[Puredata] Compiling a Patch build with flext

Copy and paste a Vogon citation :

Since there's a package.txt file with it, the external is meant to be compiled with the flext build system.

You can have a look at the flext readme.txt or build.txt files.
It boils down to the following:

sh path_to_flext/build.sh pd gcc
sudo sh path_to_flext/build.sh pd gcc install