Makefile for library building. Automatic header linking.

Makefile

# Definitions for header autolinking
DEPDIR := .d
$(shell mkdir -p $(DEPDIR) >/dev/null)
DEPFLAGS = -MT $@ -MMD -MP -MF $(DEPDIR)/$*.Td

COMPILE.c = $(CC) $(DEPFLAGS) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c
COMPILE.cc = $(CXX) $(DEPFLAGS) $(CXXFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c
POSTCOMPILE = @mv -f $(DEPDIR)/$*.Td $(DEPDIR)/$*.d && touch $@

# Main part
MKDIR = mkdir -p
RMDIR = rm -rf

program_NAME := blackswan

program_RELEASE_DIR := release
program_DEBUG_DIR := debug

program_CPP := $(program_NAME).cpp
program_OBJ := $(program_NAME).o

program_LIBSRC_DIR := src
program_LIB_DIR := lib

program_LIBSRC_PATHS := $(patsubst %/,%,$(sort $(dir $(wildcard $(program_LIBSRC_DIR)/*/))))
program_LIBNAMES := $(patsubst $(program_LIBSRC_DIR)/%,%,$(program_LIBSRC_PATHS))

program_LIBSRCS := $(foreach libpath,$(program_LIBSRC_PATHS),$(wildcard $(libpath)/*.cpp))
program_LIBOBJS := $(patsubst $(program_LIBSRC_DIR)/%,$(program_LIB_DIR)/%,$(patsubst %.cpp,%.o,$(program_LIBSRCS))) 

program_INC_DIRS := include

SRCS := $(program_LIBSRCS) $(program_CPP)

CPPFLAGS += $(foreach includedir,$(program_INC_DIRS),-I$(includedir))
LDFLAGS += $(foreach librarydir,$(program_LIB_DIR),-L$(librarydir)) 

.PHONY: debug release libs $(program_LIBNAMES) release_lib clean wipe

debug: $(program_DEBUG_DIR)/$(program_NAME)

$(program_DEBUG_DIR)/$(program_NAME): $(program_LIBOBJS) $(program_DEBUG_DIR)/$(program_OBJ)
	$(LINK.cc) $(program_LIBOBJS) $(program_DEBUG_DIR)/$(program_OBJ) -o $@

$(program_DEBUG_DIR)/$(program_OBJ): $(program_DEBUG_DIR)/%.o : $(program_CPP) $(DEPDIR)/%.d
	$(MKDIR) $(@D)
	$(MKDIR) $(DEPDIR)/$(*D)
	$(COMPILE.cc) -o $@ $<
	$(POSTCOMPILE)

$(program_LIBOBJS): $(program_LIB_DIR)/%.o : $(program_LIBSRC_DIR)/%.cpp $(DEPDIR)/%.d
	$(MKDIR) $(@D)
	$(MKDIR) $(DEPDIR)/$(*D)
	$(COMPILE.cc) -fPIC $< -o $@
	$(POSTCOMPILE)

.SECONDEXPANSION:
$(program_LIBNAMES): $$(patsubst $(program_LIBSRC_DIR)/%,$(program_LIB_DIR)/%,$$(patsubst %.cpp,%.o,$$(wildcard $(program_LIBSRC_DIR)/$$@/*.cpp)))

libs: $(program_LIBNAMES)

release_lib: $(program_LIB_DIR)/lib$(program_NAME).so

$(program_LIB_DIR)/lib$(program_NAME).so: $(program_LIBOBJS)
	$(MKDIR) $(@D)
	$(LINK.cc) -shared -Wl,-soname,lib$(program_NAME).so -o $@ $(program_LIBOBJS)

release: $(program_RELEASE_DIR)/$(program_NAME)

$(program_RELEASE_DIR)/$(program_OBJ): $(program_RELEASE_DIR)/%.o: $(program_CPP) $(DEPDIR)/%.d
	$(MKDIR) $(@D)
	$(MKDIR) $(*D)
	$(COMPILE.cc) -o $@ $(program_CPP)
	$(POSTCOMPILE)

$(program_RELEASE_DIR)/$(program_NAME): $(program_LIB_DIR)/lib$(program_NAME).so $(program_RELEASE_DIR)/$(program_OBJ)
	$(LINK.cc) -o $@ -l$(program_NAME) $(program_RELEASE_DIR)/$(program_OBJ)
	
wipe: clean
	$(RMDIR) $(program_RELEASE_DIR)
	$(RMDIR) $(program_DEBUG_DIR)
	$(RM) $(program_LIB_DIR)/lib$(program_NAME).so

clean:
	$(RM) $(program_LIBOBJS)
	$(RMDIR) $(sort $(dir $(program_LIBOBJS)))
	$(RM) $(program_OBJ)
	$(RMDIR) $(DEPDIR)

$(DEPDIR)/%.d:; 
.PRECIOUS: $(DEPDIR)/%.d

include $(wildcard $(patsubst %,$(DEPDIR)/%.d,$(basename $(SRCS))))