makefile - Automatic dependency list not generated in a different setting of directory structure -


i have following directory structure:

root-----makefile    |-----src  #all source files here.    |-----obj  #all object files here.    |-----bin  #the final target.

the contents of makefile given below:

target  =       exec  cc              =       gcc cflags  =       -g -i. linker  =       gcc -o lflags  =       -i. -lm -lpthread  bindir  =       bin objdir  =       obj srcdir  =       src interface =     interface std     =       -std=c99  programsources  :=      $(wildcard $(srcdir)/*.c) programinterface:=      $(wildcard $(interface)/*.h) objects         :=      $(programsources:$(srcdir)/%.c=$(objdir)/%.o)  $(bindir)/$(target)     :       $(objects)         $(linker) $@ $(lflags) $(objects) $(std)  #pull dependencies .o files -include $(objects:.o=.d)  $(objects)              :       $(objdir)/%.o :$(srcdir)/%.c         $(cc) $(cflags) -c $< -o $@ $(std)         $(cc) $(cflags) -mm $< > $*.d         @mv -f $*.d $*.d.tmp         @sed -e 's|.*:|$(objdir)/$*.o:|' < $*.d.tmp > $*.d         @sed -e 's/.*://' -e 's/\\$$//' < $*.d.tmp | fmt -1 | \          sed -e 's/^ *//' -e 's/$$/:/' >> $*.d`         @rm -f $*.d.tmp`  .phony  :       run run             :`         ./$(bindir)/$(target) ${type} ${inp_file}

i have used tutorial here have been modified suit corresponding directory structure. has got wrong in modification , cannot understand what. dependency list generated in .d files not taken account i.e. if change .h rules not compiling.

you appear producing dependency files in root/, looking them in obj/.

try changing this:

-include $(objects:.o=.d)

to this:

-include *.d

there other improvements can make, once makefile working.

edit: further improvements

1) choice of put dependency files arbitrary, if put them in obj/, can simplify $(objects) rule quite lot:

-include $(objdir)/*.d  $(objects): $(objdir)/%.o :$(srcdir)/%.c     $(cc) $(cflags) -mmd -mp -c $< -o $@ $(std)

2) programinterface , interface aren't used, can remove them.

3) putting -o in linker dangerous. , don't forget automatic variable $^:

linker = gcc $(bindir)/$(target) : $(objects)     $(linker) $@ $(lflags) $^ $(std)

4) wise give run prerequisite:

run: $(bindir)/$(target)     ./$< ${type} ${inp_file}

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