更新系统时，出现opengl错误？请问怎么解决！

[pang15975386]

OpenGL disabled.
The OpenGL functionality test failed!
You might need to modify the include and library search paths by editing
QMAKE_INCDIR_OPENGL, QMAKE_LIBDIR_OPENGL and QMAKE_LIBS_OPENGL in
/var/tmp/portage/dev-qt/qtopengl-5.5.1/work/qtbase-opensource-src-5.5.1/mkspecs/linux-g++.

* ERROR: dev-qt/qtopengl-5.5.1::gentoo failed (configure phase):
* configure failed
*
* Call stack:
* ebuild.sh, line 133: Called src_configure
* environment, line 2710: Called qt5-build_src_configure
* environment, line 2312: Called qt5_base_configure
* environment, line 2430: Called die
* The specific snippet of code:
* "${S}"/configure "${conf[@]}" || die "configure failed";
*
* If you need support, post the output of `emerge --info '=dev-qt/qtopengl-5.5.1::gentoo'`,
* the complete build log and the output of `emerge -pqv '=dev-qt/qtopengl-5.5.1::gentoo'`.
* The complete build log is located at '/var/tmp/portage/dev-qt/qtopengl-5.5.1/temp/build.log'.
* The ebuild environment file is located at '/var/tmp/portage/dev-qt/qtopengl-5.5.1/temp/environment'.
* Working directory: '/var/tmp/portage/dev-qt/qtopengl-5.5.1/work/qtbase-opensource-src-5.5.1'
* S: '/var/tmp/portage/dev-qt/qtopengl-5.5.1/work/qtbase-opensource-src-5.5.1'

>>> Failed to emerge dev-qt/qtopengl-5.5.1, Log file:

>>> '/var/tmp/portage/dev-qt/qtopengl-5.5.1/temp/build.log'

* Messages for package dev-qt/qtopengl-5.5.1:

* ERROR: dev-qt/qtopengl-5.5.1::gentoo failed (configure phase):
* configure failed
*
* Call stack:
* ebuild.sh, line 133: Called src_configure
* environment, line 2710: Called qt5-build_src_configure
* environment, line 2312: Called qt5_base_configure
* environment, line 2430: Called die
* The specific snippet of code:
* "${S}"/configure "${conf[@]}" || die "configure failed";
*
* If you need support, post the output of `emerge --info '=dev-qt/qtopengl-5.5.1::gentoo'`,
* the complete build log and the output of `emerge -pqv '=dev-qt/qtopengl-5.5.1::gentoo'`.
* The complete build log is located at '/var/tmp/portage/dev-qt/qtopengl-5.5.1/temp/build.log'.
* The ebuild environment file is located at '/var/tmp/portage/dev-qt/qtopengl-5.5.1/temp/environment'.
* Working directory: '/var/tmp/portage/dev-qt/qtopengl-5.5.1/work/qtbase-opensource-src-5.5.1'
* S: '/var/tmp/portage/dev-qt/qtopengl-5.5.1/work/qtbase-opensource-src-5.5.1'

[pang15975386]

从论坛里找解决办法了，原来是和mesa有关
emerge -C mesa
emerge -avuDN @world