Installing kde-apps / kdiamond-21.08.1: 5 encountered a compilation error for media-libs/openal-1.19.1
emerge -av kdiamond

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

Calculating dependencies... done!
[ebuild N ] media-libs/openal-1.19.1::media-kit USE="alsa pulseaudio qt5 sdl (-coreaudio) -debug -jack -oss -portaudio" CPU_FLAGS_X86="sse sse2 -sse4_1" 0 KiB
[ebuild N ] kde-apps/libkdegames-21.08.1:5::kde-kit USE="-debug -test" 0 KiB
[ebuild N ] kde-apps/kdiamond-21.08.1:5::kde-kit USE="handbook -debug" 0 KiB