openssh unix dev - May 2019 - [PATCH] configure.ac: Disable utmp/wtmp on musl-based systems

Hi,

The configure script enables utmp and wtmp functionality by default
on musl-based systems as it detects the stubs [1] provided by the
libc. Whilst having these features enabled is not harmful, it will lead
to repeated log messages:
> wtmp_write: problem writing /dev/null/wtmp: Not a directory
The proposed patch will disable utmp and wtmp by default on musl-based
systems.

[1]
https://wiki.musl-libc.org/faq.html#Q:-Why-is-the-utmp/wtmp-functionality-only-implemented-as-stubs?

Wolfgang
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