New issue by lemmi on void-packages repository

https://github.com/void-linux/void-packages/issues/20150

Description:
`ppp` silently breaks on musl:

https://gist.github.com/lemmi/56bf7a72a13e6a232bbd98ffaf200f2f#file-gistfile1-txt-L63-L98

quick fix: 
`sed -i "/^#define HAVE_SYS_CDEFS_H 1/d" pppd/plugins/rp-pppoe/config.h`
With this cdefs.h won't be included and it compiles fine.
I have no idea, why this doesn't interrupt the build process.

What's the proper solution here?