summaryrefslogtreecommitdiffstats
path: root/scripts/Makefile.host
blob: 7aea9005e497001cbf7c61d1085b3b05b11deb7d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
# SPDX-License-Identifier: GPL-2.0

# LEX
# ---------------------------------------------------------------------------
quiet_cmd_flex = LEX     $@
      cmd_flex = $(LEX) -o$@ -L $<

$(obj)/%.lex.c: $(src)/%.l FORCE
	$(call if_changed,flex)

# YACC
# ---------------------------------------------------------------------------
quiet_cmd_bison = YACC    $(basename $@).[ch]
      cmd_bison = $(YACC) -o $(basename $@).c --defines=$(basename $@).h -t -l $<

$(obj)/%.tab.c $(obj)/%.tab.h: $(src)/%.y FORCE
	$(call if_changed,bison)

# ==========================================================================
# Building binaries on the host system
# Binaries are used during the compilation of the kernel, for example
# to preprocess a data file.
#
# Both C and C++ are supported, but preferred language is C for such utilities.
# Rust is also supported, but it may only be used in scenarios where a Rust
# toolchain is required to be available (e.g. when  `CONFIG_RUST` is enabled).
#
# Sample syntax (see Documentation/kbuild/makefiles.rst for reference)
# hostprogs := bin2hex
# Will compile bin2hex.c and create an executable named bin2hex
#
# hostprogs     := lxdialog
# lxdialog-objs := checklist.o lxdialog.o
# Will compile lxdialog.c and checklist.c, and then link the executable
# lxdialog, based on checklist.o and lxdialog.o
#
# hostprogs       := qconf
# qconf-cxxobjs   := qconf.o
# qconf-objs      := menu.o
# Will compile qconf as a C++ program, and menu as a C program.
# They are linked as C++ code to the executable qconf
#
# hostprogs   := target
# target-rust := y
# Will compile `target` as a Rust program, using `target.rs` as the crate root.
# The crate may consist of several source files.

# C code
# Executables compiled from a single .c file
host-csingle	:= $(foreach m,$(hostprogs), \
			$(if $($(m)-objs)$($(m)-cxxobjs)$($(m)-rust),,$(m)))

# C executables linked based on several .o files
host-cmulti	:= $(foreach m,$(hostprogs),\
		   $(if $($(m)-cxxobjs)$($(m)-rust),,$(if $($(m)-objs),$(m))))

# Object (.o) files compiled from .c files
host-cobjs	:= $(sort $(foreach m,$(hostprogs),$($(m)-objs)))

# C++ code
# C++ executables compiled from at least one .cc file
# and zero or more .c files
host-cxxmulti	:= $(foreach m,$(hostprogs),$(if $($(m)-cxxobjs),$(m)))

# C++ Object (.o) files compiled from .cc files
host-cxxobjs	:= $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs)))

# Rust code
# Executables compiled from a single Rust crate (which may consist of
# one or more .rs files)
host-rust	:= $(foreach m,$(hostprogs),$(if $($(m)-rust),$(m)))

host-csingle	:= $(addprefix $(obj)/,$(host-csingle))
host-cmulti	:= $(addprefix $(obj)/,$(host-cmulti))
host-cobjs	:= $(addprefix $(obj)/,$(host-cobjs))
host-cxxmulti	:= $(addprefix $(obj)/,$(host-cxxmulti))
host-cxxobjs	:= $(addprefix $(obj)/,$(host-cxxobjs))
host-rust	:= $(addprefix $(obj)/,$(host-rust))

#####
# Handle options to gcc. Support building with separate output directory

hostc_flags    = -Wp,-MMD,$(depfile) \
                 $(KBUILD_HOSTCFLAGS) $(HOST_EXTRACFLAGS) \
                 $(HOSTCFLAGS_$(target-stem).o)
hostcxx_flags  = -Wp,-MMD,$(depfile) \
                 $(KBUILD_HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \
                 $(HOSTCXXFLAGS_$(target-stem).o)
hostrust_flags = --emit=dep-info=$(depfile) \
                 $(KBUILD_HOSTRUSTFLAGS) $(HOST_EXTRARUSTFLAGS) \
                 $(HOSTRUSTFLAGS_$(target-stem))

# $(objtree)/$(obj) for including generated headers from checkin source files
ifeq ($(KBUILD_EXTMOD),)
ifdef building_out_of_srctree
hostc_flags   += -I $(objtree)/$(obj)
hostcxx_flags += -I $(objtree)/$(obj)
endif
endif

#####
# Compile programs on the host

# Create executable from a single .c file
# host-csingle -> Executable
quiet_cmd_host-csingle 	= HOSTCC  $@
      cmd_host-csingle	= $(HOSTCC) $(hostc_flags) $(KBUILD_HOSTLDFLAGS) -o $@ $< \
		$(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
$(host-csingle): $(obj)/%: $(src)/%.c FORCE
	$(call if_changed_dep,host-csingle)

# Link an executable based on list of .o files, all plain c
# host-cmulti -> executable
quiet_cmd_host-cmulti	= HOSTLD  $@
      cmd_host-cmulti	= $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -o $@ \
			  $(addprefix $(obj)/, $($(target-stem)-objs)) \
			  $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
$(host-cmulti): FORCE
	$(call if_changed,host-cmulti)
$(call multi_depend, $(host-cmulti), , -objs)

# Create .o file from a single .c file
# host-cobjs -> .o
quiet_cmd_host-cobjs	= HOSTCC  $@
      cmd_host-cobjs	= $(HOSTCC) $(hostc_flags) -c -o $@ $<
$(host-cobjs): $(obj)/%.o: $(src)/%.c FORCE
	$(call if_changed_dep,host-cobjs)

# Link an executable based on list of .o files, a mixture of .c and .cc
# host-cxxmulti -> executable
quiet_cmd_host-cxxmulti	= HOSTLD  $@
      cmd_host-cxxmulti	= $(HOSTCXX) $(KBUILD_HOSTLDFLAGS) -o $@ \
			  $(foreach o,objs cxxobjs,\
			  $(addprefix $(obj)/, $($(target-stem)-$(o)))) \
			  $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
$(host-cxxmulti): FORCE
	$(call if_changed,host-cxxmulti)
$(call multi_depend, $(host-cxxmulti), , -objs -cxxobjs)

# Create .o file from a single .cc (C++) file
quiet_cmd_host-cxxobjs	= HOSTCXX $@
      cmd_host-cxxobjs	= $(HOSTCXX) $(hostcxx_flags) -c -o $@ $<
$(host-cxxobjs): $(obj)/%.o: $(src)/%.cc FORCE
	$(call if_changed_dep,host-cxxobjs)

# Create executable from a single Rust crate (which may consist of
# one or more `.rs` files)
# host-rust -> Executable
quiet_cmd_host-rust	= HOSTRUSTC $@
      cmd_host-rust	= \
	$(HOSTRUSTC) $(hostrust_flags) --emit=link=$@ $<
$(host-rust): $(obj)/%: $(src)/%.rs FORCE
	$(call if_changed_dep,host-rust)

targets += $(host-csingle) $(host-cmulti) $(host-cobjs) \
	   $(host-cxxmulti) $(host-cxxobjs) $(host-rust)