Makefile.host 6.4 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. # C code
  33. # Executables compiled from a single .c file
  34. host-csingle := $(foreach m,$(__hostprogs),$(if $($(m)-objs),,$(m)))
  35. # C executables linked based on several .o files
  36. host-cmulti := $(foreach m,$(__hostprogs),\
  37. $(if $($(m)-cxxobjs),,$(if $($(m)-objs),$(m))))
  38. # Object (.o) files compiled from .c files
  39. host-cobjs := $(sort $(foreach m,$(__hostprogs),$($(m)-objs)))
  40. # C++ code
  41. # C++ executables compiled from at least on .cc file
  42. # and zero or more .c files
  43. host-cxxmulti := $(foreach m,$(__hostprogs),$(if $($(m)-cxxobjs),$(m)))
  44. # C++ Object (.o) files compiled from .cc files
  45. host-cxxobjs := $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs)))
  46. # Shared libaries (only .c supported)
  47. # Shared libraries (.so) - all .so files referenced in "xxx-objs"
  48. host-cshlib := $(sort $(filter %.so, $(host-cobjs)))
  49. # Remove .so files from "xxx-objs"
  50. host-cobjs := $(filter-out %.so,$(host-cobjs))
  51. #Object (.o) files used by the shared libaries
  52. host-cshobjs := $(sort $(foreach m,$(host-cshlib),$($(m:.so=-objs))))
  53. # output directory for programs/.o files
  54. # hostprogs-y := tools/build may have been specified. Retreive directory
  55. host-objdirs := $(foreach f,$(__hostprogs), $(if $(dir $(f)),$(dir $(f))))
  56. # directory of .o files from prog-objs notation
  57. host-objdirs += $(foreach f,$(host-cmulti), \
  58. $(foreach m,$($(f)-objs), \
  59. $(if $(dir $(m)),$(dir $(m)))))
  60. # directory of .o files from prog-cxxobjs notation
  61. host-objdirs += $(foreach f,$(host-cxxmulti), \
  62. $(foreach m,$($(f)-cxxobjs), \
  63. $(if $(dir $(m)),$(dir $(m)))))
  64. host-objdirs := $(strip $(sort $(filter-out ./,$(host-objdirs))))
  65. __hostprogs := $(addprefix $(obj)/,$(__hostprogs))
  66. host-csingle := $(addprefix $(obj)/,$(host-csingle))
  67. host-cmulti := $(addprefix $(obj)/,$(host-cmulti))
  68. host-cobjs := $(addprefix $(obj)/,$(host-cobjs))
  69. host-cxxmulti := $(addprefix $(obj)/,$(host-cxxmulti))
  70. host-cxxobjs := $(addprefix $(obj)/,$(host-cxxobjs))
  71. host-cshlib := $(addprefix $(obj)/,$(host-cshlib))
  72. host-cshobjs := $(addprefix $(obj)/,$(host-cshobjs))
  73. host-objdirs := $(addprefix $(obj)/,$(host-objdirs))
  74. obj-dirs += $(host-objdirs)
  75. #####
  76. # Handle options to gcc. Support building with separate output directory
  77. _hostc_flags = $(HOSTCFLAGS) $(HOST_EXTRACFLAGS) \
  78. $(HOSTCFLAGS_$(basetarget).o)
  79. _hostcxx_flags = $(HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \
  80. $(HOSTCXXFLAGS_$(basetarget).o)
  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) $(call flags,_hostcxx_flags)
  87. endif
  88. hostc_flags = -Wp,-MD,$(depfile) $(__hostc_flags)
  89. hostcxx_flags = -Wp,-MD,$(depfile) $(__hostcxx_flags)
  90. #####
  91. # Compile programs on the host
  92. # Create executable from a single .c file
  93. # host-csingle -> Executable
  94. quiet_cmd_host-csingle = HOSTCC $@
  95. cmd_host-csingle = $(HOSTCC) $(hostc_flags) -o $@ $< \
  96. $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
  97. $(host-csingle): %: %.c FORCE
  98. $(call if_changed_dep,host-csingle)
  99. # Link an executable based on list of .o files, all plain c
  100. # host-cmulti -> executable
  101. quiet_cmd_host-cmulti = HOSTLD $@
  102. cmd_host-cmulti = $(HOSTCC) $(HOSTLDFLAGS) -o $@ \
  103. $(addprefix $(obj)/,$($(@F)-objs)) \
  104. $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
  105. $(host-cmulti): %: $(host-cobjs) $(host-cshlib) FORCE
  106. $(call if_changed,host-cmulti)
  107. # Create .o file from a single .c file
  108. # host-cobjs -> .o
  109. quiet_cmd_host-cobjs = HOSTCC $@
  110. cmd_host-cobjs = $(HOSTCC) $(hostc_flags) -c -o $@ $<
  111. $(host-cobjs): %.o: %.c FORCE
  112. $(call if_changed_dep,host-cobjs)
  113. # Link an executable based on list of .o files, a mixture of .c and .cc
  114. # host-cxxmulti -> executable
  115. quiet_cmd_host-cxxmulti = HOSTLD $@
  116. cmd_host-cxxmulti = $(HOSTCXX) $(HOSTLDFLAGS) -o $@ \
  117. $(foreach o,objs cxxobjs,\
  118. $(addprefix $(obj)/,$($(@F)-$(o)))) \
  119. $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
  120. $(host-cxxmulti): %: $(host-cobjs) $(host-cxxobjs) $(host-cshlib) FORCE
  121. $(call if_changed,host-cxxmulti)
  122. # Create .o file from a single .cc (C++) file
  123. quiet_cmd_host-cxxobjs = HOSTCXX $@
  124. cmd_host-cxxobjs = $(HOSTCXX) $(hostcxx_flags) -c -o $@ $<
  125. $(host-cxxobjs): %.o: %.cc FORCE
  126. $(call if_changed_dep,host-cxxobjs)
  127. # Compile .c file, create position independent .o file
  128. # host-cshobjs -> .o
  129. quiet_cmd_host-cshobjs = HOSTCC -fPIC $@
  130. cmd_host-cshobjs = $(HOSTCC) $(hostc_flags) -fPIC -c -o $@ $<
  131. $(host-cshobjs): %.o: %.c FORCE
  132. $(call if_changed_dep,host-cshobjs)
  133. # Link a shared library, based on position independent .o files
  134. # *.o -> .so shared library (host-cshlib)
  135. quiet_cmd_host-cshlib = HOSTLLD -shared $@
  136. cmd_host-cshlib = $(HOSTCC) $(HOSTLDFLAGS) -shared -o $@ \
  137. $(addprefix $(obj)/,$($(@F:.so=-objs))) \
  138. $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
  139. $(host-cshlib): %: $(host-cshobjs) FORCE
  140. $(call if_changed,host-cshlib)
  141. targets += $(host-csingle) $(host-cmulti) $(host-cobjs)\
  142. $(host-cxxmulti) $(host-cxxobjs) $(host-cshlib) $(host-cshobjs)