On June 3, 2008 11:35:47 pm Kevin Atkinson wrote: > Sorry that last part should be "compiling or linking" (really should > proof read better before sending). By this I mean you will compile with > CXX='-g' for debug mode and CXX='-O2' for release mode.
'-O2' is an optimization flag and has nothing to do with '-g' The way the gcc compiler builds a program is sort of in this order. -O1 (default if not specified) is basically a quick-n-dirty compile. -O2 looks for possible optimizations to reduce code, for example if you have a function but it is only used once, the compiler will attempt to put the code in-line -O3...O6 adds further optimizations and speed enhancements. -OS is supposed to try and build small footprint code. I don't know if it was/is done, but I think the linux kernel was built with -O6 which was a nonsensical optimization value at the moment (but worth keeping for future) since the gcc compiler doesn't really go much further than -O3 at the moment. Most x86 code tends to get built with a preference for -O2 since it has a good tradeoff between compile speed and a reasonable code size when done. I've seen a few example bugs in the aspell buglist in sourceforge with references for -O3 for sparc. I would probably expect tiny ARM machines would try for -OS if they could. This DNDEBUG problem is really between -g and -DNDEBUG so you meant CXX='-g -O2' for debug mode and CXX='-O2' for release mode. _______________________________________________ Aspell-devel mailing list Aspell-devel@gnu.org http://lists.gnu.org/mailman/listinfo/aspell-devel
