Created attachment 475400 [details, diff] gcc 6.3 patch mythtv (<0.28.1) doesn't compile with (at least) gcc 6.3 without applying this patch. https://code.mythtv.org/trac/ticket/12764
Thank you
PR: https://github.com/gentoo/gentoo/pull/5123
0.28.1 is now in tree with this bug fixed. 0.27 is likely going to be removed well ahead of gcc-6.3 stable.