[cfe-commits] [patch] Copy diagnostic pragmas to the preprocessed output

[Richard Osborne]

This patch adds support for printing diagnostic pragmas to the preprocessed output. Previously they would be discarded (http://llvm.org/bugs/show_bug.cgi?id=5952).

Please let me know if this patch looks OK. Note diagnostic pragmas in the clang and GCC pragma namespaces will both be printed as "#pragma GCC diagnostic ...". I assumed this wouldn't matter as they should have the same behaviour.
 
Thanks,

Richard
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