1 # SPDX-License-Identifier: GPL-2.0
4 # ---------------------------------------------------------------------------
5 quiet_cmd_flex = LEX $@
6 cmd_flex = $(LEX) -o$@ -L $<
8 $(obj)/%.lex.c: $(src)/%.l FORCE
9 $(call if_changed,flex)
12 # ---------------------------------------------------------------------------
13 quiet_cmd_bison = YACC $(basename $@).[ch]
14 cmd_bison = $(YACC) -o $(basename $@).c --defines=$(basename $@).h -t -l $<
16 $(obj)/%.tab.c $(obj)/%.tab.h: $(src)/%.y FORCE
17 $(call if_changed,bison)
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.
24 # Both C and C++ are supported, but preferred language is C for such utilities.
26 # Sample syntax (see Documentation/kbuild/makefiles.rst for reference)
27 # hostprogs := bin2hex
28 # Will compile bin2hex.c and create an executable named bin2hex
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
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
41 __hostprogs := $(sort $(hostprogs))
42 host-cshlib := $(sort $(hostlibs-y) $(hostlibs-m))
43 host-cxxshlib := $(sort $(hostcxxlibs-y) $(hostcxxlibs-m))
46 # Executables compiled from a single .c file
47 host-csingle := $(foreach m,$(__hostprogs), \
48 $(if $($(m)-objs)$($(m)-cxxobjs),,$(m)))
50 # C executables linked based on several .o files
51 host-cmulti := $(foreach m,$(__hostprogs),\
52 $(if $($(m)-cxxobjs),,$(if $($(m)-objs),$(m))))
54 # Object (.o) files compiled from .c files
55 host-cobjs := $(sort $(foreach m,$(__hostprogs),$($(m)-objs)))
58 # C++ executables compiled from at least one .cc file
59 # and zero or more .c files
60 host-cxxmulti := $(foreach m,$(__hostprogs),$(if $($(m)-cxxobjs),$(m)))
62 # C++ Object (.o) files compiled from .cc files
63 host-cxxobjs := $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs)))
65 # Object (.o) files used by the shared libaries
66 host-cshobjs := $(sort $(foreach m,$(host-cshlib),$($(m:.so=-objs))))
67 host-cxxshobjs := $(sort $(foreach m,$(host-cxxshlib),$($(m:.so=-objs))))
69 host-csingle := $(addprefix $(obj)/,$(host-csingle))
70 host-cmulti := $(addprefix $(obj)/,$(host-cmulti))
71 host-cobjs := $(addprefix $(obj)/,$(host-cobjs))
72 host-cxxmulti := $(addprefix $(obj)/,$(host-cxxmulti))
73 host-cxxobjs := $(addprefix $(obj)/,$(host-cxxobjs))
74 host-cshlib := $(addprefix $(obj)/,$(host-cshlib))
75 host-cxxshlib := $(addprefix $(obj)/,$(host-cxxshlib))
76 host-cshobjs := $(addprefix $(obj)/,$(host-cshobjs))
77 host-cxxshobjs := $(addprefix $(obj)/,$(host-cxxshobjs))
80 # Handle options to gcc. Support building with separate output directory
82 _hostc_flags = $(KBUILD_HOSTCFLAGS) $(HOST_EXTRACFLAGS) \
83 $(HOSTCFLAGS_$(target-stem).o)
84 _hostcxx_flags = $(KBUILD_HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \
85 $(HOSTCXXFLAGS_$(target-stem).o)
87 # $(objtree)/$(obj) for including generated headers from checkin source files
88 ifeq ($(KBUILD_EXTMOD),)
89 ifdef building_out_of_srctree
90 _hostc_flags += -I $(objtree)/$(obj)
91 _hostcxx_flags += -I $(objtree)/$(obj)
95 hostc_flags = -Wp,-MD,$(depfile) $(_hostc_flags)
96 hostcxx_flags = -Wp,-MD,$(depfile) $(_hostcxx_flags)
99 # Compile programs on the host
101 # Create executable from a single .c file
102 # host-csingle -> Executable
103 quiet_cmd_host-csingle = HOSTCC $@
104 cmd_host-csingle = $(HOSTCC) $(hostc_flags) $(KBUILD_HOSTLDFLAGS) -o $@ $< \
105 $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
106 $(host-csingle): $(obj)/%: $(src)/%.c FORCE
107 $(call if_changed_dep,host-csingle)
109 # Link an executable based on list of .o files, all plain c
110 # host-cmulti -> executable
111 quiet_cmd_host-cmulti = HOSTLD $@
112 cmd_host-cmulti = $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -o $@ \
113 $(addprefix $(obj)/, $($(target-stem)-objs)) \
114 $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
115 $(host-cmulti): FORCE
116 $(call if_changed,host-cmulti)
117 $(call multi_depend, $(host-cmulti), , -objs)
119 # Create .o file from a single .c file
121 quiet_cmd_host-cobjs = HOSTCC $@
122 cmd_host-cobjs = $(HOSTCC) $(hostc_flags) -c -o $@ $<
123 $(host-cobjs): $(obj)/%.o: $(src)/%.c FORCE
124 $(call if_changed_dep,host-cobjs)
126 # Link an executable based on list of .o files, a mixture of .c and .cc
127 # host-cxxmulti -> executable
128 quiet_cmd_host-cxxmulti = HOSTLD $@
129 cmd_host-cxxmulti = $(HOSTCXX) $(KBUILD_HOSTLDFLAGS) -o $@ \
130 $(foreach o,objs cxxobjs,\
131 $(addprefix $(obj)/, $($(target-stem)-$(o)))) \
132 $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
133 $(host-cxxmulti): FORCE
134 $(call if_changed,host-cxxmulti)
135 $(call multi_depend, $(host-cxxmulti), , -objs -cxxobjs)
137 # Create .o file from a single .cc (C++) file
138 quiet_cmd_host-cxxobjs = HOSTCXX $@
139 cmd_host-cxxobjs = $(HOSTCXX) $(hostcxx_flags) -c -o $@ $<
140 $(host-cxxobjs): $(obj)/%.o: $(src)/%.cc FORCE
141 $(call if_changed_dep,host-cxxobjs)
143 # Compile .c file, create position independent .o file
145 quiet_cmd_host-cshobjs = HOSTCC -fPIC $@
146 cmd_host-cshobjs = $(HOSTCC) $(hostc_flags) -fPIC -c -o $@ $<
147 $(host-cshobjs): $(obj)/%.o: $(src)/%.c FORCE
148 $(call if_changed_dep,host-cshobjs)
150 # Compile .c file, create position independent .o file
151 # Note that plugin capable gcc versions can be either C or C++ based
152 # therefore plugin source files have to be compilable in both C and C++ mode.
153 # This is why a C++ compiler is invoked on a .c file.
154 # host-cxxshobjs -> .o
155 quiet_cmd_host-cxxshobjs = HOSTCXX -fPIC $@
156 cmd_host-cxxshobjs = $(HOSTCXX) $(hostcxx_flags) -fPIC -c -o $@ $<
157 $(host-cxxshobjs): $(obj)/%.o: $(src)/%.c FORCE
158 $(call if_changed_dep,host-cxxshobjs)
160 # Link a shared library, based on position independent .o files
161 # *.o -> .so shared library (host-cshlib)
162 quiet_cmd_host-cshlib = HOSTLLD -shared $@
163 cmd_host-cshlib = $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -shared -o $@ \
164 $(addprefix $(obj)/, $($(target-stem)-objs)) \
165 $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem).so)
166 $(host-cshlib): FORCE
167 $(call if_changed,host-cshlib)
168 $(call multi_depend, $(host-cshlib), .so, -objs)
170 # Link a shared library, based on position independent .o files
171 # *.o -> .so shared library (host-cxxshlib)
172 quiet_cmd_host-cxxshlib = HOSTLLD -shared $@
173 cmd_host-cxxshlib = $(HOSTCXX) $(KBUILD_HOSTLDFLAGS) -shared -o $@ \
174 $(addprefix $(obj)/, $($(target-stem)-objs)) \
175 $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem).so)
176 $(host-cxxshlib): FORCE
177 $(call if_changed,host-cxxshlib)
178 $(call multi_depend, $(host-cxxshlib), .so, -objs)
180 targets += $(host-csingle) $(host-cmulti) $(host-cobjs)\
181 $(host-cxxmulti) $(host-cxxobjs) $(host-cshlib) $(host-cshobjs) $(host-cxxshlib) $(host-cxxshobjs)