***** autoconf *****
aclocal.m4:14: error: this file was generated for autoconf 2.61.
You have another version of autoconf. If you want to use that,
you should regenerate the build system entirely.
aclocal.m4:14: the top level
autom4te-2.63: /usr/bin/m4 failed with exit status: 63
The fix ebuild-side is to run eautoreconf, but the configure.ac is broken so it should be fixed first.
# Samuli Suominen <email@example.com> (25 Nov 2008)
# Cantus was moved to new upstream, but last modification
# in subversion is from 2007. Versions we have in tree,
# all fail on different errors. See bugs 205681 and 247831
# for example about latest version. Masked for removal
# in 30 days. Please try maintained media-sound/easytag.
Deleted from tree. We will readd Cantus if this new upstream gets something working released in the future.