Makefile with out of source build Re: How to adding pathes to dependencies in rules of `.d` files

Updated. Suggestions are most welcome.

Thanks

---


# Makefile for top dir

# $(call makever,1.2.3)
# major.minor.patch
define makever
  $(MAKE) -C $@ [email protected].$(word 1,$(subst ., ,$(1)))

  @ cp $(OBJDIR)/$@/$@ $(OBJDIR)/$@/[email protected].$(1)

  @ cd $(OBJDIR)/$@; ln -f -s $(OBJDIR)/$@/[email protected].$(1) \
    $(OBJDIR)/$@/[email protected].$(word 1,$(subst ., ,$(1))); cd ..

  @ cd $(OBJDIR)/$@; ln -f -s $(OBJDIR)/$@/[email protected].$(1) \
    $(OBJDIR)/$@/[email protected]; cd ..
endef

# make # BUILD_DIR=build
ifndef BUILD_DIR
export OBJDIR = $(abspath build)
else
export OBJDIR = $(abspath $(BUILD_DIR))
endif

SUBDIRS = main foo

all : $(SUBDIRS)
install : $(SUBDIRS)

main : foo
main : ; $(MAKE) -C $@
foo : ; $(call makever,1.2.3)

# make DESTDIR=~/foo install
install :
  install -d "$(DESTDIR)/usr/local/bin"
  install -d "$(DESTDIR)/usr/local/lib"
  install -m 0755 $(OBJDIR)/main/main "$(DESTDIR)/usr/local/bin"
  install -m 0755 $(OBJDIR)/foo/*.so* "$(DESTDIR)/usr/local/lib"

clean : ; -rm -fr $(OBJDIR)

.PHONY : $(SUBDIRS) all install clean


---


# Makefile for subdir

# build shared library with -fPIC, -shared
CFLAGS    = # -g -O3 -fPIC # CXXFLAGS for .cpp
CPPFLAGS  = -MMD -MP -I../foo
LDFLAGS   = -L$(OBJDIR)/foo # -shared
LDLIBS    = -lfoo
#CC       = $(CXX) # link with CXX for .cpp

LDFLAGS  += -Wl,-rpath,$(OBJDIR)/foo
LDFLAGS  += -Wl,-rpath,'$$ORIGIN/../lib'
#LDFLAGS += -Wl,-soname,$(soname)

# make # NDEBUG=1
ifdef NDEBUG
CPPFLAGS += -DNDEBUG
CFLAGS   += -O3 # .cpp
else
CFLAGS   += -g # .cpp
LDFLAGS  += -fsanitize=address
endif

SUBDIR    = $(OBJDIR)/main

all : $(SUBDIR)/main # $(SUBDIR)/foo

$(SUBDIR)/main : $(SUBDIR)/$(patsubst %.c,%.o,$(wildcard *.c))
  $(CC) $(LDFLAGS) $^ $(LDLIBS) -o $@  # CXX for .cpp

$(SUBDIR)/%.o : %.c | $(SUBDIR)
  $(CC) $(CFLAGS) $(CPPFLAGS) -c -o $@ $<  # .cpp

$(SUBDIR): ; mkdir -p $(SUBDIR)

-include $(SUBDIR)/*.d

clean : ; -rm -fr $(OBJDIR)

.PHONY : all clean


---


# Makefile for subdir

# build shared library with -fPIC, -shared
CFLAGS    = -fPIC # -g -O3 # CXXFLAGS for .cpp
CPPFLAGS  = -MMD -MP # -I../bar
LDFLAGS   = -shared # -L$(OBJDIR)/bar
LDLIBS    = # -lbar
#CC       = $(CXX) # link with CXX for .cpp

LDFLAGS  += -Wl,-rpath,$(OBJDIR)/bar
LDFLAGS  += -Wl,-rpath,'$$ORIGIN/../lib'
LDFLAGS  += -Wl,-soname,$(soname)

# make # NDEBUG=1
ifdef NDEBUG
CPPFLAGS += -DNDEBUG
CFLAGS   += -O3 # .cpp
else
CFLAGS   += -g # .cpp
LDFLAGS  += -fsanitize=address
endif

SUBDIR    = $(OBJDIR)/foo

all : $(SUBDIR)/foo # $(SUBDIR)/bar

$(SUBDIR)/foo : $(SUBDIR)/$(patsubst %.c,%.o,$(wildcard *.c))
  $(CC) $(LDFLAGS) $^ $(LDLIBS) -o $@  # CXX for .cpp

$(SUBDIR)/%.o : %.c | $(SUBDIR)
  $(CC) $(CFLAGS) $(CPPFLAGS) -c -o $@ $<  # .cpp

$(SUBDIR): ; mkdir -p $(SUBDIR)

-include $(SUBDIR)/*.d

clean : ; -rm -fr $(OBJDIR)

.PHONY : all clean