http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55693
--- Comment #49 from Jack Howarth <howarth at nitro dot med.uc.edu> 2013-02-08 18:17:50 UTC --- The patch in comment 47 produces no regressions in gcc for... make -k check RUNTESTFLAGS="tm.exp --target_board=unix'{-m32,-m64}'" and none in libitm for... make -k check RUNTESTFLAGS="--target_board=unix'{-m32,-m64}'" on powerpc-apple-darwin9 with Xcode 3.1.4, x86_64-apple-darwin10 with Xcode 4.2 and x86_64-apple-darwin12 with Xcode 4.6. So it seems we may not need the dummy functions at all.