This means you have an older version of MinGW in yoiur path.
Make sure, that the bin-directory of the MinGW-version coming with C::B comes first in the systems path-variable, or change to a more recent (nightly-)build of :B.
The 8.02 release uses the system-path, newer versions prepend the master-path (set in the toolchains-tab) to the system-path.