Yes Scintilla is designed to be built-in to apps that use it.
Best way to do a simple build is:
``` cd somewhere, even home is fine mkdir geany-git; cd geany-git git clone https://github.com/geany/geany.git cd geany ./autogen.sh --prefix=absolute path to somewhere/geany-git make install cd ../bin; ./geany -c ../config test test test cd ../..; rm -rf geany-git ```
That installs and runs a totally isolated copy of Geany that does not interfere with your system, remember I said don't use the git version in production yet, and you can remove it when finished.