LXR uboot/scripts/Makefile.host

   1# SPDX-License-Identifier: GPL-2.0
   2# ==========================================================================
   3# Building binaries on the host system
   4# Binaries are used during the compilation of the kernel, for example
   5# to preprocess a data file.
   6#
   7# Both C and C++ are supported, but preferred language is C for such utilities.
   8#
   9# Sample syntax (see Documentation/kbuild/makefiles.txt for reference)
  10# hostprogs-y := bin2hex
  11# Will compile bin2hex.c and create an executable named bin2hex
  12#
  13# hostprogs-y    := lxdialog
  14# lxdialog-objs := checklist.o lxdialog.o
  15# Will compile lxdialog.c and checklist.c, and then link the executable
  16# lxdialog, based on checklist.o and lxdialog.o
  17#
  18# hostprogs-y      := qconf
  19# qconf-cxxobjs   := qconf.o
  20# qconf-objs      := menu.o
  21# Will compile qconf as a C++ program, and menu as a C program.
  22# They are linked as C++ code to the executable qconf
  23
  24__hostprogs := $(sort $(hostprogs-y) $(hostprogs-m))
  25host-cshlib := $(sort $(hostlibs-y) $(hostlibs-m))
  26host-cxxshlib := $(sort $(hostcxxlibs-y) $(hostcxxlibs-m))
  27
  28# C code
  29# Executables compiled from a single .c file
  30host-csingle    := $(foreach m,$(__hostprogs), \
  31                        $(if $($(m)-objs)$($(m)-cxxobjs)$($(m)-sharedobjs),,$(m)))
  32
  33# C executables linked based on several .o files
  34host-cmulti     := $(foreach m,$(__hostprogs),\
  35                   $(if $($(m)-cxxobjs),,$(if $($(m)-objs),$(m))))
  36
  37# Shared object libraries
  38host-shared     := $(foreach m,$(__hostprogs),\
  39                   $(if $($(m)-sharedobjs),$(m))))
  40
  41# Object (.o) files compiled from .c files
  42host-cobjs      := $(sort $(foreach m,$(__hostprogs),$($(m)-objs)))
  43
  44# C++ code
  45# C++ executables compiled from at least one .cc file
  46# and zero or more .c files
  47host-cxxmulti   := $(foreach m,$(__hostprogs),$(if $($(m)-cxxobjs),$(m)))
  48
  49# C++ Object (.o) files compiled from .cc files
  50host-cxxobjs    := $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs)))
  51
  52# Object (.o) files used by the shared libaries
  53host-cshobjs    := $(sort $(foreach m,$(host-cshlib),$($(m:.so=-objs))))
  54host-cxxshobjs  := $(sort $(foreach m,$(host-cxxshlib),$($(m:.so=-objs))))
  55
  56host-csingle    := $(addprefix $(obj)/,$(host-csingle))
  57host-cmulti     := $(addprefix $(obj)/,$(host-cmulti))
  58host-cobjs      := $(addprefix $(obj)/,$(host-cobjs))
  59host-cxxmulti   := $(addprefix $(obj)/,$(host-cxxmulti))
  60host-cxxobjs    := $(addprefix $(obj)/,$(host-cxxobjs))
  61host-cshlib     := $(addprefix $(obj)/,$(host-cshlib))
  62host-cxxshlib   := $(addprefix $(obj)/,$(host-cxxshlib))
  63host-cshobjs    := $(addprefix $(obj)/,$(host-cshobjs))
  64host-cxxshobjs  := $(addprefix $(obj)/,$(host-cxxshobjs))
  65host-shared     := $(addprefix $(obj)/,$(host-shared))
  66
  67#####
  68# Handle options to gcc. Support building with separate output directory
  69
  70_hostc_flags   = $(KBUILD_HOSTCFLAGS)   $(HOST_EXTRACFLAGS)   \
  71                 $(HOSTCFLAGS_$(basetarget).o)
  72_hostcxx_flags = $(KBUILD_HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \
  73                 $(HOSTCXXFLAGS_$(basetarget).o)
  74
  75ifeq ($(KBUILD_SRC),)
  76__hostc_flags   = $(_hostc_flags)
  77__hostcxx_flags = $(_hostcxx_flags)
  78else
  79__hostc_flags   = -I$(obj) $(call flags,_hostc_flags)
  80__hostcxx_flags = -I$(obj) $(call flags,_hostcxx_flags)
  81endif
  82
  83hostc_flags    = -Wp,-MD,$(depfile) $(__hostc_flags)
  84hostcxx_flags  = -Wp,-MD,$(depfile) $(__hostcxx_flags)
  85
  86#####
  87# Compile programs on the host
  88
  89# Create executable from a single .c file
  90# host-csingle -> Executable
  91quiet_cmd_host-csingle  = HOSTCC  $@
  92      cmd_host-csingle  = $(HOSTCC) $(hostc_flags) -o $@ $< \
  93                $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(@F))
  94$(host-csingle): $(obj)/%: $(src)/%.c FORCE
  95        $(call if_changed_dep,host-csingle)
  96
  97# Link an executable based on list of .o files, all plain c
  98# host-cmulti -> executable
  99quiet_cmd_host-cmulti   = HOSTLD  $@
 100      cmd_host-cmulti   = $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -o $@ \
 101                          $(addprefix $(obj)/,$($(@F)-objs)) \
 102                          $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(@F))
 103$(host-cmulti): FORCE
 104        $(call if_changed,host-cmulti)
 105$(call multi_depend, $(host-cmulti), , -objs)
 106
 107# Create .o file from a single .c file
 108# host-cobjs -> .o
 109quiet_cmd_host-cobjs    = HOSTCC  $@
 110      cmd_host-cobjs    = $(HOSTCC) $(hostc_flags) -c -o $@ $<
 111$(host-cobjs): $(obj)/%.o: $(src)/%.c FORCE
 112        $(call if_changed_dep,host-cobjs)
 113
 114# Link an executable based on list of .o files, a mixture of .c and .cc
 115# host-cxxmulti -> executable
 116quiet_cmd_host-cxxmulti = HOSTLD  $@
 117      cmd_host-cxxmulti = $(HOSTCXX) $(KBUILD_HOSTLDFLAGS) -o $@ \
 118                          $(foreach o,objs cxxobjs,\
 119                          $(addprefix $(obj)/,$($(@F)-$(o)))) \
 120                          $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(@F))
 121$(host-cxxmulti): FORCE
 122        $(call if_changed,host-cxxmulti)
 123$(call multi_depend, $(host-cxxmulti), , -objs -cxxobjs)
 124
 125# Create .o file from a single .cc (C++) file
 126quiet_cmd_host-cxxobjs  = HOSTCXX $@
 127      cmd_host-cxxobjs  = $(HOSTCXX) $(hostcxx_flags) -c -o $@ $<
 128$(host-cxxobjs): $(obj)/%.o: $(src)/%.cc FORCE
 129        $(call if_changed_dep,host-cxxobjs)
 130
 131# Compile .c file, create position independent .o file
 132# host-cshobjs -> .o
 133quiet_cmd_host-cshobjs  = HOSTCC  -fPIC $@
 134      cmd_host-cshobjs  = $(HOSTCC) $(hostc_flags) -fPIC -c -o $@ $<
 135$(host-cshobjs): $(obj)/%.o: $(src)/%.c FORCE
 136        $(call if_changed_dep,host-cshobjs)
 137
 138# Compile .c file, create position independent .o file
 139# Note that plugin capable gcc versions can be either C or C++ based
 140# therefore plugin source files have to be compilable in both C and C++ mode.
 141# This is why a C++ compiler is invoked on a .c file.
 142# host-cxxshobjs -> .o
 143quiet_cmd_host-cxxshobjs        = HOSTCXX -fPIC $@
 144      cmd_host-cxxshobjs        = $(HOSTCXX) $(hostcxx_flags) -fPIC -c -o $@ $<
 145$(host-cxxshobjs): $(obj)/%.o: $(src)/%.c FORCE
 146        $(call if_changed_dep,host-cxxshobjs)
 147
 148# Link a shared library, based on position independent .o files
 149# *.o -> .so shared library (host-cshlib)
 150quiet_cmd_host-cshlib   = HOSTLLD -shared $@
 151      cmd_host-cshlib   = $(HOSTCC) $(HOSTLDFLAGS) -shared -o $@ \
 152                          $(addprefix $(obj)/,$($(@F:.so=-objs))) \
 153                          $(HOST_LOADLIBES) $(HOSTLDLIBS_$(@F))
 154$(host-cshlib): FORCE
 155        $(call if_changed,host-cshlib)
 156$(call multi_depend, $(host-cshlib), .so, -objs)
 157
 158# Link a shared library, based on position independent .o files
 159# *.o -> .so shared library (host-cxxshlib)
 160quiet_cmd_host-cxxshlib = HOSTLLD -shared $@
 161      cmd_host-cxxshlib = $(HOSTCXX) $(HOSTLDFLAGS) -shared -o $@ \
 162                          $(addprefix $(obj)/,$($(@F:.so=-objs))) \
 163                          $(HOST_LOADLIBES) $(HOSTLDLIBS_$(@F))
 164$(host-cxxshlib): FORCE
 165        $(call if_changed,host-cxxshlib)
 166$(call multi_depend, $(host-cxxshlib), .so, -objs)
 167
 168targets += $(host-csingle)  $(host-cmulti) $(host-cobjs)\
 169           $(host-cxxmulti) $(host-cxxobjs) $(host-shared) \
 170           $(host-cshlib) $(host-cshobjs) $(host-cxxshlib) $(host-cxxshobjs)
 171