Emacs gpr-query version 1.0.2 gpr-query provides an emacs xref backend using the cross-reference information output by the AdaCore GNAT compiler. gpr-query uses a separate executable provided as Ada source code that must be compiled and installed, either directly or using the Alire package tool: cd ~/.emacs.d/elpa/gpr-query-i.j.k ./build.sh ./install.sh install.sh can take an option "--prefix=" to set the installation directory. Both shell scripts use Alire if the 'alr' executable is found in PATH. See gpr-query.info section Installation for more information on installing; if not using Alire, you may need additional packages.