Gentoo's Bugzilla –
Attachment 843959 Details for
Bug 887333x11-drivers/xf86-video-openchrome-0.6.0 fails to compile (CLANG-STRICTER-SYSTEM): via_driver.c:1678:45: error: incompatible integer to pointer conversion passing int to parameter of type ShadowUpdateProc (aka void ()(struct _Screen , struct _shadowBuf ))