Makefile.host 4.7 KB

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  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. # SPDX-License-Identifier: GPL-2.0
  24. #
  25. __hostprogs := $(sort $(hostprogs-y) $(hostprogs-m))
  26. # C code
  27. # Executables compiled from a single .c file
  28. host-csingle := $(foreach m,$(__hostprogs), \
  29. $(if $($(m)-objs)$($(m)-cxxobjs)$($(m)-sharedobjs),,$(m)))
  30. # C executables linked based on several .o files
  31. host-cmulti := $(foreach m,$(__hostprogs),\
  32. $(if $($(m)-cxxobjs),,$(if $($(m)-objs),$(m))))
  33. # Shared object libraries
  34. host-shared := $(foreach m,$(__hostprogs),\
  35. $(if $($(m)-sharedobjs),$(m))))
  36. # Object (.o) files compiled from .c files
  37. host-cobjs := $(sort $(foreach m,$(__hostprogs),$($(m)-objs)))
  38. # C++ code
  39. # C++ executables compiled from at least one .cc file
  40. # and zero or more .c files
  41. host-cxxmulti := $(foreach m,$(__hostprogs),$(if $($(m)-cxxobjs),$(m)))
  42. # C++ Object (.o) files compiled from .cc files
  43. host-cxxobjs := $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs)))
  44. # output directory for programs/.o files
  45. # hostprogs-y := tools/build may have been specified.
  46. # Retrieve also directory of .o files from prog-objs or prog-cxxobjs notation
  47. host-objdirs := $(dir $(__hostprogs) $(host-cobjs) $(host-cxxobjs))
  48. host-objdirs := $(strip $(sort $(filter-out ./,$(host-objdirs))))
  49. __hostprogs := $(addprefix $(obj)/,$(__hostprogs))
  50. host-csingle := $(addprefix $(obj)/,$(host-csingle))
  51. host-cmulti := $(addprefix $(obj)/,$(host-cmulti))
  52. host-cobjs := $(addprefix $(obj)/,$(host-cobjs))
  53. host-cxxmulti := $(addprefix $(obj)/,$(host-cxxmulti))
  54. host-cxxobjs := $(addprefix $(obj)/,$(host-cxxobjs))
  55. host-shared := $(addprefix $(obj)/,$(host-shared))
  56. host-objdirs := $(addprefix $(obj)/,$(host-objdirs))
  57. obj-dirs += $(host-objdirs)
  58. #####
  59. # Handle options to gcc. Support building with separate output directory
  60. _hostc_flags = $(HOSTCFLAGS) $(HOST_EXTRACFLAGS) \
  61. $(HOSTCFLAGS_$(basetarget).o)
  62. _hostcxx_flags = $(HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \
  63. $(HOSTCXXFLAGS_$(basetarget).o)
  64. ifeq ($(KBUILD_SRC),)
  65. __hostc_flags = $(_hostc_flags)
  66. __hostcxx_flags = $(_hostcxx_flags)
  67. else
  68. __hostc_flags = -I$(obj) $(call flags,_hostc_flags)
  69. __hostcxx_flags = -I$(obj) $(call flags,_hostcxx_flags)
  70. endif
  71. hostc_flags = -Wp,-MD,$(depfile) $(__hostc_flags)
  72. hostcxx_flags = -Wp,-MD,$(depfile) $(__hostcxx_flags)
  73. #####
  74. # Compile programs on the host
  75. # Create executable from a single .c file
  76. # host-csingle -> Executable
  77. quiet_cmd_host-csingle = HOSTCC $@
  78. cmd_host-csingle = $(HOSTCC) $(hostc_flags) -o $@ $< \
  79. $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
  80. $(host-csingle): $(obj)/%: $(src)/%.c FORCE
  81. $(call if_changed_dep,host-csingle)
  82. # Link an executable based on list of .o files, all plain c
  83. # host-cmulti -> executable
  84. quiet_cmd_host-cmulti = HOSTLD $@
  85. cmd_host-cmulti = $(HOSTCC) $(HOSTLDFLAGS) -o $@ \
  86. $(addprefix $(obj)/,$($(@F)-objs)) \
  87. $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
  88. $(host-cmulti): FORCE
  89. $(call if_changed,host-cmulti)
  90. $(call multi_depend, $(host-cmulti), , -objs)
  91. # Create .o file from a single .c file
  92. # host-cobjs -> .o
  93. quiet_cmd_host-cobjs = HOSTCC $@
  94. cmd_host-cobjs = $(HOSTCC) $(hostc_flags) -c -o $@ $<
  95. $(host-cobjs): $(obj)/%.o: $(src)/%.c FORCE
  96. $(call if_changed_dep,host-cobjs)
  97. # Link an executable based on list of .o files, a mixture of .c and .cc
  98. # host-cxxmulti -> executable
  99. quiet_cmd_host-cxxmulti = HOSTLD $@
  100. cmd_host-cxxmulti = $(HOSTCXX) $(HOSTLDFLAGS) -o $@ \
  101. $(foreach o,objs cxxobjs,\
  102. $(addprefix $(obj)/,$($(@F)-$(o)))) \
  103. $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
  104. $(host-cxxmulti): FORCE
  105. $(call if_changed,host-cxxmulti)
  106. $(call multi_depend, $(host-cxxmulti), , -objs -cxxobjs)
  107. # Create .o file from a single .cc (C++) file
  108. quiet_cmd_host-cxxobjs = HOSTCXX $@
  109. cmd_host-cxxobjs = $(HOSTCXX) $(hostcxx_flags) -c -o $@ $<
  110. $(host-cxxobjs): $(obj)/%.o: $(src)/%.cc FORCE
  111. $(call if_changed_dep,host-cxxobjs)
  112. targets += $(host-csingle) $(host-cmulti) $(host-cobjs)\
  113. $(host-cxxmulti) $(host-cxxobjs) $(host-shared)