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