Hi Michael,
The shader code seems indeed to be faulty and I found the errors
generated quite appropriate. Maybe your driver in the Linux is quite
sloppy and uses some extensions. Nvidia for instance allows all sort of
non-standard functions ( hlsl saturate etc.)
I usually use ATI Shader Analyzer. It seems to stick to the GLSL
specifications very tightly [1].
Unfortunately I'm on vacation and don't have my developer laptop with
me, so I cannot check directly.
[1]
http://developer.amd.com/tools-and-sdks/graphics-development/gpu-tools/gpu-shaderanalyzer/#download
Cheers
Sebastian
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