c++ - Compiling multiple executables with make -

i following makefile capable of compiling multiple executables:

cxx      = clang++ cxxflags = -g -wall --std=c++11 objs     = two_rung.o three_rung.o dumbinterp.o interp.o writeladdermpo.o prog     = two_rung three_rung dumbinterp interp sources = two_rung.cc three_rung.cc dumbinterp.cc interp.cc writeladdermpo.cc heads = writeladdermpo.h includes = -i $(home)/itensor libs     = -l $(home)/itensor/lib -litensor -lstdc++ -framework accelerate  all: $(prog)  $(prog): $(objs)     $(cxx) $(includes) -o $(prog) $(objs) $(libs)  %.o: %.cc $(heads)     $(cxx) $(includes) -c -o $(objs) $(sources) 

the executables denoted prog. when try make 1 of these executables, example interp, instead

computer:folder username$ make interp clang++ -i /users/username/itensor -c -o two_rung.o three_rung.o dumbinterp.o interp.o writeladdermpo.o two_rung.cc three_rung.cc dumbinterp.cc interp.cc writeladdermpo.cc 

which say, make tossing files in when call them variables, totally makes perfect sense. want behave like:

clang++ -i /users/username/itensor -c -o interp.o interp.cc 

and then

clang++ -i /users/username/itensor -o interp interp.o -l $(home)/itensor/lib -litensor -lstdc++ -framework accelerate 

how make this? thanks!

to expand on comments.

consider rule

$(prog): $(objs)     $(cxx) $(includes) -o $(prog) $(objs) $(libs) 

this expanded make into

two_rung three_rung dumbinterp interp: two_rung.o three_rung.o dumbinterp.o interp.o writeladdermpo.o     clang++ -i $(home)/itensor -o two_rung three_rung dumbinterp interp two_rung.o three_rung.o dumbinterp.o interp.o writeladdermpo.o -l $(home)/itensor/lib -litensor -lstdc++ -framework accelerate 

not quite had in mind think.

instead need specify each executable target , dependencies explicitly:

two_rung: two_rung.o writeladdermpo.o  three_rung: three_rung.o writeladdermpo.o  dumbinterp: dumbinterp.o writeladdermpo.o  interp: interp.o writeladdermpo.o 

with flag variables set correctly make link correctly.

---

as compilation of source files object files, have problems there too, where

%.o: %.cc $(heads)     $(cxx) $(includes) -c -o $(objs) $(sources) 

will expanded to

%.o: %.cc writeladdermpo.h     clang++ -i $(home)/itensor -c -o two_rung.o three_rung.o dumbinterp.o interp.o writeladdermpo.o two_rung.cc three_rung.cc dumbinterp.cc interp.cc writeladdermpo.cc 

that's not how work, need create each object file each source file separately. fortunately can still use same basic rule, don't need provide command create object file:

%.o: %.cc $(heads) 

that's it, no command needed. need e.g.

cxxflags += $(includes) 

before rule.