On Wed, Jun 09, 2010 at 09:13:56AM -0400, jhell wrote: > On 06/09/2010 04:14, Ilya Bakulin wrote: > > Hi hackers! > > > > While discussing my project's implementation details with my mentor, > > Alexander Leidinger, we've found that one of the ideas needs to be > > discussed with community, > > to find out possible use cases. > > That is, if it should be possible to spoof non-existing features. For > > example, if currently running kernel doesn't support FreeBSD 5.0 compat > > layer, "kern.features.compat_freebsd5" will be absent when querying > > features list. The question is -- are there any cases when we want > > "kern.features.compat_freebsd5" be present? If some feature is not in > > kernel, then presenting its existence to the userland is useless > > and may be even harmful, if, for example, some application relies on this > > feature. > > Or there are some scenarios where such cheat is useful? > > > > I can not think of any viable reason why one would want to "spoof" this > when it is not available. Many ports are doing wrong thing there, checking for run-time features at the build-time, turning on/off some functionality depending on its presence on the build host.
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