config/makefiles/xpidl/Makefile.in

   1 # This Source Code Form is subject to the terms of the Mozilla Public
   2 # License, v. 2.0. If a copy of the MPL was not distributed with this
   3 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
   4
   5 STANDALONE_MAKEFILE := 1
   6
   7 include $(topsrcdir)/config/rules.mk
   8
   9 # Building XPIDLs effectively consists of two steps:
  10 #
  11 #   1) Staging all .idl files to a common directory.
  12 #   2) Doing everything with the .idl files.
  13 #
  14 # Each .idl file is processed into a .h file and typelib information.
  15 # The .h file shares the same stem as the input file and is installed
  16 # in the common headers include directory.
  17 #
  18 # XPIDL files are logically grouped together by modules. The typelib
  19 # information for all XPIDLs in the same module is linked together into
  20 # an .xpt file having the name of the module.
  21 #
  22 # As an optimization to reduce overall CPU usage, we process all .idl
  23 # belonging to a module with a single command invocation. This prevents
  24 # redundant parsing of .idl files and significantly reduces CPU cycles.
  25
  26 # For dependency files.
  27 idl_deps_dir := .deps
  28
  29 dist_idl_dir := $(DIST)/idl
  30 dist_include_dir := $(DIST)/include
  31 dist_xpcrs_dir := $(DIST)/xpcrs
  32 stub_file := xptdata.stub
  33 process_py := $(topsrcdir)/python/mozbuild/mozbuild/action/xpidl-process.py
  34 target_file := $(topobjdir)/xpcom/reflect/xptinfo/xptdata.cpp
  35 xptdata_h := $(dist_include_dir)/xptdata.h
  36 generated_files := $(target_file) $(xptdata_h)
  37 code_gen_py := $(topsrcdir)/xpcom/reflect/xptinfo/xptcodegen.py
  38 code_gen_deps := $(topsrcdir)/xpcom/ds/tools/perfecthash.py
  39
  40 # TODO we should use py_action, but that would require extra directories to be
  41 # in the virtualenv.
  42 %.xpt:
  43         $(REPORT_BUILD)
  44         $(PYTHON3) $(process_py) --depsdir $(idl_deps_dir) \
  45                 --bindings-conf $(topsrcdir)/dom/bindings/Bindings.conf \
  46                 $(foreach dir,$(all_idl_dirs),-I $(dir)) \
  47                 $(dist_include_dir) $(dist_xpcrs_dir) $(@D) \
  48                 $(basename $(notdir $@)) $($(basename $(notdir $@))_deps)
  49 # When some IDL is added or removed, if the actual IDL file was already, or
  50 # still is, in the tree, simple dependencies can't detect that the XPT needs
  51 # to be rebuilt.
  52 # Add the current value of $($(xpidl_module)_deps) in the depend file, such that
  53 # we can later check if the value has changed since last build, which will
  54 # indicate whether IDLs were added or removed.
  55 # Note that removing previously built files is not covered.
  56         @echo $(basename $(notdir $@))_deps_built = $($(basename $(notdir $@))_deps) >> $(idl_deps_dir)/$(basename $(notdir $@)).pp
  57
  58 xpidl_modules := @xpidl_modules@
  59 xpt_files := $(addsuffix .xpt,$(xpidl_modules))
  60
  61 @xpidl_rules@
  62
  63 depends_files := $(foreach root,$(xpidl_modules),$(idl_deps_dir)/$(root).pp)
  64
  65 ifdef COMPILE_ENVIRONMENT
  66 xpidl:: $(generated_files)
  67 endif
  68
  69 # See bug 1420119 for why we need the semicolon.
  70 $(target_file) $(xptdata_h) : $(stub_file) ;
  71
  72 $(xpt_files): $(process_py) $(call mkdir_deps,$(idl_deps_dir) $(dist_include_dir) $(dist_xpcrs_dir))
  73
  74 $(stub_file) : $(xpt_files) $(code_gen_py) $(code_gen_deps)
  75         $(REPORT_BUILD)
  76         $(PYTHON3) $(code_gen_py) $(generated_files) $(xpt_files)
  77         @touch $@
  78
  79 -include $(depends_files)
  80
  81 define xpt_deps
  82 $(1): $(call mkdir_deps,$(dir $(1)))
  83 ifneq ($($(basename $(notdir $(1)))_deps),$($(basename $(notdir $(1)))_deps_built))
  84 $(1): FORCE
  85 endif
  86 endef
  87
  88 $(foreach xpt,$(xpt_files),$(eval $(call xpt_deps,$(xpt))))
  89
  90 .PHONY: xpidl