Stefano, There's a lot of confusion here, so let's go back a few steps. First, the binary installer ifeffit-1.2.5a-Mac10.3.dmg does install a complete version of Ifeffit 1.2.5 with Perl/Tk 804.027. You asked specifically about how to build this from source. I'm not sure why you want to do this, but that's OK: building from source is a fine thing to do. But let me emphasize that the goal of doing this would be to reproduce exactly what comes in the binary installer. Second, aside from g77 for building, Ifeffit relies and should use NOTHING from Fink. (Fink's wget makes the description of downloading easier, but is not needed). I think this cannot be stressed enough so I will repeat it: At no point, should Ifeffit use PGPLOT, Aquaterm, or anything else from Fink. If it does, there was a build error. As Paul pointed out, using the ifeffit-1.2.5.tar.gz source kit should not have worked. I don't understand what happened for you, but perhaps it used PGPLOT from fink. In any event, you need to rebuild from source (the 'configure' and 'make install' steps) using the newer version of iconf_pgplot, which should replace the one in the base ifeffit-1.2.5 folder -- that is, in the source directory. Again, rebuilding this will build the ifeffit library as distributed in the binary installer. If this is confusing, perhaps you should explain why you want to build from source as opposed to using the binary installer. --Matt