Tvheadend

resolved the problem with doing ./Autobuild -t precise-amd64 but i have trusty-amd64 and when i want to compile says "target trusty-amd64 not supported"

The Precise build will work fine on Trusty (and Utopic, and any other recent 'buntu-based release) - I build and run on 14.04.1.

Me too, but i don't understand why we can't compile trusty if it's available on "https://tvheadend.org/builds/tvheadend"

It's just not supported as an option in the build script...

https://tvheadend.org/projects/tvheadend/repository/revisions/master/show/Autobuild

If it makes you feel better, rename precise-amd64.sh to trusty-amd64.sh and then you'll be able to use -t trusty-amd64

but this is cheating, doing that is like doing nothing. it's only changing name and not optimizing

Damn, you noticed...

It all depends on whethere there are material changes in library calls between 'buntu versions. as I understand it. Anything that's compiled in doesn't care about the platform - anything that's reliant solely on an API call will just use the .so libraries at runtime as needed - but anything that depends on a call that isn't there or has changed version would fail. It's only that last scenario that needs a new .deb. At the end of the day, the source code isn't changing, and you're compiling on your target system so it's incorporating anything locally that's needed, so I don't see that's it's disastrous.

By all means, dig into it and suggest some changes. You're probably right that using Precise forever isn't perfect, although Precise/Trusty/Utopic are the only currently-supported versions IIRC.