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