On Sat, 9 Feb 2013 19:57:20 +0100 Ian Kumlien <pomac@xxxxxxxxx> wrote: > On Sat, Feb 09, 2013 at 09:02:06PM +0300, Sergei Trofimovich wrote: > > On Sat, 9 Feb 2013 00:30:21 +0100 > > Ian Kumlien <pomac@xxxxxxxxxx> wrote: > > > > > My builds are cluttered with: > > > <command-line>:0:0: warning: "_FORTIFY_SOURCE" redefined [enabled by > > > default] > > > > > > Which makes it hard to tell if something breaks or not. > > > > > I don't know about you, but bilding with > > > GCC 4.7.2 on gentoo, this is a issue. > > > > Unfortunately it's a gentoo specific gcc bug. I'd suggest reporting > > it to bugs.gentoo.org. That -D by default breaks linux's perf as well > > (due to -D_FOTIFY_SOURCE=2 -Werror in perf sources). > > Is it? There is a workaround in the android build system for compilers > on ubuntu. > > Where can i find that bug report? I think you need to fill the new one. > This is not a emerge, this is a normal system build. Yeah, gentoo has patched gcc specs so you get -D_FORTIFY_SOURCE=2 in gcc command line by default. http://sources.gentoo.org/cgi-bin/viewvc.cgi/gentoo/src/patchsets/gcc/4.6.0/gentoo/10_all_default-fortify-source.patch?view=markup > > Current workaround is to pass AM_CFLAGS to make: > > make AM_CFLAGS=stuff_w/o_fortify_source > > It's what gentoo's live ebuild does. > > I can't see it here in the live ebuild... sys-fs/btrfs-progs/btrfs-progs-9999.ebuild: ... src_compile() { emake \ CC="$(tc-getCC)" \ AM_CFLAGS=-D_FILE_OFFSET_BITS=64 \ ... } This line overrides in-Makefiles AM_CFLAGS. -- Sergei
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