On Sun, 2005-Aug-07 11:07:16 +0300, Vasil Dimov wrote: >On Sat, Aug 06, 2005 at 09:49:36PM +1000, Peter Jeremy wrote: >> >... >> scratch with different CPUTYPE and/or CFLAGS? (I'm currently using >> CPUTYPE=athlon-xp and CFLAGS=-O -g). > >Hmmz, CFLAGS=-O -g, what do you expect from this combination?
Optimise the code and generate symbolic debugging information. Unlike many other compilers, "-O" and "-g" are not mutually exclusive in gcc. >gcc(1): >Without `-O', the compiler's goal is to reduce the cost of com- >pilation and to make debugging produce the expected results. Without "-O", gcc will compile each statement independently and ensure that any results are assigned to the target variables at the end of each statement. This makes is easy to debug because the program flow will match the source code. "-O" allows the compiler to re-order code, delete dead code, remove variable assignments, etc. The code is still functionally equivalent but is not as easy to debug because of the re-arrangements. This is more suited to production code where you don't intend to perform any debugging but do not want to make it impossible to debug if an unexpected problem occurs. -- Peter Jeremy _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
