A definition for KCHMIconStorage in iconstorage.h const QPixmap * KCHMIconStorage::getCloseWindowIcon(); makes it impossible to compile this on gcc-4
Created attachment 84111 [details, diff] Patch to make this compile with gcc-4
Created attachment 84112 [details] kchmviewer-2.5.ebuild
Created attachment 84115 [details] kchmviewer-2.5.ebuild to use with patch updated syntax
Patch added to 2.5 ebuild, thanks for reporting. Please send it upstream so that next versions will work out of the box.