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 # 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 consists of
  27 # expr.o and type.o (they are both compiled as C code and the object files
  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 # C code
  36 # Executables compiled from a single .c file
  37 host-csingle    := $(foreach m,$(__hostprogs),$(if $($(m)-objs),,$(m)))
  38
  39 # C executables linked based on several .o files
  40 host-cmulti     := $(foreach m,$(__hostprogs),\
  41                    $(if $($(m)-cxxobjs),,$(if $($(m)-objs),$(m))))
  42
  43 # Object (.o) files compiled from .c files
  44 host-cobjs      := $(sort $(foreach m,$(__hostprogs),$($(m)-objs)))
  45
  46 # C++ code
  47 # C++ executables compiled from at least on .cc file
  48 # and zero or more .c files
  49 host-cxxmulti   := $(foreach m,$(__hostprogs),$(if $($(m)-cxxobjs),$(m)))
  50
  51 # C++ Object (.o) files compiled from .cc files
  52 host-cxxobjs    := $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs)))
  53
  54 # Shared libaries (only .c supported)
  55 # Shared libraries (.so) - all .so files referenced in "xxx-objs"
  56 host-cshlib     := $(sort $(filter %.so, $(host-cobjs)))
  57 # Remove .so files from "xxx-objs"
  58 host-cobjs      := $(filter-out %.so,$(host-cobjs))
  59
  60 #Object (.o) files used by the shared libaries
  61 host-cshobjs    := $(sort $(foreach m,$(host-cshlib),$($(m:.so=-objs))))
  62
  63 # output directory for programs/.o files
  64 # hostprogs-y := tools/build may have been specified. Retrieve directory
  65 host-objdirs := $(foreach f,$(__hostprogs), $(if $(dir $(f)),$(dir $(f))))
  66 # directory of .o files from prog-objs notation
  67 host-objdirs += $(foreach f,$(host-cmulti),                  \
  68                     $(foreach m,$($(f)-objs),                \
  69                         $(if $(dir $(m)),$(dir $(m)))))
  70 # directory of .o files from prog-cxxobjs notation
  71 host-objdirs += $(foreach f,$(host-cxxmulti),                  \
  72                     $(foreach m,$($(f)-cxxobjs),                \
  73                         $(if $(dir $(m)),$(dir $(m)))))
  74
  75 host-objdirs := $(strip $(sort $(filter-out ./,$(host-objdirs))))
  76
  77
  78 __hostprogs     := $(addprefix $(obj)/,$(__hostprogs))
  79 host-csingle    := $(addprefix $(obj)/,$(host-csingle))
  80 host-cmulti     := $(addprefix $(obj)/,$(host-cmulti))
  81 host-cobjs      := $(addprefix $(obj)/,$(host-cobjs))
  82 host-cxxmulti   := $(addprefix $(obj)/,$(host-cxxmulti))
  83 host-cxxobjs    := $(addprefix $(obj)/,$(host-cxxobjs))
  84 host-cshlib     := $(addprefix $(obj)/,$(host-cshlib))
  85 host-cshobjs    := $(addprefix $(obj)/,$(host-cshobjs))
  86 host-objdirs    := $(addprefix $(obj)/,$(host-objdirs))
  87
  88 obj-dirs += $(host-objdirs)
  89
  90 #####
  91 # Handle options to gcc. Support building with separate output directory
  92
  93 _hostc_flags   = $(HOSTCFLAGS)   $(HOST_EXTRACFLAGS)   \
  94                  $(HOSTCFLAGS_$(basetarget).o)
  95 _hostcxx_flags = $(HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \
  96                  $(HOSTCXXFLAGS_$(basetarget).o)
  97
  98 ifeq ($(KBUILD_SRC),)
  99 __hostc_flags   = $(_hostc_flags)
 100 __hostcxx_flags = $(_hostcxx_flags)
 101 else
 102 __hostc_flags   = -I$(obj) $(call flags,_hostc_flags)
 103 __hostcxx_flags = -I$(obj) $(call flags,_hostcxx_flags)
 104 endif
 105
 106 hostc_flags    = -Wp,-MD,$(depfile) $(__hostc_flags)
 107 hostcxx_flags  = -Wp,-MD,$(depfile) $(__hostcxx_flags)
 108
 109 #####
 110 # Compile programs on the host
 111
 112 # Create executable from a single .c file
 113 # host-csingle -> Executable
 114 quiet_cmd_host-csingle  = HOSTCC  $@
 115       cmd_host-csingle  = $(HOSTCC) $(hostc_flags) -o $@ $< \
 116                 $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
 117 $(host-csingle): $(obj)/%: $(src)/%.c FORCE
 118         $(call if_changed_dep,host-csingle)
 119
 120 # Link an executable based on list of .o files, all plain c
 121 # host-cmulti -> executable
 122 quiet_cmd_host-cmulti   = HOSTLD  $@
 123       cmd_host-cmulti   = $(HOSTCC) $(HOSTLDFLAGS) -o $@ \
 124                           $(addprefix $(obj)/,$($(@F)-objs)) \
 125                           $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
 126 $(host-cmulti): $(obj)/%: $(host-cobjs) $(host-cshlib) FORCE
 127         $(call if_changed,host-cmulti)
 128
 129 # Create .o file from a single .c file
 130 # host-cobjs -> .o
 131 quiet_cmd_host-cobjs    = HOSTCC  $@
 132       cmd_host-cobjs    = $(HOSTCC) $(hostc_flags) -c -o $@ $<
 133 $(host-cobjs): $(obj)/%.o: $(src)/%.c FORCE
 134         $(call if_changed_dep,host-cobjs)
 135
 136 # Link an executable based on list of .o files, a mixture of .c and .cc
 137 # host-cxxmulti -> executable
 138 quiet_cmd_host-cxxmulti = HOSTLD  $@
 139       cmd_host-cxxmulti = $(HOSTCXX) $(HOSTLDFLAGS) -o $@ \
 140                           $(foreach o,objs cxxobjs,\
 141                           $(addprefix $(obj)/,$($(@F)-$(o)))) \
 142                           $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
 143 $(host-cxxmulti): $(obj)/%: $(host-cobjs) $(host-cxxobjs) $(host-cshlib) FORCE
 144         $(call if_changed,host-cxxmulti)
 145
 146 # Create .o file from a single .cc (C++) file
 147 quiet_cmd_host-cxxobjs  = HOSTCXX $@
 148       cmd_host-cxxobjs  = $(HOSTCXX) $(hostcxx_flags) -c -o $@ $<
 149 $(host-cxxobjs): $(obj)/%.o: $(src)/%.cc FORCE
 150         $(call if_changed_dep,host-cxxobjs)
 151
 152 # Compile .c file, create position independent .o file
 153 # host-cshobjs -> .o
 154 quiet_cmd_host-cshobjs  = HOSTCC  -fPIC $@
 155       cmd_host-cshobjs  = $(HOSTCC) $(hostc_flags) -fPIC -c -o $@ $<
 156 $(host-cshobjs): $(obj)/%.o: $(src)/%.c FORCE
 157         $(call if_changed_dep,host-cshobjs)
 158
 159 # Link a shared library, based on position independent .o files
 160 # *.o -> .so shared library (host-cshlib)
 161 quiet_cmd_host-cshlib   = HOSTLLD -shared $@
 162       cmd_host-cshlib   = $(HOSTCC) $(HOSTLDFLAGS) -shared -o $@ \
 163                           $(addprefix $(obj)/,$($(@F:.so=-objs))) \
 164                           $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
 165 $(host-cshlib): $(obj)/%: $(host-cshobjs) FORCE
 166         $(call if_changed,host-cshlib)
 167
 168 targets += $(host-csingle)  $(host-cmulti) $(host-cobjs)\
 169            $(host-cxxmulti) $(host-cxxobjs) $(host-cshlib) $(host-cshobjs)
 170