>you can't even count on tcsh or env being installed at the same path This is what tools like Autoconf and pkg-config take care of. Lots of people use them to

>you can't even count on tcsh or env being installed at the same path This is what tools like Autoconf and pkg-config take care of. Lots of people use them to discover executables and libraries and generate files with the right machine-specific variables in them. You should never assume that binaries are in /usr/bin or that libraries are in /usr/lib. A lot of packaging issues are caused by such assumptions. If you use the right tools, you don't have to bundle your dependencies. Bundling introduces a serious maintenance burden onto the developers and the packagers. It's easy to avoid bundling for C libraries and things, but with the prevalence of language-specific package managers, it's become a harder problem because everyone just assumes that you will fetch dependencies through it and never use the system package manager. It's a sad state.