configure: error: OpenGL libraries not available

!!! Please attach the following file when filing a report to bugs.gentoo.org:
!!! /var/tmp/portage/x11-libs/wxGTK-2.6.3.3/work/wxPython-src-2.6.3.3/gtk2_build/config.log

!!! ERROR: x11-libs/wxGTK-2.6.3.3 failed.
Call stack:
  ebuild.sh, line 1615:   Called dyn_compile
  ebuild.sh, line 972:   Called qa_call 'src_compile'
  ebuild.sh, line 44:   Called src_compile
  wxGTK-2.6.3.3.ebuild, line 145:   Called configure_build 'gtk2' 'unicode' '
                --without-sdl
                --disable-joystick
                        --enable-opengl
                        --with-opengl
                        --with-gnomeprint --with-gtk=2'
  wxGTK-2.6.3.3.ebuild, line 60:   Called subconfigure '--without-sdl' '--disable-joystick' '--enable-opengl' '--with-opengl' '--with-gnomeprint' '--with-gtk=2' '--without-odbc'
  wxGTK-2.6.3.3.ebuild, line 85:   Called econf '--with-zlib' '--disable-debug' '--disable-debug_gdb' '--without-sdl' '--disable-joystick' '--enable-opengl' '--with-opengl' '--with-gnomeprint' '--with-gtk=2' '--without-odbc'
  ebuild.sh, line 578:   Called die

!!! econf failed
!!! If you need support, post the topmost build error, and the call stack if relevant.
!!! A complete build log is located at '/var/tmp/portage/x11-libs/wxGTK-2.6.3.3/temp/build.log'.