Subj : src/xpdev/CMakeLists.txt
To   : Git commit to main/sbbs/master
From : Rob Swindell (on Debian Linux)
Date : Tue Sep 15 2026 15:31:30

https://gitlab.synchro.net/main/sbbs/-/commit/3dc56fb6b5b57541c8ddcd2e
Modified Files:
	src/xpdev/CMakeLists.txt
Log Message:
xpdev: probe for libc symbols with the Linux feature macros

The capability checks added in bcecd8108f (cheese-36-geek, 2026-09-06)
compiled their probes without the _GNU_SOURCE/_DEFAULT_SOURCE definitions
the xpdev targets are built with. glibc 2.36 (Debian 12) declares asprintf
and vasprintf only under _GNU_SOURCE, so the probes failed there, enabling
NEEDS_ASPRINTF/NEEDS_VASPRINTF. The vasprintf fallback calls the
MSVC-only _vscprintf, breaking the link of every CMake consumer of xpdev
(e.g. the doors) with "undefined reference to `_vscprintf'".

Newer glibc also declares these under _DEFAULT_SOURCE, which hid the
problem on newer hosts.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
--- SBBSecho 3.37-Linux
 * Origin: Vertrauen - [vert/cvs/bbs].synchro.net (1:103/705)

.