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 := $(sort $(hostprogs-y) $(hostprogs-m))
  24 host-cshlib := $(sort $(hostlibs-y) $(hostlibs-m))
  25 host-cxxshlib := $(sort $(hostcxxlibs-y) $(hostcxxlibs-m))
  26
  27 # C code
  28 # Executables compiled from a single .c file
  29 host-csingle    := $(foreach m,$(__hostprogs), \
  30                         $(if $($(m)-objs)$($(m)-cxxobjs),,$(m)))
  31
  32 # C executables linked based on several .o files
  33 host-cmulti     := $(foreach m,$(__hostprogs),\
  34                    $(if $($(m)-cxxobjs),,$(if $($(m)-objs),$(m))))
  35
  36 # Object (.o) files compiled from .c files
  37 host-cobjs      := $(sort $(foreach m,$(__hostprogs),$($(m)-objs)))
  38
  39 # C++ code
  40 # C++ executables compiled from at least one .cc file
  41 # and zero or more .c files
  42 host-cxxmulti   := $(foreach m,$(__hostprogs),$(if $($(m)-cxxobjs),$(m)))
  43
  44 # C++ Object (.o) files compiled from .cc files
  45 host-cxxobjs    := $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs)))
  46
  47 # Object (.o) files used by the shared libaries
  48 host-cshobjs    := $(sort $(foreach m,$(host-cshlib),$($(m:.so=-objs))))
  49 host-cxxshobjs  := $(sort $(foreach m,$(host-cxxshlib),$($(m:.so=-objs))))
  50
  51 # output directory for programs/.o files
  52 # hostprogs-y := tools/build may have been specified.
  53 # Retrieve also directory of .o files from prog-objs or prog-cxxobjs notation
  54 host-objdirs := $(dir $(__hostprogs) $(host-cobjs) $(host-cxxobjs))
  55
  56 host-objdirs := $(strip $(sort $(filter-out ./,$(host-objdirs))))
  57
  58
  59 __hostprogs     := $(addprefix $(obj)/,$(__hostprogs))
  60 host-csingle    := $(addprefix $(obj)/,$(host-csingle))
  61 host-cmulti     := $(addprefix $(obj)/,$(host-cmulti))
  62 host-cobjs      := $(addprefix $(obj)/,$(host-cobjs))
  63 host-cxxmulti   := $(addprefix $(obj)/,$(host-cxxmulti))
  64 host-cxxobjs    := $(addprefix $(obj)/,$(host-cxxobjs))
  65 host-cshlib     := $(addprefix $(obj)/,$(host-cshlib))
  66 host-cxxshlib   := $(addprefix $(obj)/,$(host-cxxshlib))
  67 host-cshobjs    := $(addprefix $(obj)/,$(host-cshobjs))
  68 host-cxxshobjs  := $(addprefix $(obj)/,$(host-cxxshobjs))
  69 host-objdirs    := $(addprefix $(obj)/,$(host-objdirs))
  70
  71 obj-dirs += $(host-objdirs)
  72
  73 #####
  74 # Handle options to gcc. Support building with separate output directory
  75
  76 _hostc_flags   = $(HOSTCFLAGS)   $(HOST_EXTRACFLAGS)   \
  77                  $(HOSTCFLAGS_$(basetarget).o)
  78 _hostcxx_flags = $(HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \
  79                  $(HOSTCXXFLAGS_$(basetarget).o)
  80
  81 ifeq ($(KBUILD_SRC),)
  82 __hostc_flags   = $(_hostc_flags)
  83 __hostcxx_flags = $(_hostcxx_flags)
  84 else
  85 __hostc_flags   = -I$(obj) $(call flags,_hostc_flags)
  86 __hostcxx_flags = -I$(obj) $(call flags,_hostcxx_flags)
  87 endif
  88
  89 hostc_flags    = -Wp,-MD,$(depfile) $(__hostc_flags)
  90 hostcxx_flags  = -Wp,-MD,$(depfile) $(__hostcxx_flags)
  91
  92 #####
  93 # Compile programs on the host
  94
  95 # Create executable from a single .c file
  96 # host-csingle -> Executable
  97 quiet_cmd_host-csingle  = HOSTCC  $@
  98       cmd_host-csingle  = $(HOSTCC) $(hostc_flags) -o $@ $< \
  99                 $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
 100 $(host-csingle): $(obj)/%: $(src)/%.c FORCE
 101         $(call if_changed_dep,host-csingle)
 102
 103 # Link an executable based on list of .o files, all plain c
 104 # host-cmulti -> executable
 105 quiet_cmd_host-cmulti   = HOSTLD  $@
 106       cmd_host-cmulti   = $(HOSTCC) $(HOSTLDFLAGS) -o $@ \
 107                           $(addprefix $(obj)/,$($(@F)-objs)) \
 108                           $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
 109 $(host-cmulti): FORCE
 110         $(call if_changed,host-cmulti)
 111 $(call multi_depend, $(host-cmulti), , -objs)
 112
 113 # Create .o file from a single .c file
 114 # host-cobjs -> .o
 115 quiet_cmd_host-cobjs    = HOSTCC  $@
 116       cmd_host-cobjs    = $(HOSTCC) $(hostc_flags) -c -o $@ $<
 117 $(host-cobjs): $(obj)/%.o: $(src)/%.c FORCE
 118         $(call if_changed_dep,host-cobjs)
 119
 120 # Link an executable based on list of .o files, a mixture of .c and .cc
 121 # host-cxxmulti -> executable
 122 quiet_cmd_host-cxxmulti = HOSTLD  $@
 123       cmd_host-cxxmulti = $(HOSTCXX) $(HOSTLDFLAGS) -o $@ \
 124                           $(foreach o,objs cxxobjs,\
 125                           $(addprefix $(obj)/,$($(@F)-$(o)))) \
 126                           $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
 127 $(host-cxxmulti): FORCE
 128         $(call if_changed,host-cxxmulti)
 129 $(call multi_depend, $(host-cxxmulti), , -objs -cxxobjs)
 130
 131 # Create .o file from a single .cc (C++) file
 132 quiet_cmd_host-cxxobjs  = HOSTCXX $@
 133       cmd_host-cxxobjs  = $(HOSTCXX) $(hostcxx_flags) -c -o $@ $<
 134 $(host-cxxobjs): $(obj)/%.o: $(src)/%.cc FORCE
 135         $(call if_changed_dep,host-cxxobjs)
 136
 137 # Compile .c file, create position independent .o file
 138 # host-cshobjs -> .o
 139 quiet_cmd_host-cshobjs  = HOSTCC  -fPIC $@
 140       cmd_host-cshobjs  = $(HOSTCC) $(hostc_flags) -fPIC -c -o $@ $<
 141 $(host-cshobjs): $(obj)/%.o: $(src)/%.c FORCE
 142         $(call if_changed_dep,host-cshobjs)
 143
 144 # Compile .c file, create position independent .o file
 145 # Note that plugin capable gcc versions can be either C or C++ based
 146 # therefore plugin source files have to be compilable in both C and C++ mode.
 147 # This is why a C++ compiler is invoked on a .c file.
 148 # host-cxxshobjs -> .o
 149 quiet_cmd_host-cxxshobjs        = HOSTCXX -fPIC $@
 150       cmd_host-cxxshobjs        = $(HOSTCXX) $(hostcxx_flags) -fPIC -c -o $@ $<
 151 $(host-cxxshobjs): $(obj)/%.o: $(src)/%.c FORCE
 152         $(call if_changed_dep,host-cxxshobjs)
 153
 154 # Link a shared library, based on position independent .o files
 155 # *.o -> .so shared library (host-cshlib)
 156 quiet_cmd_host-cshlib   = HOSTLLD -shared $@
 157       cmd_host-cshlib   = $(HOSTCC) $(HOSTLDFLAGS) -shared -o $@ \
 158                           $(addprefix $(obj)/,$($(@F:.so=-objs))) \
 159                           $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
 160 $(host-cshlib): FORCE
 161         $(call if_changed,host-cshlib)
 162 $(call multi_depend, $(host-cshlib), .so, -objs)
 163
 164 # Link a shared library, based on position independent .o files
 165 # *.o -> .so shared library (host-cxxshlib)
 166 quiet_cmd_host-cxxshlib = HOSTLLD -shared $@
 167       cmd_host-cxxshlib = $(HOSTCXX) $(HOSTLDFLAGS) -shared -o $@ \
 168                           $(addprefix $(obj)/,$($(@F:.so=-objs))) \
 169                           $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
 170 $(host-cxxshlib): FORCE
 171         $(call if_changed,host-cxxshlib)
 172 $(call multi_depend, $(host-cxxshlib), .so, -objs)
 173
 174 targets += $(host-csingle)  $(host-cmulti) $(host-cobjs)\
 175            $(host-cxxmulti) $(host-cxxobjs) $(host-cshlib) $(host-cshobjs) $(host-cxxshlib) $(host-cxxshobjs)