$ equery u wine-vanilla
[ Legend : U - final flag setting for installation]
[        : I - package is installed with flag     ]
[ Colors : set, unset                             ]
 * Found these USE flags for app-emulation/wine-vanilla-4.0:
 U I
 + + X             : Add support for X11
 + + abi_x86_32    : 32-bit (x86) libraries
 + + abi_x86_64    : 64-bit (amd64) libraries
 + + alsa          : Add support for media-libs/alsa-lib (Advanced Linux Sound Architecture)
 - - capi          : Enable ISDN support via CAPI
 + + cups          : Add support for CUPS (Common Unix Printing System)
 - - custom-cflags : Bypass strip-flags; use at your own peril
 - - dos           : Pull in games-emulation/dosbox to run DOS applications
 + + fontconfig    : Support for configuring and customizing font access via media-libs/fontconfig
 + + gecko         : Add support for the Gecko engine when using iexplore
 - - gphoto2       : Add digital camera support
 - - gsm           : Add support for the gsm lossy speech compression codec
 - - gssapi        : Use GSSAPI (Kerberos SSP support)
 - - gstreamer     : Use media-libs/gstreamer to provide DirectShow functionality;
 + + jpeg          : Add JPEG image support
 - - kerberos      : Add kerberos support
 + + lcms          : Add lcms support (color management engine)
 + + ldap          : Add LDAP support (Lightweight Directory Access Protocol)
 + + mono          : Add support for .NET using Wine's Mono add-on
 + + mp3           : Add support for reading mp3 files
 + + ncurses       : Add ncurses support (console display library)
 + + netapi        : Use libnetapi from net-fs/samba to support Windows networks in netapi32.dll
 + + nls           : Add Native Language Support (using gettext - GNU locale utilities)
 - - odbc          : Add ODBC Support (Open DataBase Connectivity)
 - - openal        : Add support for the Open Audio Library
 - - opencl        : Enable OpenCL support
 + + opengl        : Add support for OpenGL (3D graphics)
 - - osmesa        : Add support for OpenGL in bitmaps using libOSMesa
 - - oss           : Add support for OSS (Open Sound System)
 - - pcap          : Support packet capture software (e.g. wireshark)
 - - perl          : Install helpers written in perl (winedump/winemaker)
 + + png           : Add support for libpng (PNG images)
 + + prelink       : Run prelink on DLLs during build; For Gentoo hardened, do not disable if you do not know what this means as it
                     can break things at runtime
 + + pulseaudio    : Add support for PulseAudio sound server
 + + realtime      : Pull in sys-auth/rtkit for low-latency pulseaudio support
 + + run-exes      : Use Wine to open and run .EXE and .MSI files
 + + samba         : Add support for NTLM auth. See:
                     https://web.archive.org/web/20160108123008/http://wiki.winehq.org:80/NtlmAuthSetupGuide and
                     https://web.archive.org/web/20150906013746/http://wiki.winehq.org/NtlmSigningAndSealing (these pages are not
                     currently in the updated WineHQ Wiki).
 + + scanner       : Add support for scanner hardware (e.g. build the sane frontend in kdegraphics)
 + + sdl           : Add support for gamepad detection using SDL
 + + ssl           : Add support for SSL/TLS connections (Secure Socket Layer / Transport Layer Security)
 - - test          : Enable dependencies and/or preparations necessary to run tests (usually controlled by FEATURES=test but can be
                     toggled independently)
 + + threads       : Add threads support for various packages. Usually pthreads
 + + truetype      : Add support for FreeType and/or FreeType2 fonts
 + + udev          : Use virtual/libudev to provide plug and play support
 + + udisks        : Enable storage management support (automounting, volume monitoring, etc)
 + + v4l           : Enable support for video4linux (using linux-headers or userspace libv4l libraries)
 - - vkd3d         : Use app-emulation/vkd3d to provide Direct3D 12 support
 - - vulkan        : Enable Vulkan drivers
 + + xcomposite    : Enable support for the Xorg composite extension
 + + xinerama      : Add support for querying multi-monitor screen geometry through the Xinerama API
 + + xml           : Add support for XML files