Ebuild 9999 has a missing or malformed copyright/licensing header.
[Error] Ebuild 9999 uses an obsolete EAPI '4'. EAPIs 0 to 4 are obsolete and must no longer be used.
[Notice] Ebuild 9999 has an invalid header. It should start with a valid copyright line (e.g., '# Copyright YEARS MAIN-CONTRIBUTOR') and the GPLv2 distribution text followed by an empty line.
[Warning] Ebuild 9999 has a line exceeding 80 positions on line 2.
[Error] Ebuild 9999 does not specify LICENSE
[Warning] Ebuild 9999 is missing HOMEPAGE
[Error] Repository is missing a repo-name in metadata/layout.conf or profiles/repo_name
[Error] Invalid or missing metadata.xml: open media-gfx/slideshow/metadata.xml: file does not exist