[Mesa-dev] [Bug 81500] wrong color in flightgear for the c172p if "Atmospheric light scattering" is used

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81500

--- Comment #24 from Barto <mister.freeman at laposte.net> ---
(In reply to comment #22)

> From what I can see, this commit has nothing to do with any issues
> introduced by the originally bad commit... this will require some
> investigation.
> 

Could it be a gcc issue ?

I use gcc 4.9.0 20140604 (prerelease) with archlinux 64 bits,

maybe some lines in commit d030a3404ca0fedf365cb0fd41eaad7abc8ff132 trigger a
weird bug in gcc during compilation,

and maybe commit 1d9f74eda75da05b4d5c7df5fc1e6f5ab8d88322 restores a correct
behaviour from gcc ( this commit changes something in
/src/glsl/Makefile.sources )


another explanation is that some functions in /src/glsl/link_varyings.cpp are
sometimes disabled by changes made by commit
1d9f74eda75da05b4d5c7df5fc1e6f5ab8d88322, the faulty function may never been
called, which prevent the bug ( cessna C172P in green if an ati radeon HD4650
is used and ""Atmospheric light scattering" option enabled in flightgear ),

I could use a debug version of mesa in order to see if some functions in
/src/glsl/link_varyings.cpp are really called if commit
1d9f74eda75da05b4d5c7df5fc1e6f5ab8d88322 is used, I think there is probably a
side effect elsewhere with this commit which cancels the bug ( and may create
another bugs undiscovered for now )

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