FWIW, nfroyd is working on replacing stlport with libc++, so perhaps that problem is about to go away!
On Wed, Jun 3, 2015 at 9:11 AM, James Willcox <[email protected]> wrote: > That's pretty fascinating. I don't know if we've ever even tried building > Fennec with LTO before. I tried just now and ran into some issues with > missing symbols in stlport, but it seems like it would be nice to get this > going. > > James > > On Wed, Jun 3, 2015 at 10:44 AM, Chris Kitching <[email protected]> > wrote: > >> Did you notice the bit in the GCC 4.9 release notes about LTO with >> Firefox? >> >> https://gcc.gnu.org/gcc-4.9/changes.html >> >> With LTO enabled, they remarked: "Memory usage building Firefox with >> debug enabled was reduced from 15GB to 3.5GB; link time from 1700 >> seconds to 350 seconds." >> >> ... Does this mean you can now enable LTO, if you haven't already? (I >> guess you turned it off so far because of the mildly ridiculous compute >> requirements). >> That might yield substantial binary size reduction, which would be nice... >> >> >> On 03/06/15 16:21, James Willcox wrote: >> > Later today I am planning to push some changes that will make the >> > builders use NDK r10e and GCC 4.9. We needed to upgrade the NDK to work >> > around a PIE linking issue on x86, and the latest NDK only has GCC 4.8 >> > and 4.9. I've been using 4.9 locally for a while now, so I don't expect >> > too many issues, but developers should consider upgrading their local >> > copies too. >> > >> > One nice thing about GCC 4.9 is that it supports colorized errors and >> > warnings, which can really help identify problems during the build. >> > You'll be able to enable this with the following bits in your mozconfig: >> > >> > export CFLAGS="-fdiagnostics-color" >> > export CPPFLAGS="-fdiagnostics-color" >> > export CXXFLAGS="-fdiagnostics-color" >> > export LDFLAGS="-fdiagnostics-color" >> > >> > We should probably add a --enable-color-diagnostics configure option to >> > do this for you. >> > >> > Thanks, >> > James >> > >> > >> > _______________________________________________ >> > mobile-firefox-dev mailing list >> > [email protected] >> > https://mail.mozilla.org/listinfo/mobile-firefox-dev >> > >> >> _______________________________________________ >> mobile-firefox-dev mailing list >> [email protected] >> https://mail.mozilla.org/listinfo/mobile-firefox-dev >> > > > _______________________________________________ > mobile-firefox-dev mailing list > [email protected] > https://mail.mozilla.org/listinfo/mobile-firefox-dev > >
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