-- Found PNG: /usr/lib64/libpng.so (found version "1.6.37") 
-- Looking for /usr/include/libpng/png.h
-- Looking for /usr/include/libpng/png.h - found
CMake Error at cmake/OpenCVFindLibsGUI.cmake:17 (find_package):
  Could not find a package configuration file provided by "Qt5" with any of
  the following names:

    Qt5Config.cmake
    qt5-config.cmake

  Add the installation prefix of "Qt5" to CMAKE_PREFIX_PATH or set "Qt5_DIR"
  to a directory containing one of the above files.  If "Qt5" provides a
  separate development package or SDK, be sure it has been installed.
Call Stack (most recent call first):
  cmake/OpenCVFindLibsGUI.cmake:42 (ocv_find_package_Qt)
  CMakeLists.txt:730 (include)


-- Configuring incomplete, errors occurred!
See also "/var/calculate/tmp/portage/media-libs/opencv-4.5.5-r1/work/opencv-4.5.5_build-abi_x86_64.amd64/CMakeFiles/CMakeOutput.log".
See also "/var/calculate/tmp/portage/media-libs/opencv-4.5.5-r1/work/opencv-4.5.5_build-abi_x86_64.amd64/CMakeFiles/CMakeError.log".
 * ERROR: media-libs/opencv-4.5.5-r1::gentoo failed (configure phase):
 *   cmake failed
 * 
 * Call stack:
 *     ebuild.sh, line  127:  Called src_configure
 *   environment, line 5785:  Called cmake-multilib_src_configure
 *   environment, line 1508:  Called multilib-minimal_src_configure
 *   environment, line 4512:  Called multilib_foreach_abi 'multilib-minimal_abi_src_configure'
 *   environment, line 4762:  Called multibuild_foreach_variant '_multilib_multibuild_wrapper' 'multilib-minimal_abi_src_configure'
 *   environment, line 4467:  Called _multibuild_run '_multilib_multibuild_wrapper' 'multilib-minimal_abi_src_configure'
 *   environment, line 4465:  Called _multilib_multibuild_wrapper 'multilib-minimal_abi_src_configure'
 *   environment, line  765:  Called multilib-minimal_abi_src_configure
 *   environment, line 4506:  Called multilib_src_configure
 *   environment, line 4997:  Called cmake_src_configure
 *   environment, line 1769:  Called die
 * The specific snippet of code:
 *       "${CMAKE_BINARY}" "${cmakeargs[@]}" "${CMAKE_USE_DIR}" || die "cmake failed";
 * 
 * If you need support, post the output of `emerge --info '=media-libs/opencv-4.5.5-r1::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=media-libs/opencv-4.5.5-r1::gentoo'`.
!!! When you file a bug report, please include the following information:
GENTOO_VM=  CLASSPATH="" JAVA_HOME="/etc/java-config-2/current-system-vm"
JAVACFLAGS="" COMPILER=""
and of course, the output of emerge --info =opencv-4.5.5
 * The complete build log is located at '/var/calculate/tmp/portage/media-libs/opencv-4.5.5-r1/temp/build.log'.
 * The ebuild environment file is located at '/var/calculate/tmp/portage/media-libs/opencv-4.5.5-r1/temp/environment'.
 * Working directory: '/var/calculate/tmp/portage/media-libs/opencv-4.5.5-r1/work/opencv-4.5.5_build-abi_x86_64.amd64'
 * S: '/var/calculate/tmp/portage/media-libs/opencv-4.5.5-r1/work/opencv-4.5.5'

 * Messages for package media-libs/opencv-4.5.5-r1:

 * ERROR: media-libs/opencv-4.5.5-r1::gentoo failed (configure phase):
 *   cmake failed
 * 
 * Call stack:
 *     ebuild.sh, line  127:  Called src_configure
 *   environment, line 5785:  Called cmake-multilib_src_configure
 *   environment, line 1508:  Called multilib-minimal_src_configure
 *   environment, line 4512:  Called multilib_foreach_abi 'multilib-minimal_abi_src_configure'
 *   environment, line 4762:  Called multibuild_foreach_variant '_multilib_multibuild_wrapper' 'multilib-minimal_abi_src_configure'
 *   environment, line 4467:  Called _multibuild_run '_multilib_multibuild_wrapper' 'multilib-minimal_abi_src_configure'
 *   environment, line 4465:  Called _multilib_multibuild_wrapper 'multilib-minimal_abi_src_configure'
 *   environment, line  765:  Called multilib-minimal_abi_src_configure
 *   environment, line 4506:  Called multilib_src_configure
 *   environment, line 4997:  Called cmake_src_configure
 *   environment, line 1769:  Called die
 * The specific snippet of code:
 *       "${CMAKE_BINARY}" "${cmakeargs[@]}" "${CMAKE_USE_DIR}" || die "cmake failed";
 * 
 * If you need support, post the output of `emerge --info '=media-libs/opencv-4.5.5-r1::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=media-libs/opencv-4.5.5-r1::gentoo'`.
 * The complete build log is located at '/var/calculate/tmp/portage/media-libs/opencv-4.5.5-r1/temp/build.log'.
 * The ebuild environment file is located at '/var/calculate/tmp/portage/media-libs/opencv-4.5.5-r1/temp/environment'.
 * Working directory: '/var/calculate/tmp/portage/media-libs/opencv-4.5.5-r1/work/opencv-4.5.5_build-abi_x86_64.amd64'
 * S: '/var/calculate/tmp/portage/media-libs/opencv-4.5.5-r1/work/opencv-4.5.5'