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