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,$(depfile) \ 83 hostc_flags = -Wp,-MMD,$(depfile) \
84 $(KBUILD_HOSTCFLAGS) $(HOST_E 84 $(KBUILD_HOSTCFLAGS) $(HOST_EXTRACFLAGS) \
85 $(HOSTCFLAGS_$(target-stem).o 85 $(HOSTCFLAGS_$(target-stem).o)
86 hostcxx_flags = -Wp,-MMD,$(depfile) \ 86 hostcxx_flags = -Wp,-MMD,$(depfile) \
87 $(KBUILD_HOSTCXXFLAGS) $(HOST 87 $(KBUILD_HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \
88 $(HOSTCXXFLAGS_$(target-stem) 88 $(HOSTCXXFLAGS_$(target-stem).o)
89 89
90 # `--out-dir` is required to avoid temporaries 90 # `--out-dir` is required to avoid temporaries being created by `rustc` in the
91 # current working directory, which may be not 91 # current working directory, which may be not accessible in the out-of-tree
92 # modules case. 92 # modules case.
93 hostrust_flags = --out-dir $(dir $@) --emit=de 93 hostrust_flags = --out-dir $(dir $@) --emit=dep-info=$(depfile) \
94 -Clinker-flavor=gcc -Clinker= 94 -Clinker-flavor=gcc -Clinker=$(HOSTCC) \
95 -Clink-args='$(call escsq,$(K 95 -Clink-args='$(call escsq,$(KBUILD_HOSTLDFLAGS))' \
96 $(KBUILD_HOSTRUSTFLAGS) $(HOS 96 $(KBUILD_HOSTRUSTFLAGS) $(HOST_EXTRARUSTFLAGS) \
97 $(HOSTRUSTFLAGS_$(target-stem 97 $(HOSTRUSTFLAGS_$(target-stem))
98 98
99 # $(objtree)/$(obj) for including generated he 99 # $(objtree)/$(obj) for including generated headers from checkin source files
100 ifeq ($(KBUILD_EXTMOD),) 100 ifeq ($(KBUILD_EXTMOD),)
101 ifdef building_out_of_srctree 101 ifdef building_out_of_srctree
102 hostc_flags += -I $(objtree)/$(obj) 102 hostc_flags += -I $(objtree)/$(obj)
103 hostcxx_flags += -I $(objtree)/$(obj) 103 hostcxx_flags += -I $(objtree)/$(obj)
104 endif 104 endif
105 endif 105 endif
106 106
107 ##### 107 #####
108 # Compile programs on the host 108 # Compile programs on the host
109 109
110 # Create executable from a single .c file 110 # Create executable from a single .c file
111 # host-csingle -> Executable 111 # host-csingle -> Executable
112 quiet_cmd_host-csingle = HOSTCC $@ 112 quiet_cmd_host-csingle = HOSTCC $@
113 cmd_host-csingle = $(HOSTCC) $(hostc_fl 113 cmd_host-csingle = $(HOSTCC) $(hostc_flags) $(KBUILD_HOSTLDFLAGS) -o $@ $< \
114 $(KBUILD_HOSTLDLIBS) $(HOSTLDL 114 $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
115 $(host-csingle): $(obj)/%: $(obj)/%.c FORCE 115 $(host-csingle): $(obj)/%: $(obj)/%.c FORCE
116 $(call if_changed_dep,host-csingle) 116 $(call if_changed_dep,host-csingle)
117 117
118 # Link an executable based on list of .o files 118 # Link an executable based on list of .o files, all plain c
119 # host-cmulti -> executable 119 # host-cmulti -> executable
120 quiet_cmd_host-cmulti = HOSTLD $@ 120 quiet_cmd_host-cmulti = HOSTLD $@
121 cmd_host-cmulti = $(HOSTCC) $(KBUILD_H 121 cmd_host-cmulti = $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -o $@ \
122 $(addprefix $(obj)/, 122 $(addprefix $(obj)/, $($(target-stem)-objs)) \
123 $(KBUILD_HOSTLDLIBS) 123 $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
124 $(host-cmulti): FORCE 124 $(host-cmulti): FORCE
125 $(call if_changed,host-cmulti) 125 $(call if_changed,host-cmulti)
126 $(call multi_depend, $(host-cmulti), , -objs) 126 $(call multi_depend, $(host-cmulti), , -objs)
127 127
128 # Create .o file from a single .c file 128 # Create .o file from a single .c file
129 # host-cobjs -> .o 129 # host-cobjs -> .o
130 quiet_cmd_host-cobjs = HOSTCC $@ 130 quiet_cmd_host-cobjs = HOSTCC $@
131 cmd_host-cobjs = $(HOSTCC) $(hostc_fl 131 cmd_host-cobjs = $(HOSTCC) $(hostc_flags) -c -o $@ $<
132 $(host-cobjs): $(obj)/%.o: $(obj)/%.c FORCE 132 $(host-cobjs): $(obj)/%.o: $(obj)/%.c FORCE
133 $(call if_changed_dep,host-cobjs) 133 $(call if_changed_dep,host-cobjs)
134 134
135 # Link an executable based on list of .o files 135 # Link an executable based on list of .o files, a mixture of .c and .cc
136 # host-cxxmulti -> executable 136 # host-cxxmulti -> executable
137 quiet_cmd_host-cxxmulti = HOSTLD $@ 137 quiet_cmd_host-cxxmulti = HOSTLD $@
138 cmd_host-cxxmulti = $(HOSTCXX) $(KBUILD_ 138 cmd_host-cxxmulti = $(HOSTCXX) $(KBUILD_HOSTLDFLAGS) -o $@ \
139 $(foreach o,objs cxx 139 $(foreach o,objs cxxobjs,\
140 $(addprefix $(obj)/, 140 $(addprefix $(obj)/, $($(target-stem)-$(o)))) \
141 $(KBUILD_HOSTLDLIBS) 141 $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
142 $(host-cxxmulti): FORCE 142 $(host-cxxmulti): FORCE
143 $(call if_changed,host-cxxmulti) 143 $(call if_changed,host-cxxmulti)
144 $(call multi_depend, $(host-cxxmulti), , -objs 144 $(call multi_depend, $(host-cxxmulti), , -objs -cxxobjs)
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: $(obj)/%.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 # Create executable from a single Rust crate (which may consist of
153 # one or more `.rs` files) 153 # one or more `.rs` files)
154 # host-rust -> Executable 154 # host-rust -> Executable
155 quiet_cmd_host-rust = HOSTRUSTC $@ 155 quiet_cmd_host-rust = HOSTRUSTC $@
156 cmd_host-rust = \ 156 cmd_host-rust = \
157 $(HOSTRUSTC) $(hostrust_flags) --emit= 157 $(HOSTRUSTC) $(hostrust_flags) --emit=link=$@ $<
158 $(host-rust): $(obj)/%: $(src)/%.rs FORCE 158 $(host-rust): $(obj)/%: $(src)/%.rs FORCE
159 +$(call if_changed_dep,host-rust) 159 +$(call if_changed_dep,host-rust)
160 160
161 targets += $(host-csingle) $(host-cmulti) $(ho 161 targets += $(host-csingle) $(host-cmulti) $(host-cobjs) \
162 $(host-cxxmulti) $(host-cxxobjs) $( 162 $(host-cxxmulti) $(host-cxxobjs) $(host-rust)
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