If you're running into this warning that later results in a build error:
/usr/bin/ld: warning: libfmt.so.12, needed by /usr/lib/libspdlog.so.1.17.0, may conflict with libfmt.so.9
Run pacman -Qs libfmt and notice that you have two libfmt versions installed. Remove libfmt9 (and packages that depend on it) and try building again.
Pinned Comments
Radioactiveman commented on 2020-06-02 17:17 (UTC)
If you experience the problem below when updating packages, first remove
mumble-git, then update all packages includingprotobufand finally compilemumble-gitagain.