Zhu Zihao schreef op za 12-03-2022 om 10:38 [+0800]:
> > (*) Could be avoided by symlinking pkg-config files into the pkg-
> config
> > directories of their dependent libraries, as suggested by lilyp.
> > 
> > [[End of PGP Signed Part]]
> 
> Not only for pkg-config files, but also for headers.
> 
> For example, the header of gtk4 may have following lines
> 
> #include <pango.h>

This is getting a little off-topic, but for headers, symlinking is not
necessary, pango.h could be automatically replaced by the absolute file
name /gnu/store/.../include/pango.h in gtk4's header, see attachement.
(Idea suggested by lilyp on IRC).  It needs some more work though,
see TODO's and lack of documentation.

Greetings,
Maxime.