[cfe-dev] RFC: Incompatible, but similar pragma handling

["C. Bergström"]

I can give more precise details if necessary, but it's more a general 
question to start.

Any recommendations on how to best handle two similar, but incompatible 
sets of pragma?

Example
clang -foo
#pragma bar baz - OK
#pragma bar baz blah - Not ok
#pragma foobar - OK

clang -foov2 (not backwards compatible)
#pragma bar baz - Not ok
#pragma bar baz blah - OK
#pragma foobar - OK
--------
Basically with the extended version the sema is going to get messed with 
quite a bit. Maybe this is implementation specific. When I look at what 
we've coded internally, which is along the similar lines as the Intel 
OMP work - I don't think this will be easy.

comments/advice?

Thanks