buildlib/library.mak

   1 # -*- make -*-
   2
   3 # This creates a shared library.
   4
   5 # Input
   6 # $(SOURCE) - The source code to use
   7 # $(HEADERS) - Exported header files and private header files
   8 # $(LIBRARY) - The name of the library without lib or .so
   9 # $(MAJOR) - The major version number of this library
  10 # $(MINOR) - The minor version number of this library
  11
  12 # All output is writtin to .opic files in the build directory to
  13 # signify the PIC output.
  14
  15 # See defaults.mak for information about LOCAL
  16
  17 # Some local definitions
  18 LOCAL := lib$(LIBRARY).so.$(MAJOR).$(MINOR)
  19 $(LOCAL)-OBJS := $(addprefix $(OBJ)/,$(addsuffix .opic,$(notdir $(basename $(SOURCE)))))
  20 $(LOCAL)-DEP := $(addprefix $(DEP)/,$(addsuffix .d,$(notdir $(basename $(SOURCE)))))
  21 $(LOCAL)-HEADERS := $(addprefix $(INCLUDE)/,$(HEADERS))
  22 $(LOCAL)-SONAME := lib$(LIBRARY).so.$(MAJOR)
  23
  24 # Install the command hooks
  25 headers: $($(LOCAL)-HEADERS)
  26 library: $(LIB)/lib$(LIBRARY).so $(LIB)/lib$(LIBRARY).so.$(MAJOR)
  27 clean: clean/$(LOCAL)
  28 veryclean: veryclean/$(LOCAL)
  29
  30 # The clean rules
  31 .PHONY: clean/$(LOCAL) veryclean/$(LOCAL)
  32 clean/$(LOCAL):
  33         -rm -f $($(@F)-OBJS) $($(@F)-DEP)
  34 veryclean/$(LOCAL): clean/$(LOCAL)
  35         -rm -f $($(@F)-HEADERS) $(LIB)/lib$(LIBRARY).so*
  36
  37 # Build rules for the two symlinks
  38 .PHONY: $(LIB)/lib$(LIBRARY).so.$(MAJOR) $(LIB)/lib$(LIBRARY).so
  39 $(LIB)/lib$(LIBRARY).so.$(MAJOR): $(LIB)/lib$(LIBRARY).so.$(MAJOR).$(MINOR)
  40         ln -sf $(<F) $@
  41 $(LIB)/lib$(LIBRARY).so: $(LIB)/lib$(LIBRARY).so.$(MAJOR).$(MINOR)
  42         ln -sf $(<F) $@
  43
  44 # The binary build rule
  45 $(LIB)/lib$(LIBRARY).so.$(MAJOR).$(MINOR): $($(LOCAL)-HEADERS) $($(LOCAL)-OBJS)
  46         echo Building shared library $@
  47         $(CXX) $(CXXFLAGS) $(LDFLAGS) $(PICFLAGS) $(LFLAGS) -o $@ \
  48            -Wl,-soname -Wl,$($(@F)-SONAME) -shared $(filter %.opic,$^)
  49
  50 # Compilation rules
  51 vpath %.cc $(SUBDIRS)
  52 $(OBJ)/%.opic: %.cc
  53         echo Compiling $< to $@
  54         $(CXX) -c $(INLINEDEPFLAG) $(CPPFLAGS) $(CXXFLAGS) $(PICFLAGS) -o $@ $<
  55         $(DoDep)
  56
  57 # Include the dependencies that are available
  58 The_DFiles = $(wildcard $($(LOCAL)-DEP))
  59 ifneq ($(words $(The_DFiles)),0)
  60 include $(The_DFiles)
  61 endif