These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 1.04 s (backtrack: 0/20).

[ebuild  N     ] media-libs/giflib-6.1.3:0/7::gentoo  USE="-doc -static-libs" 460 KiB
[ebuild  N     ] media-libs/devil-1.7.8-r6::gentoo  USE="X gif jpeg opengl png tiff -allegro -glut -mng -sdl -static-libs -xpm" CPU_FLAGS_X86="sse sse2 sse3" 2004 KiB

Total: 2 packages (2 new), Size of downloads: 2464 KiB