------- Comment #2 from pcarlini at suse dot de 2007-11-15 22:30 ------- I think this is essentially invalid. Note that now we also have the various __GCC_HAVE_SYNC_COMPARE_AND_SWAP_* macros: http://gcc.gnu.org/onlinedocs/cpp/Common-Predefined-Macros.html -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34115