Compiling nhc 1.08 on a RedHat 7.1 machine, I get hmake -nhc98 -K10M +CTS -H20M -CTS Hatobserve /home/chak/sandbox/src/nhc98-1.08/targets/ix86-Linux/obj/hat/hatlib.a -d/home/chak/sandbox/src/nhc98-1.08/lib/ix86-Linux make[1]: hmake: Command not found make[1]: *** [/home/chak/sandbox/src/nhc98-1.08/lib/ix86-Linux/hat-observe] Error 127 make[1]: Leaving directory `/home/chak/sandbox/src/nhc98-1.08/src/tracer/hat' make: *** [lib/ix86-Linux/hat-stack] Error 2 It seems as if the path to `hmake' got lost somewhere. I worked around it by doing a `make install' at this point followed by another `make' (and another `make install'). Cheers, Manuel [1] You need gmp-devel to compile programs using gmp, as opposed to running programs that have been dynamically linked against gmp.