Created attachment 665188 [details] build.log On musl systems, xorg-server fails to compile due to missing execinfo.h normally provided by glibc. The xorg-server ebuild currently in the musl overlay depends on eselect-opengl which has been removed from the tree in favor of libglvnd.
Created attachment 665191 [details] emerge-info
Created attachment 665194 [details] emerge-pqv
This error does not occur for 1.20.8-r1 which is now stabilized. Considering this resolved.