${CC} ${CCFLAGS} -I${TESTROOT}/include -dynamiclib up.c -DSTUB -o libup.stub -install_name libup.dylib
${CC} ${CCFLAGS} -I${TESTROOT}/include -dynamiclib down.c -o libdown.dylib -Wl,-upward_library,libup.stub
${CC} ${CCFLAGS} -I${TESTROOT}/include -dynamiclib up.c libdown.dylib -o libup.dylib
${CC} ${CCFLAGS} -I${TESTROOT}/include -dynamiclib up.c -DSTUB -o libup.stub -install_name libup.dylib
${CC} ${CCFLAGS} -I${TESTROOT}/include -dynamiclib down.c -o libdown.dylib -Wl,-upward_library,libup.stub
${CC} ${CCFLAGS} -I${TESTROOT}/include -dynamiclib up.c libdown.dylib -o libup.dylib