[gentoo-dev] Re: GCC 4.8 unmasking
On Wed, 14 Aug 2013 17:56:42 +0200 Luca Barbato lu_z...@gentoo.org wrote: We don't build glibc with -O3. Other libc's should either not use -O3 or use -fno-tree-loop-distribute-patterns where applicable. On certain arches the memcpy tranformation happens even on lower optimization levels or so I saw reported. I don't see how that could happen without -ftree-loop-distribute-patterns. Can you dig up a link? -- Ryan Hillpsn: dirtyepic_sk gcc-porting/toolchain/wxwidgets @ gentoo.org 47C3 6D62 4864 0E49 8E9E 7F92 ED38 BD49 957A 8463 signature.asc Description: PGP signature
Re: [gentoo-dev] Re: GCC 4.8 unmasking
On 14/08/13 01:40, Ryan Hill wrote: On Tue, 13 Aug 2013 07:13:13 +0200 Luca Barbato lu_z...@gentoo.org wrote: On 13/08/13 03:41, Ryan Hill wrote: I don't see any reason to keep this masked other than bug #416069, which needs to be fixed anyways. How does Friday sound? https://bugs.gentoo.org/416069 xorg-2.eclass: add --disable-selective-werror to configure https://bugs.gentoo.org/461954 GCC 4.8 porting gcc-4.8 can miscompile libc http://gcc.gnu.org/bugzilla//show_bug.cgi?id=56888 We should make sure we do not get bitten by this. We don't build glibc with -O3. Other libc's should either not use -O3 or use -fno-tree-loop-distribute-patterns where applicable. On certain arches the memcpy tranformation happens even on lower optimization levels or so I saw reported. lu
[gentoo-dev] Re: GCC 4.8 unmasking
On Tue, 13 Aug 2013 07:13:13 +0200 Luca Barbato lu_z...@gentoo.org wrote: On 13/08/13 03:41, Ryan Hill wrote: I don't see any reason to keep this masked other than bug #416069, which needs to be fixed anyways. How does Friday sound? https://bugs.gentoo.org/416069 xorg-2.eclass: add --disable-selective-werror to configure https://bugs.gentoo.org/461954 GCC 4.8 porting gcc-4.8 can miscompile libc http://gcc.gnu.org/bugzilla//show_bug.cgi?id=56888 We should make sure we do not get bitten by this. We don't build glibc with -O3. Other libc's should either not use -O3 or use -fno-tree-loop-distribute-patterns where applicable. -- Ryan Hillpsn: dirtyepic_sk gcc-porting/toolchain/wxwidgets @ gentoo.org 47C3 6D62 4864 0E49 8E9E 7F92 ED38 BD49 957A 8463 signature.asc Description: PGP signature
