No. I'm not sufficiently good with scons to write a proper detection of clang / darvin and conditionally add the flags. This patch will no longer be needed in mongo 2.6.

I have done some tests with a master branch of mongo: https://github.com/romaninsh/mongo/commit/a3744c46b9c856f907ad63b42145a0c1526dad84#diff-cc8093822b396591a5530a463c87d048R1233, it is simple to detect clang there.