Bug#924712: crypt() not available _XOPEN_SOURCE is defined

[Laurent Bigonville <bigon@debian.org>]

Package: libc6-dev
Version: 2.28-8
Severity: serious

Hi,

The crypt.3 manpage, state that _XOPEN_SOURCE should be define for
crypt() to be available.

But it looks that it's currently the opposite, if _XOPEN_SOURCE is
defined, the function cannot be found.

This actually looks like a regression compared to stretch.

Regards,
Laurent Bigonville

-- System Information:
Debian Release: buster/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.19.0-3-amd64 (SMP w/8 CPU cores)
Locale: LANG=fr_BE.UTF-8, LC_CTYPE=fr_BE.UTF-8 (charmap=UTF-8), LANGUAGE=fr_BE:fr (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages manpages-dev depends on:
ii  manpages  4.16-1

manpages-dev recommends no packages.

Versions of packages manpages-dev suggests:
ii  man-db [man-browser]  2.8.5-2

-- no debconf information