I\'m working on a parser for C. I\'m trying to find a list of all of the context-free derivations for C. Ideally it would be in BNF or similar. I\'m sure such a thing is out
You could always use Annex A of the C11 standard itself. The freely available draft standard will work for your purposes, at http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1570.pdf .
This is an ANSI-C grammar, updated to C11 standard. Should serve your purpose.
http://www.quut.com/c/ANSI-C-grammar-y.html