Hi, Does an installed compiler have (did it store somehow) an indication that it was built using profile feedback? Also, can I build an Ada (and C) in a non-profiled version and install them into, say: /opt/gcc-4.3.5-profiled and then build everything else (including an explicit C) as profiled and install them into the same place and have it ... do what I expect/hope (i.e. C is replaced with a profiled version without screwing up the non-profiled Ada)? Does profiling affect all parts or C only? Thanks! kevin