Re: proposal: module 'accept4'

[Eric Blake]

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According to Paolo Bonzini on 8/23/2009 10:22 AM:
> This can be committed as is but it is not enough.  You have to always
> use a replacement (thus define the emulation as rpl_accept4) and check
> whether accept4 works at runtime (and similarly for pipe2) and fall back
> to accept+fcntl if it gives ENOSYS.

Is a configure-time AS_RUN_IFELSE test good enough to find which systems
actually support SOCK_CLOEXEC?  If I'm understanding correctly, the
runtime test is only needed on systems where SOCK_CLOEXEC is defined, but
the kernel is too old to support it.  Or are you saying that it is
possible to compile on a newer glibc, then run with the same libc.so but
against an older kernel, where the result of a configure-time test is no
longer accurate?

- --
Don't work too hard, make some time for fun as well!

Eric Blake             address@hidden
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