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To: <fupan.li@windriver.com>, <jason.wessel@windriver.com>,
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From: Bruce Ashfield <bruce.ashfield@windriver.com>
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Date: Fri, 15 Jul 2016 11:03:53 -0400
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Subject: Re: [PATCH] lxc: fixes lxc segment fault issue on arm if it is compiled with GCC 5.2
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merged.

Bruce

On 2016-07-15 06:05 AM, fupan.li@windriver.com wrote:
> From: fli <fupan.li@windriver.com>
>
> If the lxc is compiled with gcc 5.2 -O2 optimization on arm,
> lxc-console/lxc-stop command always produce segment fault.
>
> The same issue also occurred on systemd: [YOCTO #8291]
>
> For lxc, after several testing, it only needs to disable
> schedule-insns2 to fix the segment fault issue.
>
> Signed-off-by: fli <fupan.li@windriver.com>
> ---
>   recipes-containers/lxc/lxc_2.0.0.bb | 3 +++
>   1 file changed, 3 insertions(+)
>
> diff --git a/recipes-containers/lxc/lxc_2.0.0.bb b/recipes-containers/lxc/lxc_2.0.0.bb
> index 5004b9e..e436057 100644
> --- a/recipes-containers/lxc/lxc_2.0.0.bb
> +++ b/recipes-containers/lxc/lxc_2.0.0.bb
> @@ -49,6 +49,9 @@ EXTRA_OECONF += "--enable-log-src-basename"
>
>   CFLAGS_append = " -Wno-error=deprecated-declarations"
>
> +# disable problematic GCC 5.2 optimizations [YOCTO #8291]
> +FULL_OPTIMIZATION_append_arm = " -fno-schedule-insns2"
> +
>   PACKAGECONFIG ??= "templates \
>       ${@bb.utils.contains('DISTRO_FEATURES', 'selinux', 'selinux', '', d)} \
>   "
>