I have a mfcl3770 and it wouldn't print due to a broken simlink:
/usr/libexce/cups/filter/brother_lpdwrapper_mfcl3770cdw -> /var/tmp/portage/net-print/brother-mfcl3770cdw-bin-1.0.2-r1/image/opt/brother/Printers/mfcl3770cdw/cupswrapper/brother_lpdwrapper_mfcl3770cdw
I was able to fix my printer by updating the symlink. I found several other printers in the repo appeared to have a similar issue, so I updated them as well.
I have a mfcl3770 and it wouldn't print due to a broken simlink: /usr/libexce/cups/filter/brother_lpdwrapper_mfcl3770cdw -> /var/tmp/portage/net-print/brother-mfcl3770cdw-bin-1.0.2-r1/image/opt/brother/Printers/mfcl3770cdw/cupswrapper/brother_lpdwrapper_mfcl3770cdw
I was able to fix my printer by updating the symlink. I found several other printers in the repo appeared to have a similar issue, so I updated them as well.