When I compile a shader that contains #ifdef, the compiler seems to be misinterpreting it as #if - I get two errors - unexpected $end and unterminated #if (which points to the line that contains #ifdef. It's possible to work around the bug by using #if defined( .. ) instead of #ifdef .., however this is a very useful directive that is expected to work. The full construct I had there was like this: #ifdef VSHADER ..code #elif defined( PSHADER ) ..code #endif Works great on fglrx and Catalyst Win32 drivers.
What version of Mesa are you using? #ifdef does work; we have any number of tests that use it. Additionally, I ran your example snippet through glcpp in Mesa master and it works fine. So there must be something else going on with your shader. If possible, please attach it.
I was using the latest version of Mesa according to Synaptic. However, I reinstalled everything and the bug seems to be gone. So either it was a temporary problem with the configuration or something that could happen if fglrx wouldn't be properly uninstalled, but in any case, the problem is solved.
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