Makefile

   1 # Modules, each containing:
   2 #  * $(MODULE)/Make.inc -- makefile include
   3 #  * $(MODULE)/$(MODULE).h -- minimal "interface" header file
   4 #  * $(MODULE)/$(MODULE).ih -- internal/implementation header file
   5 #    (only to be included by sources within the module)
   6 #  * $(MODULE)/*.cc -- module source files
   7 MODULES := main reader store alien typeregister textmodel fold typepath
   8
   9 CXXFLAGS = -I.
  10 CXX = g++
  11
  12 # Variables for the modules to write to
  13 SRCS :=
  14
  15 # Include module definitions
  16 include $(patsubst %,%/Make.inc,$(MODULES))
  17
  18 # This rule just links the object files together
  19 odcread: $(SRCS:.cc=.o)
  20         $(CXX) -liconv -o $@ $^
  21
  22 # This rule build an object (.o) from a source (.cc).
  23 %.o: %.cc
  24         $(CXX) $(CXXFLAGS) $< -c -o $@
  25
  26 # For each implementation header (.ih) generate a dependency (.d) file which
  27 # will ensure that the compiled header (.ih.gch) is rebuilt whenever the header
  28 # files included by the .ih are updated.
  29 # The options given to GCC for this are as follows:
  30 #  -MM : calculate dependencies, but exclude system headers
  31 #  -MF : output dependencies to the given file
  32 #  -MP : generate "header.h:" rules to avoid errors on deletion of headers
  33 #  -MT : the main rule has the given target (to handle subdirs correctly)
  34 # The .d file is not an explicit target because it will need to be (re-)built
  35 # if and only if the .ih.gch needs to be rebuilt.
  36 %.ih.gch: %.ih
  37         $(CXX) $(CXXFLAGS) -x c++-header $< -MM -MF $*.d -MP -MT $@
  38         $(CXX) $(CXXFLAGS) -x c++-header $< -o $@
  39
  40 # Each module has a .ih file that should be *the only* include from the .cc
  41 # files. These .ih files are pre-compiled to .ih.gch, and dependency caching
  42 # is based on the .ih files, not the .cc files.
  43 define depend_on_compiled_header
  44 $(patsubst %.cc,%.o,$(1)) : $(dir $(1))module.ih.gch
  45 endef
  46 $(foreach src,$(SRCS),$(eval $(call depend_on_compiled_header,$(src))))
  47
  48 clean:
  49         rm -f */*.o */module.d */module.ih.gch
  50
  51 dist-clean: clean
  52         rm -f odcread
  53 # Include the generated dependency files (if they exist)
  54 -include $(patsubst %,%/module.d,$(MODULES))