[Mesa-dev] glsl2 compiler preprocessor regression

[Ian Romanick]

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Thomas Jones wrote:
> I have a shader that fails to pre-process on the new compiler, but
> does compile on the old one, I've reduced it to this:
> 
> #ifdef FOO
> #if FOO == 4
> #elif SAMP == 5
> #endif
> #endif
> void main()  { gl_FragData[0] = vec4(0);}

I've added a piglit test case for this, and I've created a bug report.
Thanks.

https://bugs.freedesktop.org/show_bug.cgi?id=29489

> I think it might be mis-nesting the #elif since it succeeds if I
> change it to:
> 
> #ifdef FOO
> #if FOO == 4
> #endif
> #endif
> void main()  { gl_FragData[0] = vec4(0);}


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