http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44107
--- Comment #24 from Jack Howarth <howarth at nitro dot med.uc.edu> --- (In reply to David Fang from comment #22) > Do one of these apple libunwind sources (0.30, 0.35.1) correspond to what's > bundled in libgcc_s in darwin8,9,10? > > http://opensource.apple.com/tarballs/libunwind/ No. The libunwind sources are the replacement compact and compatibility unwinders that Apple introduced in 10.7. You will see that the 0.30 release first appears at http://www.opensource.apple.com/release/mac-os-x-107/. Note that if you look at http://www.opensource.apple.com/source/libgcc/libgcc-13/stub.c from 10.6.8, you will see that the unwinder calls resided in libgcc_s up to 10.5 after which they were subsumed into libSystem. I am unclear if the subsumed unwinder calls in 10.6.x were based on the code from libgcc but these certainly aren't based on libunwind. Since Apple never released the source code for theses files, it is difficult to know their heritage in 10.6.x. Also see... http://lists.cs.uiuc.edu/pipermail/llvmdev/2009-September/025894.html http://lists.cs.uiuc.edu/pipermail/llvmdev/2009-September/025898.html
