Dnia 2014-04-20, o godz. 21:14:51 Ryan Hill <rh...@gentoo.org> napisał(a):
> As more and more packages are starting to add LTO flags automatically through > their build systems, I thought I'd point out a couple things: > > - LTO utterly destroys debug info. Flags like -g are incompatible with LTO. > > - LTO causes .GCC.command.line sections to be discarded, which means your > package will always be QA flagged as ignoring CFLAGS. > > - LTO takes a _lot_ of memory. That memory is required on the host arch. > Distcc doesn't help things here, because linking happens locally. Consider > all the archs your package is built on, and if they all routinely have > multiple GBs of memory installed. Those are the reasons why I have disabled the default -flto in systemd. For other packages based on systemd configure macros, it can be disabled via the following configure hack: cc_cv_CFLAGS__flto=no -- Best regards, Michał Górny
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