Small cmake issues

[Carbonflux]

Depending on how you configure Qt it can drag in some openGL stuff which for example glx is part of etc. Excluding openGL from luxrays ( which needs openGL just to open a window in the case of SLG ) and lux is a different issue imo. Hopefully you are aware that openCL and openGL are different Qantourisc - you can tell by the GL/ vs the CL/

[jeanphi]

Hi,

You're right Carbonflux, hopefully on a headless machine, you won't try to run luxrender but luxconsole only, so you should be safe.

Jeanphi

[Qantourisc]

-march and -mtune, better be on the safe side, changing those to native will probably only bring a very marginal gain but might break compilation for users that might not be developers

- Unless there are bugs in the code, this works just fine, basicily all this does it try to optimize better for your cpu AND activate all other CPU options you have SSE4, etc...
- Imo it's quite stable (Gentoo user here, all my system (7) run on march=native (mtune is implied by march)).
- Gains will indeed probablly be marginal.

The biggest/real problem (IMO) are:
- the fact that you are producing bins that might not run on another machine.
- older GCC version don't know "native"

[SATtva]

The biggest/real problem (IMO) are:
- the fact that you are producing bins that might not run on another machine.
- older GCC version don't know "native"

Precisely why i agree with jeanphi to keep flags on the safe side here so it compiles out-of-the-box on most systems.

[Qantourisc]

Suggested patch for luxrays as attachment.
If I did something wrong, please shout (in a friendly matter).
(I assumed GLUT and GLEW are not needed without OpenCL. Also I configured the paths in a dirty way, if there is a better way shout.)

[jensverwiebe]

Sorry, i don`t accept your patch for several reasons.

You have logical issues, breaking flags, etc..
Better leave all as is in RC-phase.

Jens

[jeanphi]

Hi,

I've pushed a set of changes based on Qantourisc ideas. It should now be easier to build for headless machines.

Jeanphi

[Carbonflux]

I've pushed a set of changes based on Qantourisc ideas. It should now be easier to build for headless machines.

Thank you

I think this will help a lot because more people are using the computing cloud for rendering now.