Disable analysis for lexer files?

Hi,

KDevelop is doing semantic analysis on the Flex lexer file (extension 
.ll) in my C++ terminal project, and generating lots of incorrect 
warnings because it doesn't understand the format. I switched the file 
mode to "Lex/Flex" and disabled the analyzer plugins, but still it is 
happening. Is there a way to turn analysis off for a specific file or 
file type? Thanks.

Jason