'compile the Espresso project : make[1]: lint: Command not found

I'm compiling the "Espresso" project in Ubuntu download from here(https://ptolemy.berkeley.edu/projects/embedded/pubs/downloads/espresso/index.htm).When I type command "make" under the project, there is an error: make[1]: lint: Command not found. So I checked the Makefile file, I found a line code

lint: ${LSRC} ${DRVRSRC} ${HDR} ${LINTLIBS}
     lint ${LINTFLAGS} ${LSRC} ${DRVRSRC} ${LINTLIBS} ${LDFLAGS} | tee lint

I guess the "lint" maybe a Linux command, and I should install it by hand. So I search online and try to use apt-get install splint from someone's advice to solve this problem, but it doesn't work. I need help...



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