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Re: [libvirt] [PATCH 1/3] Remove support for old kernels lacking private devpts

On 04/03/2013 11:12 AM, Daniel P. Berrange wrote:
>> We already reject compilation of LXC on RHEL 5 due to other
>> configure-time checks; is this something worth turning into an
>> additional configure test of whether a kernel is new enough, or are we
>> okay with just leaving it as a runtime test?
> We can't ever check kernels during configure time, because you can't
> assume the build kernel matches the distro kernel. eg all Fedora builds
> are done in a host with a RHEL kernel

configure-time tests for an added constant that affect whether
compilation works are okay; but I can live with the fact that
improvements that aren't detected by the compiler aren't worth
hard-coding into a configure-time test (that is, runtime behavior of the
kernel running configure is not necessarily a good indicator; only
compile-time behavior is useful).

Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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