USE-флаги для mesa-7.11

http://www.gentoo.org/dyn/use-index.xml

 % equery u mesa
[ Legend : U - final flag setting for installation]
[        : I - package is installed with flag     ]
[ Colors : set, unset                             ]
 * Found these USE flags for media-libs/mesa-7.11:
 U I
 - - bindist             : Flag to enable or disable options
                           for prebuilt (GRP)  packages (eg.
                           due to licensing issues)
 - - classic             : Build drivers based on the
                           classic architecture.
 - - debug               : Enable extra debug codepaths,
                           like asserts and extra output. If
                           you want to get meaningful
                           backtraces see http://www.gentoo.
                           org/proj/en/qa/backtraces.xml
 + + egl                 : Enable EGL support.
 + + gallium             : Build drivers based on Gallium3D,
                           the new architecture for 3D
                           graphics drivers.
 - - gbm                 : Enable the Graphics Buffer
                           Manager for EGL on KMS.
 + + gles                : Enable GLES support.
 + + llvm                : Enable LLVM backend for
                           Gallium3D.
 - - motif               : Adds support for the Motif
                           toolkit
 + + nptl                : Enable support for Native POSIX
                           Threads Library, the new
                           threading module (requires
                           linux-2.6 or better usually)
 - - openvg              : Enable the OpenVG 2D acceleration
                           API for Gallium3D.
 - - pax_kernel          : Enable if the user plans to run
                           the package under a pax enabled
                           hardened kernel
 - - pic                 : disable optimized assembly code
                           that is not PIC friendly
 - - shared-dricore      : Enable sharing of common code for
                           classic DRI drivers.
 + + shared-glapi        : Enable sharing of common code for
                           the OpenGL API.

Ага, отлично, а теперь объясните, к примеру, значения egl, gles и llvm на основе данных из equery. Потом что информация о том, что флаг egl включает EGL нифига не является полезной.

http://www.linux.org.ru/forum/desktop/6520847
http://www.gentoo.ru/node/23889