If you got this code by checking it out from the CVS repository of Lysator, or if you typed "make maintainer-clean", you have to perform this before following the instructions in INSTALL: ./bootstrap.sh This requires that the following programs are installed: automake-1.4 autoconf-2.13 You have to use gcc and GNU make when you build fsh after running bootstrap.sh, since the automake rules that update the dependencies require that. See the automake documentation for more information. (Note that these restrictions do not apply to distributions of fsh made with "make dist").