someone (or their software wrongly named text editor) violated makefile syntax while adding several more lines; please see the attached patch for the fixup.
PS: guys, 1.4.0 looks pretty much a misrelease by now, did anyone try actually building it on Linux?
PPS: used it since 2001 or so, many thanks for the nice piece of software -- still have 1.0.45 installed on one of my systems to check that old binaries still work :-)
https://github.com/grzegorzmazur/yacas/issues/165