I believe citb0in is asking where to download the PureBasic compiler itself, not Etar's PureBasic source code file(s). I haven't searched myself, but it shouldn't be rocket science to find the needed version of the PureBasic compiler for Linux with the help of internet search engines and/or Linux package search sites.
That was my question, absolutely. The source code is available but I wasn't able to found a working and usable PureBasic installation source.