http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54404
--- Comment #11 from Jack Howarth <howarth at nitro dot med.uc.edu> 2012-10-18 00:15:58 UTC --- The darwin12 specific non-linker failures are suppressed if... -isysroot `xcode-select --print-path`/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.7.sdk is added to the compilation flags indicating that this is an ABI change.
