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Linux/scripts/Makefile.host

  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++ are supported, but preferred language is C for such utilities.
  7 #
  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
 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 # hostcc-option
 24 # Usage: cflags-y += $(call hostcc-option,-march=winchip-c6,-march=i586)
 25 
 26 hostcc-option = $(call try-run,\
 27         $(HOSTCC) $(HOSTCFLAGS) $(HOST_EXTRACFLAGS) $(1) -c -x c /dev/null -o "$$TMP",$(1),$(2))
 28 
 29 __hostprogs := $(sort $(hostprogs-y) $(hostprogs-m))
 30 host-cshlib := $(sort $(hostlibs-y) $(hostlibs-m))
 31 host-cxxshlib := $(sort $(hostcxxlibs-y) $(hostcxxlibs-m))
 32 
 33 # C code
 34 # Executables compiled from a single .c file
 35 host-csingle    := $(foreach m,$(__hostprogs), \
 36                         $(if $($(m)-objs)$($(m)-cxxobjs),,$(m)))
 37 
 38 # C executables linked based on several .o files
 39 host-cmulti     := $(foreach m,$(__hostprogs),\
 40                    $(if $($(m)-cxxobjs),,$(if $($(m)-objs),$(m))))
 41 
 42 # Object (.o) files compiled from .c files
 43 host-cobjs      := $(sort $(foreach m,$(__hostprogs),$($(m)-objs)))
 44 
 45 # C++ code
 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)))
 49 
 50 # C++ Object (.o) files compiled from .cc files
 51 host-cxxobjs    := $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs)))
 52 
 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))))
 56 
 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))
 61 
 62 host-objdirs := $(strip $(sort $(filter-out ./,$(host-objdirs))))
 63 
 64 
 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))
 76 
 77 obj-dirs += $(host-objdirs)
 78 
 79 #####
 80 # Handle options to gcc. Support building with separate output directory
 81 
 82 _hostc_flags   = $(HOSTCFLAGS)   $(HOST_EXTRACFLAGS)   \
 83                  $(HOSTCFLAGS_$(basetarget).o)
 84 _hostcxx_flags = $(HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \
 85                  $(HOSTCXXFLAGS_$(basetarget).o)
 86 
 87 ifeq ($(KBUILD_SRC),)
 88 __hostc_flags   = $(_hostc_flags)
 89 __hostcxx_flags = $(_hostcxx_flags)
 90 else
 91 __hostc_flags   = -I$(obj) $(call flags,_hostc_flags)
 92 __hostcxx_flags = -I$(obj) $(call flags,_hostcxx_flags)
 93 endif
 94 
 95 hostc_flags    = -Wp,-MD,$(depfile) $(__hostc_flags)
 96 hostcxx_flags  = -Wp,-MD,$(depfile) $(__hostcxx_flags)
 97 
 98 #####
 99 # Compile programs on the host
100 
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)
108 
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)
118 
119 # Create .o file from a single .c file
120 # host-cobjs -> .o
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)
125 
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)
136 
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)
142 
143 # Compile .c file, create position independent .o file
144 # host-cshobjs -> .o
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)
149 
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)
159 
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)
169 
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)
179 
180 targets += $(host-csingle)  $(host-cmulti) $(host-cobjs)\
181            $(host-cxxmulti) $(host-cxxobjs) $(host-cshlib) $(host-cshobjs) $(host-cxxshlib) $(host-cxxshobjs)

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