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 25 # Rust is also supported, but it may only be used in scenarios where a Rust
26 # toolchain is required to be available (e.g. 26 # toolchain is required to be available (e.g. when `CONFIG_RUST` is enabled).
27 # 27 #
28 # Sample syntax (see Documentation/kbuild/make 28 # Sample syntax (see Documentation/kbuild/makefiles.rst for reference)
29 # hostprogs := bin2hex 29 # hostprogs := bin2hex
30 # Will compile bin2hex.c and create an executa 30 # Will compile bin2hex.c and create an executable named bin2hex
31 # 31 #
32 # hostprogs := lxdialog 32 # hostprogs := lxdialog
33 # lxdialog-objs := checklist.o lxdialog.o 33 # lxdialog-objs := checklist.o lxdialog.o
34 # Will compile lxdialog.c and checklist.c, and 34 # Will compile lxdialog.c and checklist.c, and then link the executable
35 # lxdialog, based on checklist.o and lxdialog. 35 # lxdialog, based on checklist.o and lxdialog.o
36 # 36 #
37 # hostprogs := qconf 37 # hostprogs := qconf
38 # qconf-cxxobjs := qconf.o 38 # qconf-cxxobjs := qconf.o
39 # qconf-objs := menu.o 39 # qconf-objs := menu.o
40 # Will compile qconf as a C++ program, and men 40 # Will compile qconf as a C++ program, and menu as a C program.
41 # They are linked as C++ code to the executabl 41 # They are linked as C++ code to the executable qconf
42 # 42 #
43 # hostprogs := target 43 # hostprogs := target
44 # target-rust := y 44 # target-rust := y
45 # Will compile `target` as a Rust program, usi 45 # Will compile `target` as a Rust program, using `target.rs` as the crate root.
46 # The crate may consist of several source file 46 # The crate may consist of several source files.
47 47
48 # C code 48 # C code
49 # Executables compiled from a single .c file 49 # Executables compiled from a single .c file
50 host-csingle := $(foreach m,$(hostprogs), \ 50 host-csingle := $(foreach m,$(hostprogs), \
51 $(if $($(m)-objs)$($(m 51 $(if $($(m)-objs)$($(m)-cxxobjs)$($(m)-rust),,$(m)))
52 52
53 # C executables linked based on several .o fil 53 # C executables linked based on several .o files
54 host-cmulti := $(foreach m,$(hostprogs),\ 54 host-cmulti := $(foreach m,$(hostprogs),\
55 $(if $($(m)-cxxobjs)$($(m)- 55 $(if $($(m)-cxxobjs)$($(m)-rust),,$(if $($(m)-objs),$(m))))
56 56
57 # Object (.o) files compiled from .c files 57 # Object (.o) files compiled from .c files
58 host-cobjs := $(sort $(foreach m,$(hostpr 58 host-cobjs := $(sort $(foreach m,$(hostprogs),$($(m)-objs)))
59 59
60 # C++ code 60 # C++ code
61 # C++ executables compiled from at least one . 61 # C++ executables compiled from at least one .cc file
62 # and zero or more .c files 62 # and zero or more .c files
63 host-cxxmulti := $(foreach m,$(hostprogs),$( 63 host-cxxmulti := $(foreach m,$(hostprogs),$(if $($(m)-cxxobjs),$(m)))
64 64
65 # C++ Object (.o) files compiled from .cc file 65 # C++ Object (.o) files compiled from .cc files
66 host-cxxobjs := $(sort $(foreach m,$(host-c 66 host-cxxobjs := $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs)))
67 67
68 # Rust code 68 # Rust code
69 # Executables compiled from a single Rust crat 69 # Executables compiled from a single Rust crate (which may consist of
70 # one or more .rs files) 70 # one or more .rs files)
71 host-rust := $(foreach m,$(hostprogs),$( 71 host-rust := $(foreach m,$(hostprogs),$(if $($(m)-rust),$(m)))
72 72
73 host-csingle := $(addprefix $(obj)/,$(host- 73 host-csingle := $(addprefix $(obj)/,$(host-csingle))
74 host-cmulti := $(addprefix $(obj)/,$(host- 74 host-cmulti := $(addprefix $(obj)/,$(host-cmulti))
75 host-cobjs := $(addprefix $(obj)/,$(host- 75 host-cobjs := $(addprefix $(obj)/,$(host-cobjs))
76 host-cxxmulti := $(addprefix $(obj)/,$(host- 76 host-cxxmulti := $(addprefix $(obj)/,$(host-cxxmulti))
77 host-cxxobjs := $(addprefix $(obj)/,$(host- 77 host-cxxobjs := $(addprefix $(obj)/,$(host-cxxobjs))
78 host-rust := $(addprefix $(obj)/,$(host- 78 host-rust := $(addprefix $(obj)/,$(host-rust))
79 79
80 ##### 80 #####
81 # Handle options to gcc. Support building with 81 # Handle options to gcc. Support building with separate output directory
82 82
83 hostc_flags = -Wp,-MMD,$(depfile) \ !! 83 _hostc_flags = $(KBUILD_HOSTCFLAGS) $(HOST_EXTRACFLAGS) \
84 $(KBUILD_HOSTCFLAGS) $(HOST_E <<
85 $(HOSTCFLAGS_$(target-stem).o 84 $(HOSTCFLAGS_$(target-stem).o)
86 hostcxx_flags = -Wp,-MMD,$(depfile) \ !! 85 _hostcxx_flags = $(KBUILD_HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \
87 $(KBUILD_HOSTCXXFLAGS) $(HOST <<
88 $(HOSTCXXFLAGS_$(target-stem) 86 $(HOSTCXXFLAGS_$(target-stem).o)
89 !! 87 _hostrust_flags = $(KBUILD_HOSTRUSTFLAGS) $(HOST_EXTRARUSTFLAGS) \
90 # `--out-dir` is required to avoid temporaries !! 88 $(HOSTRUSTFLAGS_$(target-stem))
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 89
99 # $(objtree)/$(obj) for including generated he 90 # $(objtree)/$(obj) for including generated headers from checkin source files
100 ifeq ($(KBUILD_EXTMOD),) 91 ifeq ($(KBUILD_EXTMOD),)
101 ifdef building_out_of_srctree 92 ifdef building_out_of_srctree
102 hostc_flags += -I $(objtree)/$(obj) !! 93 _hostc_flags += -I $(objtree)/$(obj)
103 hostcxx_flags += -I $(objtree)/$(obj) !! 94 _hostcxx_flags += -I $(objtree)/$(obj)
104 endif 95 endif
105 endif 96 endif
106 97
>> 98 hostc_flags = -Wp,-MMD,$(depfile) $(_hostc_flags)
>> 99 hostcxx_flags = -Wp,-MMD,$(depfile) $(_hostcxx_flags)
>> 100 hostrust_flags = $(_hostrust_flags)
>> 101
107 ##### 102 #####
108 # Compile programs on the host 103 # Compile programs on the host
109 104
110 # Create executable from a single .c file 105 # Create executable from a single .c file
111 # host-csingle -> Executable 106 # host-csingle -> Executable
112 quiet_cmd_host-csingle = HOSTCC $@ 107 quiet_cmd_host-csingle = HOSTCC $@
113 cmd_host-csingle = $(HOSTCC) $(hostc_fl 108 cmd_host-csingle = $(HOSTCC) $(hostc_flags) $(KBUILD_HOSTLDFLAGS) -o $@ $< \
114 $(KBUILD_HOSTLDLIBS) $(HOSTLDL 109 $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
115 $(host-csingle): $(obj)/%: $(obj)/%.c FORCE !! 110 $(host-csingle): $(obj)/%: $(src)/%.c FORCE
116 $(call if_changed_dep,host-csingle) 111 $(call if_changed_dep,host-csingle)
117 112
118 # Link an executable based on list of .o files 113 # Link an executable based on list of .o files, all plain c
119 # host-cmulti -> executable 114 # host-cmulti -> executable
120 quiet_cmd_host-cmulti = HOSTLD $@ 115 quiet_cmd_host-cmulti = HOSTLD $@
121 cmd_host-cmulti = $(HOSTCC) $(KBUILD_H 116 cmd_host-cmulti = $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -o $@ \
122 $(addprefix $(obj)/, 117 $(addprefix $(obj)/, $($(target-stem)-objs)) \
123 $(KBUILD_HOSTLDLIBS) 118 $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
124 $(host-cmulti): FORCE 119 $(host-cmulti): FORCE
125 $(call if_changed,host-cmulti) 120 $(call if_changed,host-cmulti)
126 $(call multi_depend, $(host-cmulti), , -objs) 121 $(call multi_depend, $(host-cmulti), , -objs)
127 122
128 # Create .o file from a single .c file 123 # Create .o file from a single .c file
129 # host-cobjs -> .o 124 # host-cobjs -> .o
130 quiet_cmd_host-cobjs = HOSTCC $@ 125 quiet_cmd_host-cobjs = HOSTCC $@
131 cmd_host-cobjs = $(HOSTCC) $(hostc_fl 126 cmd_host-cobjs = $(HOSTCC) $(hostc_flags) -c -o $@ $<
132 $(host-cobjs): $(obj)/%.o: $(obj)/%.c FORCE !! 127 $(host-cobjs): $(obj)/%.o: $(src)/%.c FORCE
133 $(call if_changed_dep,host-cobjs) 128 $(call if_changed_dep,host-cobjs)
134 129
135 # Link an executable based on list of .o files 130 # Link an executable based on list of .o files, a mixture of .c and .cc
136 # host-cxxmulti -> executable 131 # host-cxxmulti -> executable
137 quiet_cmd_host-cxxmulti = HOSTLD $@ 132 quiet_cmd_host-cxxmulti = HOSTLD $@
138 cmd_host-cxxmulti = $(HOSTCXX) $(KBUILD_ 133 cmd_host-cxxmulti = $(HOSTCXX) $(KBUILD_HOSTLDFLAGS) -o $@ \
139 $(foreach o,objs cxx 134 $(foreach o,objs cxxobjs,\
140 $(addprefix $(obj)/, 135 $(addprefix $(obj)/, $($(target-stem)-$(o)))) \
141 $(KBUILD_HOSTLDLIBS) 136 $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
142 $(host-cxxmulti): FORCE 137 $(host-cxxmulti): FORCE
143 $(call if_changed,host-cxxmulti) 138 $(call if_changed,host-cxxmulti)
144 $(call multi_depend, $(host-cxxmulti), , -objs 139 $(call multi_depend, $(host-cxxmulti), , -objs -cxxobjs)
145 140
146 # Create .o file from a single .cc (C++) file 141 # Create .o file from a single .cc (C++) file
147 quiet_cmd_host-cxxobjs = HOSTCXX $@ 142 quiet_cmd_host-cxxobjs = HOSTCXX $@
148 cmd_host-cxxobjs = $(HOSTCXX) $(hostcxx 143 cmd_host-cxxobjs = $(HOSTCXX) $(hostcxx_flags) -c -o $@ $<
149 $(host-cxxobjs): $(obj)/%.o: $(obj)/%.cc FORCE !! 144 $(host-cxxobjs): $(obj)/%.o: $(src)/%.cc FORCE
150 $(call if_changed_dep,host-cxxobjs) 145 $(call if_changed_dep,host-cxxobjs)
151 146
152 # Create executable from a single Rust crate ( 147 # Create executable from a single Rust crate (which may consist of
153 # one or more `.rs` files) 148 # one or more `.rs` files)
154 # host-rust -> Executable 149 # host-rust -> Executable
155 quiet_cmd_host-rust = HOSTRUSTC $@ 150 quiet_cmd_host-rust = HOSTRUSTC $@
156 cmd_host-rust = \ 151 cmd_host-rust = \
157 $(HOSTRUSTC) $(hostrust_flags) --emit= !! 152 $(HOSTRUSTC) $(hostrust_flags) --emit=dep-info,link \
>> 153 --out-dir=$(obj)/ $<; \
>> 154 mv $(obj)/$(target-stem).d $(depfile); \
>> 155 sed -i '/^\#/d' $(depfile)
158 $(host-rust): $(obj)/%: $(src)/%.rs FORCE 156 $(host-rust): $(obj)/%: $(src)/%.rs FORCE
159 +$(call if_changed_dep,host-rust) !! 157 $(call if_changed_dep,host-rust)
160 158
161 targets += $(host-csingle) $(host-cmulti) $(ho 159 targets += $(host-csingle) $(host-cmulti) $(host-cobjs) \
162 $(host-cxxmulti) $(host-cxxobjs) $( 160 $(host-cxxmulti) $(host-cxxobjs) $(host-rust)
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