FORCE !! 126 $(host-cmulti): $(obj)/%: $(host-cobjs) $(host-cshlib) FORCE
125 $(call if_changed,host-cmulti) 127 $(call if_changed,host-cmulti)
126 $(call multi_depend, $(host-cmulti), , -objs) <<
127 128
128 # Create .o file from a single .c file 129 # Create .o file from a single .c file
129 # host-cobjs -> .o 130 # host-cobjs -> .o
130 quiet_cmd_host-cobjs = HOSTCC $@ 131 quiet_cmd_host-cobjs = HOSTCC $@
131 cmd_host-cobjs = $(HOSTCC) $(hostc_fl 132 cmd_host-cobjs = $(HOSTCC) $(hostc_flags) -c -o $@ $<
132 $(host-cobjs): $(obj)/%.o: $(obj)/%.c FORCE !! 133 $(host-cobjs): $(obj)/%.o: $(src)/%.c FORCE
133 $(call if_changed_dep,host-cobjs) 134 $(call if_changed_dep,host-cobjs)
134 135
135 # Link an executable based on list of .o files 136 # Link an executable based on list of .o files, a mixture of .c and .cc
136 # host-cxxmulti -> executable 137 # host-cxxmulti -> executable
137 quiet_cmd_host-cxxmulti = HOSTLD $@ 138 quiet_cmd_host-cxxmulti = HOSTLD $@
138 cmd_host-cxxmulti = $(HOSTCXX) $(KBUILD_ !! 139 cmd_host-cxxmulti = $(HOSTCXX) $(HOSTLDFLAGS) -o $@ \
139 $(foreach o,objs cxx 140 $(foreach o,objs cxxobjs,\
140 $(addprefix $(obj)/, !! 141 $(addprefix $(obj)/,$($(@F)-$(o)))) \
141 $(KBUILD_HOSTLDLIBS) !! 142 $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
142 $(host-cxxmulti): FORCE !! 143 $(host-cxxmulti): $(obj)/%: $(host-cobjs) $(host-cxxobjs) $(host-cshlib) FORCE
143 $(call if_changed,host-cxxmulti) 144 $(call if_changed,host-cxxmulti)
144 $(call multi_depend, $(host-cxxmulti), , -objs <<
145 145
146 # Create .o file from a single .cc (C++) file 146 # Create .o file from a single .cc (C++) file
147 quiet_cmd_host-cxxobjs = HOSTCXX $@ 147 quiet_cmd_host-cxxobjs = HOSTCXX $@
148 cmd_host-cxxobjs = $(HOSTCXX) $(hostcxx 148 cmd_host-cxxobjs = $(HOSTCXX) $(hostcxx_flags) -c -o $@ $<
149 $(host-cxxobjs): $(obj)/%.o: $(obj)/%.cc FORCE !! 149 $(host-cxxobjs): $(obj)/%.o: $(src)/%.cc FORCE
150 $(call if_changed_dep,host-cxxobjs) 150 $(call if_changed_dep,host-cxxobjs)
151 151
152 # Create executable from a single Rust crate ( !! 152 # Compile .c file, create position independent .o file
153 # one or more `.rs` files) !! 153 # host-cshobjs -> .o
154 # host-rust -> Executable !! 154 quiet_cmd_host-cshobjs = HOSTCC -fPIC $@
155 quiet_cmd_host-rust = HOSTRUSTC $@ !! 155 cmd_host-cshobjs = $(HOSTCC) $(hostc_flags) -fPIC -c -o $@ $<
156 cmd_host-rust = \ !! 156 $(host-cshobjs): $(obj)/%.o: $(src)/%.c FORCE
157 $(HOSTRUSTC) $(hostrust_flags) --emit= !! 157 $(call if_changed_dep,host-cshobjs)
158 $(host-rust): $(obj)/%: $(src)/%.rs FORCE !! 158
159 +$(call if_changed_dep,host-rust) !! 159 # Link a shared library, based on position independent .o files
>> 160 # *.o -> .so shared library (host-cshlib)
>> 161 quiet_cmd_host-cshlib = HOSTLLD -shared $@
>> 162 cmd_host-cshlib = $(HOSTCC) $(HOSTLDFLAGS) -shared -o $@ \
>> 163 $(addprefix $(obj)/,$($(@F:.so=-objs))) \
>> 164 $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
>> 165 $(host-cshlib): $(obj)/%: $(host-cshobjs) FORCE
>> 166 $(call if_changed,host-cshlib)
>> 167
>> 168 targets += $(host-csingle) $(host-cmulti) $(host-cobjs)\
>> 169 $(host-cxxmulti) $(host-cxxobjs) $(host-cshlib) $(host-cshobjs)
160 170
161 targets += $(host-csingle) $(host-cmulti) $(ho <<
162 $(host-cxxmulti) $(host-cxxobjs) $( <<
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