ammy log $ equery u libdrm
[ Legend : U - final flag setting for installation]
[        : I - package is installed with flag     ]
[ Colors : set, unset                             ]
 * Found these USE flags for x11-libs/libdrm-2.4.71:
 U I
 + + abi_x86_32          : 32-bit (x86) libraries
 + + libkms              : Enable building of libkms, a library for applications to interface with KMS
 - - static-libs         : Build static versions of dynamic libraries as well
 - - valgrind            : Compile in valgrind memory hints
 - - video_cards_amdgpu  : VIDEO_CARDS setting to build driver for AMDGPU video cards
 + + video_cards_intel   : VIDEO_CARDS setting to build driver for Intel video cards
 - - video_cards_nouveau : VIDEO_CARDS setting to build reverse-engineered driver for nvidia cards
 - - video_cards_radeon  : VIDEO_CARDS setting to build driver for ATI radeon video cards
 - - video_cards_vmware  : VIDEO_CARDS setting to build driver for vmware video cards