I am using a 2006.1 gentoo install newly installed off of the livecd. I tried to do an emerge mythtv and it failed looking for the file "/usr/include/X11/extensions/Xinerama.h". The xineramaproto ebuild provides this file, so it looks to me that mythtv requires xineramaproto as a dependency. Similarly, I had this problem with xf86vmode.h, requiring me to emerge x11-proto/xf86vidmodeproto. After emerging those two packages, MythTV compiled without problems. -Ray
Fixed in mythtv-0.20_p12884