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)
133