The instructions in that topic are outdated, that's all :)
The message duly displayed by the script at its very beginning is, however, correct:
Before proceeding further, make sure that you're ready to go (look inside the install script):
1) configured PREFIX and SRCDIR the way you wish
(as well as CC and CXX if you're into using non-GCC compilers);
2a) if you're using 64-bit Fedora (or any distro which installs libraries to non-standard paths), added --libdir=/usr/lib64 to the marked line, or...
2b) configured PKG_CONFIG_PATH if necessary
3) installed the build dependencies listed in the script. Unless you're on Debian and derivatives, use libusb 1.0.
For instance, on Debian and derivatives, you would run:
(sudo) apt-get install git autoconf automake libtool libglib2.0-dev zlib1g-dev libusb-dev libgtk2.0-dev libglade2-dev libsdl1.2-dev gettext bison flex groff texinfo xdg-utils libarchive-dev intltool
Otherwise, the build will fail!.
ENTER to proceed, CTRL + C to abort.
Just install libarchive-dev and intltool :)