Hi! With the upcoming dpkg release, and its new hard dependency on libmd (depending on the system), if the project is linking against libdpkg, which is still a static library you might find it fails to build now.
For projects using autotools, you should be using PKG_CHECK_MODULES_STATIC instead of PKG_CHECK_MODULES. Otherwise you should be calling pkg-config manually (ideally behind a PKG_CONFIG variable that can be overridden). I checked the archive and only noticed three projects with this problem (deets for which I already sent MRs, which got merged and uploaded; debsig-verify, fixed in git, pending an upload; cruft-ng, for which I've submitted an MR). As I don't have further visibility on other users of the library, this is mostly a heads-up that your projects might break, and you might want to change the aforementioned macro usage or linking rules (assuming those users are reading this list of course :). Thanks, Guillem