"Charles Kerr" <[EMAIL PROTECTED]> posted [EMAIL PROTECTED], excerpted below, on Tue, 22 Aug 2006 19:22:02 -0500:
> Duncan is absolutely right about -g, though I'd go further and recommend > adding -ggdb3 to your CFLAGS before compiling glib/atk/pango/gtk/gmime. Only to be fair it wasn't me but "walt" that suggested the -g. I simply addressed the -fomit-frame-pointer arch specific debugging thing, with the consequent implications for -O optimization. The -g stuff seemed a good point which I agree with, but as I said, I don't claim to be either a C/C++ coder or a debugging expert, so while I know enough to follow the thread and comment about a particular option (-g or -fomit-frame-pointer) after it is brought up, the -g suggestion didn't spontaneously occur to me, and it was walt that mentioned it. > Likewise I'd add -ggdb3 to your CXXFLAGS before compiling Pan. For Pan + > gcc 4.x I use: % CXXFLAGS="-ggdb3 -Os -Wall" ./configure, and replace > "-Os" with "-O" for older gcc's or when using valgrind. Likewise, that looks entirely logical after I see it posted, but I don't know enough about it to suggest it on my own. =8^( The thing I find most interesting there however is the choice of -Os. I use that myself, over the more common -O2 or -O3, because it is my opinion (after a bit of study) that modern CPUs tend to be cache size and memory bandwidth limited more than clock cycle limited, so reducing size (-Os) to better fit in cache is more efficient than optimizing for CPU cycles (-O3, to a lessor extent -O2) at the expense of size. It would seem you are of a similar opinion. =8^) Of course, as any good Gentooist, I could debate the merits of various CFLAGS, and whether they are "ricer" choices or logical optimization choices, until the cows come home. =8^) Case in point (warning, pretty hard core Gentoo-speak in the first couple pages <g>), here's a 29KB pdf blubb, aka Simon Stelling, Gentoo/amd64 project op-lead, made of a multi-page post of mine. (FWIW I became aware of it after someone pointed it out as a case of belaboring the obvious, and I don't know exactly why blubb chose to PDF it but knowing him it could well be a bit of fun at my expense, but I posted it and stand by what I posted, in any case. If I can't take a bit of fun at my expense, I shouldn't be posting in a public forum, and despite all, I'm a bit proud of it, or I'd certainly not be posting the link. =8^) http://dev.gentoo.org/~blubb/duncan.pdf -- Duncan - List replies preferred. No HTML msgs. "Every nonfree program has a lord, a master -- and if you use the program, he is your master." Richard Stallman _______________________________________________ Pan-users mailing list Pan-users@nongnu.org http://lists.nongnu.org/mailman/listinfo/pan-users
