Comment by Neywiny

It might not be documented. You may have to do the grunt work when that happens and read the code.

If you can't find it in the code, my recommendation is to just delete the CRT files and see who screams.

Once you've found it, check up the call stack (either by running a debugger or looking for calls to the functions in the source) and see if any of them have if statements.

If truly not a single conditional is present between main() and linking the CRT, you may just want to add one and submit a patch.

If you can edit your post it would also be helpful to know which flags you've already tried.