aclocal 1.9.5 is generating the following warning for orbit 0.5.17: /usr/share/aclocal/libIDL.m4:6: warning: underquoted definition of AM_PATH_LIBIDL
Created attachment 58592 [details, diff] patch fixes the warning
These are harmless warnings for unmaintained old versions and patching would just be a lot of effort for no gain.