* OpebBSD: remove socketpair() for AF_INET and AF_INET6.
socketpair() is only supported on AF_UNIX.
* NetBSD: remove socketpair() for AF_INET and AF_INET6.
socketpair() is only supported for AF_UNIX.
* FreeBSD: remove socketpair() for AF_INET and AF_INET6.
socketpair() only supports AF_UNIX.
* Linux: remove socketpair for AF_INET and AF_INET6.
socketpair only supports AF_UNIX.
* Autogenerated files.
These are manually generated for all platforms you are not
running on. FreeBSD in this case.
* executor: rebase.
* sys/freebsd: rebase.
* sys/linux: use AF_UNIX based socketpair for nbd.
This was suggested by Dmitry.
Fixes#845
Currently when we get target consts with target.ConstMap["name"]
during target initialization, we just get 0 for missing consts.
This is error-prone as we can mis-type a const, or a const may
be undefined only on some archs (as we have common unix code
shared between several OSes).
Check that all the consts are actually defined.
The check detects several violations, to fix them:
1. move mremap to linux as it's only defined on linux
2. move S_IFMT to openbsd, as it's only defined and used on openbsd
3. define missing MAP_ANONYMOUS for freebsd and netbsd
4. fix extract for netbsd
