Ciaran McCreesh wrote the following on 03.10.2006 14:26 : > On Tue, 03 Oct 2006 02:56:42 +0200 Lionel Bouton > <[EMAIL PROTECTED]> wrote: > | Being able to tune the CFLAGS is part of one of the core principles of > | Gentoo: let the user be in control. > > What? No it isn't. >
Maybe it depends on what you mean by 'in control'. What I mean is that you have a good stable base from which to work on, but nothing prevents you to tweak things like you want: Gentoo doesn't get in your way. http://www.gentoo.org/main/en/about.xml mentions "Extreme Configurabiliy" and the main picture states "Larry the Cow was in control. And he liked it.". > | <li>nss_ldap stopped working with <c>-ffast-math</c> (reported to > | break many packages changing with the actual gcc version)</li> > > Uh, -ffast-math has never been and will never be a safe thing to stick > in CFLAGS. > I agree (how could I say otherwise after spending several days with a hole in my foot finally finding that I had a gun named fast-math in my hand :-) ). Apparently many developpers think that it might be in CFLAGS though (see the amount of 'filter-flags -ffast-math' in ebuilds) so a reminder might not be wasted for some users. > > | Users with unsupported CFLAGS (see the <uri > | link='http://gentoo-wiki.com/CFLAGS_matrix'>CFLAGS matrix</uri> for > | example) might want to return to safe CFLAGS (see <uri > | link='http://gentoo-wiki.com/Safe_Cflags'>Safe CFLAGS</uri>) if recent > | updates caused them stability problems. On the other hand, more > | adventurous users might want to experiment with CFLAGS that didn't > | work properly with gcc-3.4.6... As always, the user is in control. > > Linking to that is a very bad idea. The wiki is in control of the > minority ricer fringe. > > Ok. Anyway I'm now convinced that a dev-proofed version of its content in the GWN would be far better. > GWN shouldn't be advocating this kind of thing at all. Here's a better > paragraph: > > <p>We would like to remind you that using anything beyond -O2 > -fomit-frame-pointer -march/-mcpu/-mtune in CFLAGS or CXXLFAGS (and > -mieee, -mabi etc on selected archs that tell you to do this), and using > anything at all in LDFLAGS or ASFLAGS, is pointless and will lead to a > broken system. Your penis length is not proportional to the size of your > CFLAGS.</p> > > Hum, I'll leave out the last sentence or rephrase it... I'd prefer to be more soft-spoken: pointless might be a little too much too. Let's say that the cost-risk/benefit ratio is not worth it for the vast majority of users. CFLAGS tuning should probably only be used by people with very specific needs (gcc devs/testers, HPTC people with extensive knowledge/experience of the problems involved). For LDFLAGS and ASFLAGS I'll take your word for it (I never even tried modifying them myself). Lionel. -- gentoo-dev@gentoo.org mailing list
