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 # !! 40
43 # hostprogs := target !! 41 __hostprogs := $(sort $(hostprogs))
44 # target-rust := y !! 42 host-cxxshlib := $(sort $(hostcxxlibs-y) $(hostcxxlibs-m))
45 # Will compile `target` as a Rust program, usi <<
46 # The crate may consist of several source file <<
47 43
48 # C code 44 # C code
49 # Executables compiled from a single .c file 45 # Executables compiled from a single .c file
50 host-csingle := $(foreach m,$(hostprogs), \ !! 46 host-csingle := $(foreach m,$(__hostprogs), \
51 $(if $($(m)-objs)$($(m !! 47 $(if $($(m)-objs)$($(m)-cxxobjs),,$(m)))
52 48
53 # C executables linked based on several .o fil 49 # C executables linked based on several .o files
54 host-cmulti := $(foreach m,$(hostprogs),\ !! 50 host-cmulti := $(foreach m,$(__hostprogs),\
55 $(if $($(m)-cxxobjs)$($(m)- !! 51 $(if $($(m)-cxxobjs),,$(if $($(m)-objs),$(m))))
56 52
57 # Object (.o) files compiled from .c files 53 # Object (.o) files compiled from .c files
58 host-cobjs := $(sort $(foreach m,$(hostpr !! 54 host-cobjs := $(sort $(foreach m,$(__hostprogs),$($(m)-objs)))
59 55
60 # C++ code 56 # C++ code
61 # C++ executables compiled from at least one . 57 # C++ executables compiled from at least one .cc file
62 # and zero or more .c files 58 # and zero or more .c files
63 host-cxxmulti := $(foreach m,$(hostprogs),$( !! 59 host-cxxmulti := $(foreach m,$(__hostprogs),$(if $($(m)-cxxobjs),$(m)))
64 60
65 # C++ Object (.o) files compiled from .cc file 61 # C++ Object (.o) files compiled from .cc files
66 host-cxxobjs := $(sort $(foreach m,$(host-c 62 host-cxxobjs := $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs)))
67 63
68 # Rust code !! 64 # Object (.o) files used by the shared libaries
69 # Executables compiled from a single Rust crat !! 65 host-cxxshobjs := $(sort $(foreach m,$(host-cxxshlib),$($(m:.so=-objs))))
70 # one or more .rs files) <<
71 host-rust := $(foreach m,$(hostprogs),$( <<
72 66
73 host-csingle := $(addprefix $(obj)/,$(host- 67 host-csingle := $(addprefix $(obj)/,$(host-csingle))
74 host-cmulti := $(addprefix $(obj)/,$(host- 68 host-cmulti := $(addprefix $(obj)/,$(host-cmulti))
75 host-cobjs := $(addprefix $(obj)/,$(host- 69 host-cobjs := $(addprefix $(obj)/,$(host-cobjs))
76 host-cxxmulti := $(addprefix $(obj)/,$(host- 70 host-cxxmulti := $(addprefix $(obj)/,$(host-cxxmulti))
77 host-cxxobjs := $(addprefix $(obj)/,$(host- 71 host-cxxobjs := $(addprefix $(obj)/,$(host-cxxobjs))
78 host-rust := $(addprefix $(obj)/,$(host- !! 72 host-cxxshlib := $(addprefix $(obj)/,$(host-cxxshlib))
>> 73 host-cxxshobjs := $(addprefix $(obj)/,$(host-cxxshobjs))
79 74
80 ##### 75 #####
81 # Handle options to gcc. Support building with 76 # Handle options to gcc. Support building with separate output directory
82 77
83 hostc_flags = -Wp,-MMD,$(depfile) \ !! 78 _hostc_flags = $(KBUILD_HOSTCFLAGS) $(HOST_EXTRACFLAGS) \
84 $(KBUILD_HOSTCFLAGS) $(HOST_E <<
85 $(HOSTCFLAGS_$(target-stem).o 79 $(HOSTCFLAGS_$(target-stem).o)
86 hostcxx_flags = -Wp,-MMD,$(depfile) \ !! 80 _hostcxx_flags = $(KBUILD_HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \
87 $(KBUILD_HOSTCXXFLAGS) $(HOST <<
88 $(HOSTCXXFLAGS_$(target-stem) 81 $(HOSTCXXFLAGS_$(target-stem).o)
89 82
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 83 # $(objtree)/$(obj) for including generated headers from checkin source files
100 ifeq ($(KBUILD_EXTMOD),) 84 ifeq ($(KBUILD_EXTMOD),)
101 ifdef building_out_of_srctree 85 ifdef building_out_of_srctree
102 hostc_flags += -I $(objtree)/$(obj) !! 86 _hostc_flags += -I $(objtree)/$(obj)
103 hostcxx_flags += -I $(objtree)/$(obj) !! 87 _hostcxx_flags += -I $(objtree)/$(obj)
104 endif 88 endif
105 endif 89 endif
106 90
>> 91 hostc_flags = -Wp,-MD,$(depfile) $(_hostc_flags)
>> 92 hostcxx_flags = -Wp,-MD,$(depfile) $(_hostcxx_flags)
>> 93
107 ##### 94 #####
108 # Compile programs on the host 95 # Compile programs on the host
109 96
110 # Create executable from a single .c file 97 # Create executable from a single .c file
111 # host-csingle -> Executable 98 # host-csingle -> Executable
112 quiet_cmd_host-csingle = HOSTCC $@ 99 quiet_cmd_host-csingle = HOSTCC $@
113 cmd_host-csingle = $(HOSTCC) $(hostc_fl 100 cmd_host-csingle = $(HOSTCC) $(hostc_flags) $(KBUILD_HOSTLDFLAGS) -o $@ $< \
114 $(KBUILD_HOSTLDLIBS) $(HOSTLDL 101 $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
115 $(host-csingle): $(obj)/%: $(obj)/%.c FORCE !! 102 $(host-csingle): $(obj)/%: $(src)/%.c FORCE
116 $(call if_changed_dep,host-csingle) 103 $(call if_changed_dep,host-csingle)
117 104
118 # Link an executable based on list of .o files 105 # Link an executable based on list of .o files, all plain c
119 # host-cmulti -> executable 106 # host-cmulti -> executable
120 quiet_cmd_host-cmulti = HOSTLD $@ 107 quiet_cmd_host-cmulti = HOSTLD $@
121 cmd_host-cmulti = $(HOSTCC) $(KBUILD_H 108 cmd_host-cmulti = $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -o $@ \
122 $(addprefix $(obj)/, 109 $(addprefix $(obj)/, $($(target-stem)-objs)) \
123 $(KBUILD_HOSTLDLIBS) 110 $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
124 $(host-cmulti): FORCE 111 $(host-cmulti): FORCE
125 $(call if_changed,host-cmulti) 112 $(call if_changed,host-cmulti)
126 $(call multi_depend, $(host-cmulti), , -objs) 113 $(call multi_depend, $(host-cmulti), , -objs)
127 114
128 # Create .o file from a single .c file 115 # Create .o file from a single .c file
129 # host-cobjs -> .o 116 # host-cobjs -> .o
130 quiet_cmd_host-cobjs = HOSTCC $@ 117 quiet_cmd_host-cobjs = HOSTCC $@
131 cmd_host-cobjs = $(HOSTCC) $(hostc_fl 118 cmd_host-cobjs = $(HOSTCC) $(hostc_flags) -c -o $@ $<
132 $(host-cobjs): $(obj)/%.o: $(obj)/%.c FORCE !! 119 $(host-cobjs): $(obj)/%.o: $(src)/%.c FORCE
133 $(call if_changed_dep,host-cobjs) 120 $(call if_changed_dep,host-cobjs)
134 121
135 # Link an executable based on list of .o files 122 # Link an executable based on list of .o files, a mixture of .c and .cc
136 # host-cxxmulti -> executable 123 # host-cxxmulti -> executable
137 quiet_cmd_host-cxxmulti = HOSTLD $@ 124 quiet_cmd_host-cxxmulti = HOSTLD $@
138 cmd_host-cxxmulti = $(HOSTCXX) $(KBUILD_ 125 cmd_host-cxxmulti = $(HOSTCXX) $(KBUILD_HOSTLDFLAGS) -o $@ \
139 $(foreach o,objs cxx 126 $(foreach o,objs cxxobjs,\
140 $(addprefix $(obj)/, 127 $(addprefix $(obj)/, $($(target-stem)-$(o)))) \
141 $(KBUILD_HOSTLDLIBS) 128 $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
142 $(host-cxxmulti): FORCE 129 $(host-cxxmulti): FORCE
143 $(call if_changed,host-cxxmulti) 130 $(call if_changed,host-cxxmulti)
144 $(call multi_depend, $(host-cxxmulti), , -objs 131 $(call multi_depend, $(host-cxxmulti), , -objs -cxxobjs)
145 132
146 # Create .o file from a single .cc (C++) file 133 # Create .o file from a single .cc (C++) file
147 quiet_cmd_host-cxxobjs = HOSTCXX $@ 134 quiet_cmd_host-cxxobjs = HOSTCXX $@
148 cmd_host-cxxobjs = $(HOSTCXX) $(hostcxx 135 cmd_host-cxxobjs = $(HOSTCXX) $(hostcxx_flags) -c -o $@ $<
149 $(host-cxxobjs): $(obj)/%.o: $(obj)/%.cc FORCE !! 136 $(host-cxxobjs): $(obj)/%.o: $(src)/%.cc FORCE
150 $(call if_changed_dep,host-cxxobjs) 137 $(call if_changed_dep,host-cxxobjs)
151 138
152 # Create executable from a single Rust crate ( !! 139 # Compile .c file, create position independent .o file
153 # one or more `.rs` files) !! 140 # Note that plugin capable gcc versions can be either C or C++ based
154 # host-rust -> Executable !! 141 # therefore plugin source files have to be compilable in both C and C++ mode.
155 quiet_cmd_host-rust = HOSTRUSTC $@ !! 142 # This is why a C++ compiler is invoked on a .c file.
156 cmd_host-rust = \ !! 143 # host-cxxshobjs -> .o
157 $(HOSTRUSTC) $(hostrust_flags) --emit= !! 144 quiet_cmd_host-cxxshobjs = HOSTCXX -fPIC $@
158 $(host-rust): $(obj)/%: $(src)/%.rs FORCE !! 145 cmd_host-cxxshobjs = $(HOSTCXX) $(hostcxx_flags) -fPIC -c -o $@ $<
159 +$(call if_changed_dep,host-rust) !! 146 $(host-cxxshobjs): $(obj)/%.o: $(src)/%.c FORCE
>> 147 $(call if_changed_dep,host-cxxshobjs)
>> 148
>> 149 # Link a shared library, based on position independent .o files
>> 150 # *.o -> .so shared library (host-cxxshlib)
>> 151 quiet_cmd_host-cxxshlib = HOSTLLD -shared $@
>> 152 cmd_host-cxxshlib = $(HOSTCXX) $(KBUILD_HOSTLDFLAGS) -shared -o $@ \
>> 153 $(addprefix $(obj)/, $($(target-stem)-objs)) \
>> 154 $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem).so)
>> 155 $(host-cxxshlib): FORCE
>> 156 $(call if_changed,host-cxxshlib)
>> 157 $(call multi_depend, $(host-cxxshlib), .so, -objs)
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-cxxshlib) $(host-cxxshobjs)
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