/bin/bash: makecython++:command not found

[sxy2021]

command: cd submodules/KittiBox/submodules/utils/ && make
error: makecython++ stitch_wrapper.pyx "" "stitch_rects.cpp ./hungarian/hungarian.cpp"
/bin/bash: makecython++: command not found
Makefile:5: recipe for target 'all' failed
make: *** [all] Error 127
environment: python2.7
MultiNet/submodules/KittiBox/submodules/utils
makefile:
SHELL := /bin/bash

.PHONY: all
all:
pip install runcython
makecython++ stitch_wrapper.pyx "" "stitch_rects.cpp ./hungarian/hungarian.cpp"