1 # ==========================================================================
2 # Building binaries on the host system
3 # Binaries are used during the compilation of the kernel, for example
4 # to preprocess a data file.
6 # Both C and C++ are supported, but preferred language is C for such utilities.
8 # Sample syntax (see Documentation/kbuild/makefiles.txt for reference)
9 # hostprogs-y := bin2hex
10 # Will compile bin2hex.c and create an executable named bin2hex
12 # hostprogs-y := lxdialog
13 # lxdialog-objs := checklist.o lxdialog.o
14 # Will compile lxdialog.c and checklist.c, and then link the executable
15 # lxdialog, based on checklist.o and lxdialog.o
17 # hostprogs-y := qconf
18 # qconf-cxxobjs := qconf.o
19 # qconf-objs := menu.o
20 # Will compile qconf as a C++ program, and menu as a C program.
21 # They are linked as C++ code to the executable qconf
24 # Usage: cflags-y += $(call hostcc-option,-march=winchip-c6,-march=i586)
26 hostcc-option = $(call try-run,\
27 $(HOSTCC) $(HOSTCFLAGS) $(HOST_EXTRACFLAGS) $(1) -c -x c /dev/null -o "$$TMP",$(1),$(2))
29 __hostprogs := $(sort $(hostprogs-y) $(hostprogs-m))
30 host-cshlib := $(sort $(hostlibs-y) $(hostlibs-m))
31 host-cxxshlib := $(sort $(hostcxxlibs-y) $(hostcxxlibs-m))
34 # Executables compiled from a single .c file
35 host-csingle := $(foreach m,$(__hostprogs), \
36 $(if $($(m)-objs)$($(m)-cxxobjs),,$(m)))
38 # C executables linked based on several .o files
39 host-cmulti := $(foreach m,$(__hostprogs),\
40 $(if $($(m)-cxxobjs),,$(if $($(m)-objs),$(m))))
42 # Object (.o) files compiled from .c files
43 host-cobjs := $(sort $(foreach m,$(__hostprogs),$($(m)-objs)))
46 # C++ executables compiled from at least one .cc file
47 # and zero or more .c files
48 host-cxxmulti := $(foreach m,$(__hostprogs),$(if $($(m)-cxxobjs),$(m)))
50 # C++ Object (.o) files compiled from .cc files
51 host-cxxobjs := $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs)))
53 # Object (.o) files used by the shared libaries
54 host-cshobjs := $(sort $(foreach m,$(host-cshlib),$($(m:.so=-objs))))
55 host-cxxshobjs := $(sort $(foreach m,$(host-cxxshlib),$($(m:.so=-objs))))
57 # output directory for programs/.o files
58 # hostprogs-y := tools/build may have been specified.
59 # Retrieve also directory of .o files from prog-objs or prog-cxxobjs notation
60 host-objdirs := $(dir $(__hostprogs) $(host-cobjs) $(host-cxxobjs))
62 host-objdirs := $(strip $(sort $(filter-out ./,$(host-objdirs))))
65 __hostprogs := $(addprefix $(obj)/,$(__hostprogs))
66 host-csingle := $(addprefix $(obj)/,$(host-csingle))
67 host-cmulti := $(addprefix $(obj)/,$(host-cmulti))
68 host-cobjs := $(addprefix $(obj)/,$(host-cobjs))
69 host-cxxmulti := $(addprefix $(obj)/,$(host-cxxmulti))
70 host-cxxobjs := $(addprefix $(obj)/,$(host-cxxobjs))
71 host-cshlib := $(addprefix $(obj)/,$(host-cshlib))
72 host-cxxshlib := $(addprefix $(obj)/,$(host-cxxshlib))
73 host-cshobjs := $(addprefix $(obj)/,$(host-cshobjs))
74 host-cxxshobjs := $(addprefix $(obj)/,$(host-cxxshobjs))
75 host-objdirs := $(addprefix $(obj)/,$(host-objdirs))
77 obj-dirs += $(host-objdirs)
80 # Handle options to gcc. Support building with separate output directory
82 _hostc_flags = $(HOSTCFLAGS) $(HOST_EXTRACFLAGS) \
83 $(HOSTCFLAGS_$(basetarget).o)
84 _hostcxx_flags = $(HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \
85 $(HOSTCXXFLAGS_$(basetarget).o)
88 __hostc_flags = $(_hostc_flags)
89 __hostcxx_flags = $(_hostcxx_flags)
91 __hostc_flags = -I$(obj) $(call flags,_hostc_flags)
92 __hostcxx_flags = -I$(obj) $(call flags,_hostcxx_flags)
95 hostc_flags = -Wp,-MD,$(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) -o $@ $< \
105 $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
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) $(HOSTLDFLAGS) -o $@ \
113 $(addprefix $(obj)/,$($(@F)-objs)) \
114 $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
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) $(HOSTLDFLAGS) -o $@ \
130 $(foreach o,objs cxxobjs,\
131 $(addprefix $(obj)/,$($(@F)-$(o)))) \
132 $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
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) $(HOSTLDFLAGS) -shared -o $@ \
164 $(addprefix $(obj)/,$($(@F:.so=-objs))) \
165 $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
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) $(HOSTLDFLAGS) -shared -o $@ \
174 $(addprefix $(obj)/,$($(@F:.so=-objs))) \
175 $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
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)