svn commit: r293783 - head/lib/libc/sys

[John Baldwin]

On Tuesday, January 12, 2016 08:53:57 PM Jilles Tjoelker wrote:
> Author: jilles
> Date: Tue Jan 12 20:53:57 2016
> New Revision: 293783
> URL: https://svnweb.freebsd.org/changeset/base/293783
> 
> Log:
>   Update futimens/utimensat for MFC to stable/10:
>   
>   * Fix __FreeBSD_version check.
>   * Update history section in man page.
>   
>   An MFC of this commit to stable/10 will allow using the new system calls
>   instead of the fallback.
>   
>   MFC after:	3 days

Why does futimens.c exist?  Given that we do not support forwards compatibility
(newer libc on older kernel) only backwards compatibility (older libc on newer
kernel), libc should just always call the system call directly.  This is what
we do for all other system calls and would avoid the issue of the earlier MFC
not actually working.  Allowing the unsupported 'make installkernel ; make
installworld ; reboot' cycle to work across this change doesn't seem worth the
effort of maintaining the osreldate checks here.

-- 
John Baldwin