Created attachment 665005 [details] Build log Attempting to build during system upgrade [ebuild U ] dev-qt/qtgui-5.15.1-r1:5/5.15.1::gentoo [5.14.1-r4:5/5.14.1::gentoo] USE="X dbus egl gif jpeg libinput png udev vulkan* wayland* -accessibility -debug -eglfs -evdev -gles2-only -ibus -test -tslib -tuio -vnc" 0 KiB Failed on configure phase with ERROR: Feature 'opengl-desktop' was enabled, but the pre-condition '(config.win32 && !config.winrt && !features.opengles2 && (config.msvc || libs.opengl)) || (!config.watchos && !config.win32 && !config.wasm && libs.opengl)' failed. ERROR: Feature 'egl' was enabled, but the pre-condition '(features.opengl || features.openvg) && (features.angle || libs.egl) && (features.dlopen || !config.unix || config.integrity)' failed. ERROR: The OpenGL functionality tests failed! You might need to modify the include and library search paths by editing QMAKE_INCDIR_OPENGL[_ES2], QMAKE_LIBDIR_OPENGL[_ES2] and QMAKE_LIBS_OPENGL[_ES2] in the mkspec for your platform.
Created attachment 665008 [details] emerge environment
Created attachment 665011 [details] emerge --info
Created attachment 665014 [details] emerge -pqv
Solved problem localy. In my case nvidia-drivers should be updated prior to installing (possibly related to +wayland / libglvnd)
> undefined reference to `_glapi_tls_Current' Yes, not specific to qtgui and affects any opengl-using packages during libglvnd transition. Won't come back after nvidia-drivers is rebuilt. See bug #739900 for details.
*** This bug has been marked as a duplicate of bug 739900 ***