scripts/Makefile.host

   1 # SPDX-License-Identifier: GPL-2.0
   2
   3 # LEX
   4 # ---------------------------------------------------------------------------
   5 quiet_cmd_flex = LEX     $@
   6       cmd_flex = $(LEX) -o$@ -L $<
   7
   8 $(obj)/%.lex.c: $(src)/%.l FORCE
   9         $(call if_changed,flex)
  10
  11 # YACC
  12 # ---------------------------------------------------------------------------
  13 quiet_cmd_bison = YACC    $(basename $@).[ch]
  14       cmd_bison = $(YACC) -o $(basename $@).c --defines=$(basename $@).h -t -l $<
  15
  16 $(obj)/%.tab.c $(obj)/%.tab.h: $(src)/%.y FORCE
  17         $(call if_changed,bison)
  18
  19 # ==========================================================================
  20 # Building binaries on the host system
  21 # Binaries are used during the compilation of the kernel, for example
  22 # to preprocess a data file.
  23 #
  24 # Both C and C++ are supported, but preferred language is C for such utilities.
  25 #
  26 # Sample syntax (see Documentation/kbuild/makefiles.rst for reference)
  27 # hostprogs := bin2hex
  28 # Will compile bin2hex.c and create an executable named bin2hex
  29 #
  30 # hostprogs     := lxdialog
  31 # lxdialog-objs := checklist.o lxdialog.o
  32 # Will compile lxdialog.c and checklist.c, and then link the executable
  33 # lxdialog, based on checklist.o and lxdialog.o
  34 #
  35 # hostprogs       := qconf
  36 # qconf-cxxobjs   := qconf.o
  37 # qconf-objs      := menu.o
  38 # Will compile qconf as a C++ program, and menu as a C program.
  39 # They are linked as C++ code to the executable qconf
  40
  41 __hostprogs := $(sort $(hostprogs))
  42 host-cxxshlib := $(sort $(hostcxxlibs-y) $(hostcxxlibs-m))
  43
  44 # C code
  45 # Executables compiled from a single .c file
  46 host-csingle    := $(foreach m,$(__hostprogs), \
  47                         $(if $($(m)-objs)$($(m)-cxxobjs),,$(m)))
  48
  49 # C executables linked based on several .o files
  50 host-cmulti     := $(foreach m,$(__hostprogs),\
  51                    $(if $($(m)-cxxobjs),,$(if $($(m)-objs),$(m))))
  52
  53 # Object (.o) files compiled from .c files
  54 host-cobjs      := $(sort $(foreach m,$(__hostprogs),$($(m)-objs)))
  55
  56 # C++ code
  57 # C++ executables compiled from at least one .cc file
  58 # and zero or more .c files
  59 host-cxxmulti   := $(foreach m,$(__hostprogs),$(if $($(m)-cxxobjs),$(m)))
  60
  61 # C++ Object (.o) files compiled from .cc files
  62 host-cxxobjs    := $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs)))
  63
  64 # Object (.o) files used by the shared libaries
  65 host-cxxshobjs  := $(sort $(foreach m,$(host-cxxshlib),$($(m:.so=-objs))))
  66
  67 host-csingle    := $(addprefix $(obj)/,$(host-csingle))
  68 host-cmulti     := $(addprefix $(obj)/,$(host-cmulti))
  69 host-cobjs      := $(addprefix $(obj)/,$(host-cobjs))
  70 host-cxxmulti   := $(addprefix $(obj)/,$(host-cxxmulti))
  71 host-cxxobjs    := $(addprefix $(obj)/,$(host-cxxobjs))
  72 host-cxxshlib   := $(addprefix $(obj)/,$(host-cxxshlib))
  73 host-cxxshobjs  := $(addprefix $(obj)/,$(host-cxxshobjs))
  74
  75 #####
  76 # Handle options to gcc. Support building with separate output directory
  77
  78 _hostc_flags   = $(KBUILD_HOSTCFLAGS)   $(HOST_EXTRACFLAGS)   \
  79                  $(HOSTCFLAGS_$(target-stem).o)
  80 _hostcxx_flags = $(KBUILD_HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \
  81                  $(HOSTCXXFLAGS_$(target-stem).o)
  82
  83 # $(objtree)/$(obj) for including generated headers from checkin source files
  84 ifeq ($(KBUILD_EXTMOD),)
  85 ifdef building_out_of_srctree
  86 _hostc_flags   += -I $(objtree)/$(obj)
  87 _hostcxx_flags += -I $(objtree)/$(obj)
  88 endif
  89 endif
  90
  91 hostc_flags    = -Wp,-MD,$(depfile) $(_hostc_flags)
  92 hostcxx_flags  = -Wp,-MD,$(depfile) $(_hostcxx_flags)
  93
  94 #####
  95 # Compile programs on the host
  96
  97 # Create executable from a single .c file
  98 # host-csingle -> Executable
  99 quiet_cmd_host-csingle  = HOSTCC  $@
 100       cmd_host-csingle  = $(HOSTCC) $(hostc_flags) $(KBUILD_HOSTLDFLAGS) -o $@ $< \
 101                 $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
 102 $(host-csingle): $(obj)/%: $(src)/%.c FORCE
 103         $(call if_changed_dep,host-csingle)
 104
 105 # Link an executable based on list of .o files, all plain c
 106 # host-cmulti -> executable
 107 quiet_cmd_host-cmulti   = HOSTLD  $@
 108       cmd_host-cmulti   = $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -o $@ \
 109                           $(addprefix $(obj)/, $($(target-stem)-objs)) \
 110                           $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
 111 $(host-cmulti): FORCE
 112         $(call if_changed,host-cmulti)
 113 $(call multi_depend, $(host-cmulti), , -objs)
 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): $(obj)/%.o: $(src)/%.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) $(KBUILD_HOSTLDFLAGS) -o $@ \
 126                           $(foreach o,objs cxxobjs,\
 127                           $(addprefix $(obj)/, $($(target-stem)-$(o)))) \
 128                           $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
 129 $(host-cxxmulti): FORCE
 130         $(call if_changed,host-cxxmulti)
 131 $(call multi_depend, $(host-cxxmulti), , -objs -cxxobjs)
 132
 133 # Create .o file from a single .cc (C++) file
 134 quiet_cmd_host-cxxobjs  = HOSTCXX $@
 135       cmd_host-cxxobjs  = $(HOSTCXX) $(hostcxx_flags) -c -o $@ $<
 136 $(host-cxxobjs): $(obj)/%.o: $(src)/%.cc FORCE
 137         $(call if_changed_dep,host-cxxobjs)
 138
 139 # Compile .c file, create position independent .o file
 140 # Note that plugin capable gcc versions can be either C or C++ based
 141 # therefore plugin source files have to be compilable in both C and C++ mode.
 142 # This is why a C++ compiler is invoked on a .c file.
 143 # host-cxxshobjs -> .o
 144 quiet_cmd_host-cxxshobjs        = HOSTCXX -fPIC $@
 145       cmd_host-cxxshobjs        = $(HOSTCXX) $(hostcxx_flags) -fPIC -c -o $@ $<
 146 $(host-cxxshobjs): $(obj)/%.o: $(src)/%.c FORCE
 147         $(call if_changed_dep,host-cxxshobjs)
 148
 149 # Link a shared library, based on position independent .o files
 150 # *.o -> .so shared library (host-cxxshlib)
 151 quiet_cmd_host-cxxshlib = HOSTLLD -shared $@
 152       cmd_host-cxxshlib = $(HOSTCXX) $(KBUILD_HOSTLDFLAGS) -shared -o $@ \
 153                           $(addprefix $(obj)/, $($(target-stem)-objs)) \
 154                           $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem).so)
 155 $(host-cxxshlib): FORCE
 156         $(call if_changed,host-cxxshlib)
 157 $(call multi_depend, $(host-cxxshlib), .so, -objs)
 158
 159 targets += $(host-csingle)  $(host-cmulti) $(host-cobjs)\
 160            $(host-cxxmulti) $(host-cxxobjs) $(host-cxxshlib) $(host-cxxshobjs)