When converting a function from LLVM to C, the CBE generates linkonce functions
as inline functions.  However, this does not provide the correct semantics; if
two functions with the same name are converted to C and then linked, the
function bodies (if generated) will conflict, and a link error will occur.

The CBE should declare linkonce functions as weak in C; it will provide the
correct linking semantics, but won't be as efficient in cases where the function
is unreferenced and can be throw away.

Will be fixed for 1.2.  Assigned to myself.

Fixed with
http://mail.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20040223/012282.html.