(cross-posting from the Gentoo forum)I try editing the .eclass file in order to correct the error, but it seems my edits are being defeated by a cache somewhere.  The initial error occurs when I run the command emerge --config =dev-db/mysql-5.7.12, which I must do in order to finish installing my build of MySQL.  The command fails and /var/log/mysql/mysqld.err says:[ERROR] Too many arguments (first extra is  ''--init-file=/var/tmp/portage/dev-db/mysql-5.7.12/temp/tmp.COaXRiJpf9'').I traced it to a file named mysql-multilib-r1.eclass.  I found two versions of this file on my system; one in the main Gentoo repository (priority -1000) under /usr/portage/eclass/, and the other in the overlay repository (+50).  The overlay repository is maintained by Layman and the name of the overlay is mysql.  Im using it to gain access to MySQL 5.7, which hasnt arrived in the main repository yet.  Specifically I traced the error to line 953 in the overlay version of the file, or 945 in the main version:initialize_options=--initialize-insecure  '--init-file=${sqltmp}'Probably the single quotes are causing the --init-file option to be interpreted as a proper argument.  I just need to remove them.  But when I do, it has no effect.  My edits to this file  no matter which version I edit  are ignored.  Ive been careful to delete the contents of /var/tmp/portage in case its caching there.  I also tried synchronizing the repositories:layman --sync ALLemerge --syncI tried synchronizing them before editing the two versions of the file, and also after editing  in this case clobbering my edits to the main version but (oddly) not the overlay version.  Neither helped.The Gentoo developer manual suggests that I might need to manually touch all relevant overlay files after updating overlay eclasses.  I tried doing that, too; touching all files under these directories:/usr/portage/dev-db/usr/portage/eclass/usr/portage/virtual/mysql/var/lib/layman/mysql/dev-db/var/lib/layman/mysql/eclass/var/lib/layman/mysql/metadata/var/lib/layman/mysql/profiles/var/lib/layman/mysql/virtualWhen I next ran the emerge command, it began by outputting:Performing Global Updates(Could take a couple of minutes if you have a lot of binary packages.)  .='update pass'  *='binary update'  #='/var/db update'  @='/var/db move'  s='/var/db SLOT move'  %='binary move'  S='binary SLOT move'  p='update /etc/portage/package.*'/var/lib/layman/mysql/profiles/updates/3Q-2014.But still my edits were ignored.  How can I edit this .eclass file so that my edits actually take effect?  Or how else can I work around an error like this?
How to work around a error in an eclass file located in a Gentoo overlay?
mysql;gentoo;emerge;portage