Makefile.host 5.8 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++ is supported, but preferred language is C for such utilities.
  7. #
  8. # Samle syntax (see Documentation/kbuild/makefile.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. # hostprogs-y := conf
  23. # conf-objs := conf.o libkconfig.so
  24. # libkconfig-objs := expr.o type.o
  25. # Will create a shared library named libkconfig.so that consist of
  26. # expr.o and type.o (they are both compiled as C code and the object file
  27. # are made as position independent code).
  28. # conf.c is compiled as a c program, and conf.o is linked together with
  29. # libkconfig.so as the executable conf.
  30. # Note: Shared libraries consisting of C++ files are not supported
  31. __hostprogs := $(sort $(hostprogs-y)$(hostprogs-m))
  32. # hostprogs-y := tools/build may have been specified. Retreive directory
  33. obj-dirs += $(foreach f,$(__hostprogs), $(if $(dir $(f)),$(dir $(f))))
  34. obj-dirs := $(strip $(sort $(filter-out ./,$(obj-dirs))))
  35. # C code
  36. # Executables compiled from a single .c file
  37. host-csingle := $(foreach m,$(__hostprogs),$(if $($(m)-objs),,$(m)))
  38. # C executables linked based on several .o files
  39. host-cmulti := $(foreach m,$(__hostprogs),\
  40. $(if $($(m)-cxxobjs),,$(if $($(m)-objs),$(m))))
  41. # Object (.o) files compiled from .c files
  42. host-cobjs := $(sort $(foreach m,$(__hostprogs),$($(m)-objs)))
  43. # C++ code
  44. # C++ executables compiled from at least on .cc file
  45. # and zero or more .c files
  46. host-cxxmulti := $(foreach m,$(__hostprogs),$(if $($(m)-cxxobjs),$(m)))
  47. # C++ Object (.o) files compiled from .cc files
  48. host-cxxobjs := $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs)))
  49. # Shared libaries (only .c supported)
  50. # Shared libraries (.so) - all .so files referenced in "xxx-objs"
  51. host-cshlib := $(sort $(filter %.so, $(host-cobjs)))
  52. # Remove .so files from "xxx-objs"
  53. host-cobjs := $(filter-out %.so,$(host-cobjs))
  54. #Object (.o) files used by the shared libaries
  55. host-cshobjs := $(sort $(foreach m,$(host-cshlib),$($(m:.so=-objs))))
  56. __hostprogs := $(addprefix $(obj)/,$(__hostprogs))
  57. host-csingle := $(addprefix $(obj)/,$(host-csingle))
  58. host-cmulti := $(addprefix $(obj)/,$(host-cmulti))
  59. host-cobjs := $(addprefix $(obj)/,$(host-cobjs))
  60. host-cxxmulti := $(addprefix $(obj)/,$(host-cxxmulti))
  61. host-cxxobjs := $(addprefix $(obj)/,$(host-cxxobjs))
  62. host-cshlib := $(addprefix $(obj)/,$(host-cshlib))
  63. host-cshobjs := $(addprefix $(obj)/,$(host-cshobjs))
  64. obj-dirs := $(addprefix $(obj)/,$(obj-dirs))
  65. #####
  66. # Handle options to gcc. Support building with separate output directory
  67. _hostc_flags = $(HOSTCFLAGS) $(HOST_EXTRACFLAGS) $(HOSTCFLAGS_$(*F).o)
  68. _hostcxx_flags = $(HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) $(HOSTCXXFLAGS_$(*F).o)
  69. ifeq ($(KBUILD_SRC),)
  70. __hostc_flags = $(_hostc_flags)
  71. __hostcxx_flags = $(_hostcxx_flags)
  72. else
  73. __hostc_flags = -I$(obj) $(call flags,_hostc_flags)
  74. __hostcxx_flags = -I$(obj) $(call flags,_hostcxx_flags)
  75. endif
  76. hostc_flags = -Wp,-MD,$(depfile) $(__hostc_flags)
  77. hostcxx_flags = -Wp,-MD,$(depfile) $(__hostcxx_flags)
  78. #####
  79. # Compile programs on the host
  80. # Create executable from a single .c file
  81. # host-csingle -> Executable
  82. quiet_cmd_host-csingle = HOSTCC $@
  83. cmd_host-csingle = $(HOSTCC) $(hostc_flags) -o $@ $< \
  84. $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
  85. $(host-csingle): %: %.c FORCE
  86. $(call if_changed_dep,host-csingle)
  87. # Link an executable based on list of .o files, all plain c
  88. # host-cmulti -> executable
  89. quiet_cmd_host-cmulti = HOSTLD $@
  90. cmd_host-cmulti = $(HOSTCC) $(HOSTLDFLAGS) -o $@ \
  91. $(addprefix $(obj)/,$($(@F)-objs)) \
  92. $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
  93. $(host-cmulti): %: $(host-cobjs) $(host-cshlib) FORCE
  94. $(call if_changed,host-cmulti)
  95. # Create .o file from a single .c file
  96. # host-cobjs -> .o
  97. quiet_cmd_host-cobjs = HOSTCC $@
  98. cmd_host-cobjs = $(HOSTCC) $(hostc_flags) -c -o $@ $<
  99. $(host-cobjs): %.o: %.c FORCE
  100. $(call if_changed_dep,host-cobjs)
  101. # Link an executable based on list of .o files, a mixture of .c and .cc
  102. # host-cxxmulti -> executable
  103. quiet_cmd_host-cxxmulti = HOSTLD $@
  104. cmd_host-cxxmulti = $(HOSTCXX) $(HOSTLDFLAGS) -o $@ \
  105. $(foreach o,objs cxxobjs,\
  106. $(addprefix $(obj)/,$($(@F)-$(o)))) \
  107. $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
  108. $(host-cxxmulti): %: $(host-cobjs) $(host-cxxobjs) $(host-cshlib) FORCE
  109. $(call if_changed,host-cxxmulti)
  110. # Create .o file from a single .cc (C++) file
  111. quiet_cmd_host-cxxobjs = HOSTCXX $@
  112. cmd_host-cxxobjs = $(HOSTCXX) $(hostcxx_flags) -c -o $@ $<
  113. $(host-cxxobjs): %.o: %.cc FORCE
  114. $(call if_changed_dep,host-cxxobjs)
  115. # Compile .c file, create position independent .o file
  116. # host-cshobjs -> .o
  117. quiet_cmd_host-cshobjs = HOSTCC -fPIC $@
  118. cmd_host-cshobjs = $(HOSTCC) $(hostc_flags) -fPIC -c -o $@ $<
  119. $(host-cshobjs): %.o: %.c FORCE
  120. $(call if_changed_dep,host-cshobjs)
  121. # Link a shared library, based on position independent .o files
  122. # *.o -> .so shared library (host-cshlib)
  123. quiet_cmd_host-cshlib = HOSTLLD -shared $@
  124. cmd_host-cshlib = $(HOSTCC) $(HOSTLDFLAGS) -shared -o $@ \
  125. $(addprefix $(obj)/,$($(@F:.so=-objs))) \
  126. $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
  127. $(host-cshlib): %: $(host-cshobjs) FORCE
  128. $(call if_changed,host-cshlib)
  129. targets += $(host-csingle) $(host-cmulti) $(host-cobjs)\
  130. $(host-cxxmulti) $(host-cxxobjs) $(host-cshlib) $(host-cshobjs)