busybox/scripts/Makefile.host

# ==========================================================================
# 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++ is supported, but preferred language is C for such utilities.
#
# Samle syntax (see Documentation/kbuild/makefile.txt for reference)
# hostprogs-y := bin2hex
# Will compile bin2hex.c and create an executable named bin2hex
#
# hostprogs-y    := 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-y      := 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-y := conf
# conf-objs  := conf.o libkconfig.so
# libkconfig-objs := expr.o type.o
# Will create a shared library named libkconfig.so that consist of
# expr.o and type.o (they are both compiled as C code and the object file
# are made as position independent code).
# conf.c is compiled as a c program, and conf.o is linked together with
# libkconfig.so as the executable conf.
# Note: Shared libraries consisting of C++ files are not supported

__hostprogs := $(sort $(hostprogs-y)$(hostprogs-m))

# hostprogs-y := tools/build may have been specified. Retreive directory
obj-dirs += $(foreach f,$(__hostprogs), $(if $(dir $(f)),$(dir $(f))))
obj-dirs := $(strip $(sort $(filter-out ./,$(obj-dirs))))


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

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

# Shared libaries (only .c supported)
# Shared libraries (.so) - all .so files referenced in "xxx-objs"
host-cshlib	:= $(sort $(filter %.so, $(host-cobjs)))
# Remove .so files from "xxx-objs"
host-cobjs	:= $(filter-out %.so,$(host-cobjs))

#Object (.o) files used by the shared libaries
host-cshobjs	:= $(sort $(foreach m,$(host-cshlib),$($(m:.so=-objs))))

__hostprogs     := $(addprefix $(obj)/,$(__hostprogs))
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-cshlib	:= $(addprefix $(obj)/,$(host-cshlib))
host-cshobjs	:= $(addprefix $(obj)/,$(host-cshobjs))
obj-dirs        := $(addprefix $(obj)/,$(obj-dirs))

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

_hostc_flags   = $(HOSTCFLAGS)   $(HOST_EXTRACFLAGS)   $(HOSTCFLAGS_$(*F).o)
_hostcxx_flags = $(HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) $(HOSTCXXFLAGS_$(*F).o)

ifeq ($(KBUILD_SRC),)
__hostc_flags	= $(_hostc_flags)
__hostcxx_flags	= $(_hostcxx_flags)
else
__hostc_flags	= -I$(obj) $(call flags,_hostc_flags)
__hostcxx_flags	= -I$(obj) $(call flags,_hostcxx_flags)
endif

hostc_flags    = -Wp,-MD,$(depfile) $(__hostc_flags)
hostcxx_flags  = -Wp,-MD,$(depfile) $(__hostcxx_flags)

#####
# 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) -o $@ $< \
			  $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
$(host-csingle): %: %.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) $(HOSTLDFLAGS) -o $@ \
			  $(addprefix $(obj)/,$($(@F)-objs)) \
			  $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
$(host-cmulti): %: $(host-cobjs) $(host-cshlib) FORCE
	$(call if_changed,host-cmulti)

# 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): %.o: %.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) $(HOSTLDFLAGS) -o $@ \
			  $(foreach o,objs cxxobjs,\
			  $(addprefix $(obj)/,$($(@F)-$(o)))) \
			  $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
$(host-cxxmulti): %: $(host-cobjs) $(host-cxxobjs) $(host-cshlib) FORCE
	$(call if_changed,host-cxxmulti)

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

# Compile .c file, create position independent .o file
# host-cshobjs -> .o
quiet_cmd_host-cshobjs	= HOSTCC  -fPIC $@
      cmd_host-cshobjs	= $(HOSTCC) $(hostc_flags) -fPIC -c -o $@ $<
$(host-cshobjs): %.o: %.c FORCE
	$(call if_changed_dep,host-cshobjs)

# Link a shared library, based on position independent .o files
# *.o -> .so shared library (host-cshlib)
quiet_cmd_host-cshlib	= HOSTLLD -shared $@
      cmd_host-cshlib	= $(HOSTCC) $(HOSTLDFLAGS) -shared -o $@ \
			  $(addprefix $(obj)/,$($(@F:.so=-objs))) \
			  $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
$(host-cshlib): %: $(host-cshobjs) FORCE
	$(call if_changed,host-cshlib)

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

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.
5	#
6	# Both C and C++ is supported, but preferred language is C for such utilities.
7	#
8	# Samle syntax (see Documentation/kbuild/makefile.txt for reference)
9	# hostprogs-y := bin2hex
10	# Will compile bin2hex.c and create an executable named bin2hex
11	#
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
16	#
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
22
23	# hostprogs-y := conf
24	# conf-objs := conf.o libkconfig.so
25	# libkconfig-objs := expr.o type.o
26	# Will create a shared library named libkconfig.so that consist of
27	# expr.o and type.o (they are both compiled as C code and the object file
28	# are made as position independent code).
29	# conf.c is compiled as a c program, and conf.o is linked together with
30	# libkconfig.so as the executable conf.
31	# Note: Shared libraries consisting of C++ files are not supported
32
33	__hostprogs := $(sort $(hostprogs-y)$(hostprogs-m))
34
35	# hostprogs-y := tools/build may have been specified. Retreive directory
36	obj-dirs += $(foreach f,$(__hostprogs), $(if $(dir $(f)),$(dir $(f))))
37	obj-dirs := $(strip $(sort $(filter-out ./,$(obj-dirs))))
38
39
40	# C code
41	# Executables compiled from a single .c file
42	host-csingle := $(foreach m,$(__hostprogs),$(if $($(m)-objs),,$(m)))
43
44	# C executables linked based on several .o files
45	host-cmulti := $(foreach m,$(__hostprogs),\
46	$(if $($(m)-cxxobjs),,$(if $($(m)-objs),$(m))))
47
48	# Object (.o) files compiled from .c files
49	host-cobjs := $(sort $(foreach m,$(__hostprogs),$($(m)-objs)))
50
51	# C++ code
52	# C++ executables compiled from at least on .cc file
53	# and zero or more .c files
54	host-cxxmulti := $(foreach m,$(__hostprogs),$(if $($(m)-cxxobjs),$(m)))
55
56	# C++ Object (.o) files compiled from .cc files
57	host-cxxobjs := $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs)))
58
59	# Shared libaries (only .c supported)
60	# Shared libraries (.so) - all .so files referenced in "xxx-objs"
61	host-cshlib := $(sort $(filter %.so, $(host-cobjs)))
62	# Remove .so files from "xxx-objs"
63	host-cobjs := $(filter-out %.so,$(host-cobjs))
64
65	#Object (.o) files used by the shared libaries
66	host-cshobjs := $(sort $(foreach m,$(host-cshlib),$($(m:.so=-objs))))
67
68	__hostprogs := $(addprefix $(obj)/,$(__hostprogs))
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-cshobjs := $(addprefix $(obj)/,$(host-cshobjs))
76	obj-dirs := $(addprefix $(obj)/,$(obj-dirs))
77
78	#####
79	# Handle options to gcc. Support building with separate output directory
80
81	_hostc_flags = $(HOSTCFLAGS) $(HOST_EXTRACFLAGS) $(HOSTCFLAGS_$(*F).o)
82	_hostcxx_flags = $(HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) $(HOSTCXXFLAGS_$(*F).o)
83
84	ifeq ($(KBUILD_SRC),)
85	__hostc_flags = $(_hostc_flags)
86	__hostcxx_flags = $(_hostcxx_flags)
87	else
88	__hostc_flags = -I$(obj) $(call flags,_hostc_flags)
89	__hostcxx_flags = -I$(obj) $(call flags,_hostcxx_flags)
90	endif
91
92	hostc_flags = -Wp,-MD,$(depfile) $(__hostc_flags)
93	hostcxx_flags = -Wp,-MD,$(depfile) $(__hostcxx_flags)
94
95	#####
96	# Compile programs on the host
97
98	# Create executable from a single .c file
99	# host-csingle -> Executable
100	quiet_cmd_host-csingle = HOSTCC $@
101	cmd_host-csingle = $(HOSTCC) $(hostc_flags) -o $@ $< \
102	$(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
103	$(host-csingle): %: %.c FORCE
104	$(call if_changed_dep,host-csingle)
105
106	# Link an executable based on list of .o files, all plain c
107	# host-cmulti -> executable
108	quiet_cmd_host-cmulti = HOSTLD $@
109	cmd_host-cmulti = $(HOSTCC) $(HOSTLDFLAGS) -o $@ \
110	$(addprefix $(obj)/,$($(@F)-objs)) \
111	$(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
112	$(host-cmulti): %: $(host-cobjs) $(host-cshlib) FORCE
113	$(call if_changed,host-cmulti)
114
115	# Create .o file from a single .c file
116	# host-cobjs -> .o
117	quiet_cmd_host-cobjs = HOSTCC $@
118	cmd_host-cobjs = $(HOSTCC) $(hostc_flags) -c -o $@ $<
119	$(host-cobjs): %.o: %.c FORCE
120	$(call if_changed_dep,host-cobjs)
121
122	# Link an executable based on list of .o files, a mixture of .c and .cc
123	# host-cxxmulti -> executable
124	quiet_cmd_host-cxxmulti = HOSTLD $@
125	cmd_host-cxxmulti = $(HOSTCXX) $(HOSTLDFLAGS) -o $@ \
126	$(foreach o,objs cxxobjs,\
127	$(addprefix $(obj)/,$($(@F)-$(o)))) \
128	$(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
129	$(host-cxxmulti): %: $(host-cobjs) $(host-cxxobjs) $(host-cshlib) FORCE
130	$(call if_changed,host-cxxmulti)
131
132	# Create .o file from a single .cc (C++) file
133	quiet_cmd_host-cxxobjs = HOSTCXX $@
134	cmd_host-cxxobjs = $(HOSTCXX) $(hostcxx_flags) -c -o $@ $<
135	$(host-cxxobjs): %.o: %.cc FORCE
136	$(call if_changed_dep,host-cxxobjs)
137
138	# Compile .c file, create position independent .o file
139	# host-cshobjs -> .o
140	quiet_cmd_host-cshobjs = HOSTCC -fPIC $@
141	cmd_host-cshobjs = $(HOSTCC) $(hostc_flags) -fPIC -c -o $@ $<
142	$(host-cshobjs): %.o: %.c FORCE
143	$(call if_changed_dep,host-cshobjs)
144
145	# Link a shared library, based on position independent .o files
146	# *.o -> .so shared library (host-cshlib)
147	quiet_cmd_host-cshlib = HOSTLLD -shared $@
148	cmd_host-cshlib = $(HOSTCC) $(HOSTLDFLAGS) -shared -o $@ \
149	$(addprefix $(obj)/,$($(@F:.so=-objs))) \
150	$(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
151	$(host-cshlib): %: $(host-cshobjs) FORCE
152	$(call if_changed,host-cshlib)
153
154	targets += $(host-csingle) $(host-cmulti) $(host-cobjs)\
155	$(host-cxxmulti) $(host-cxxobjs) $(host-cshlib) $(host-cshobjs)
156