>>> libmatroska 1.4.9 Extracting
xzcat /data/buildroot/buildroot-test/instance-0/dl/libmatroska/libmatroska-1.4.9.tar.xz | /data/buildroot/buildroot-test/instance-0/output/host/bin/tar --strip-components=1 -C /data/buildroot/buildroot-test/instance-0/output/build/libmatroska-1.4.9   -xf -
>>> libmatroska 1.4.9 Patching
>>> libmatroska 1.4.9 Configuring
(mkdir -p /data/buildroot/buildroot-test/instance-0/output/build/libmatroska-1.4.9/ && cd /data/buildroot/buildroot-test/instance-0/output/build/libmatroska-1.4.9/ && rm -f CMakeCache.txt && PATH="/data/buildroot/buildroot-test/instance-0/output/host/bin:/data/buildroot/buildroot-test/instance-0/output/host/sbin:/data/buildroot/buildroot-test/venv/bin:/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/bin/site_perl:/usr/bin/vendor_perl:/usr/bin/core_perl"  /data/buildroot/buildroot-test/instance-0/output/host/bin/cmake /data/buildroot/buildroot-test/instance-0/output/build/libmatroska-1.4.9/ -DCMAKE_TOOLCHAIN_FILE="/data/buildroot/buildroot-test/instance-0/output/host/share/buildroot/toolchainfile.cmake" -DCMAKE_INSTALL_PREFIX="/usr" -DCMAKE_COLOR_MAKEFILE=OFF -DBUILD_DOC=OFF -DBUILD_DOCS=OFF -DBUILD_EXAMPLE=OFF -DBUILD_EXAMPLES=OFF -DBUILD_TEST=OFF -DBUILD_TESTS=OFF -DBUILD_TESTING=OFF -DBUILD_SHARED_LIBS=ON   )
-- The C compiler identification is GNU 7.4.0
-- The CXX compiler identification is GNU 7.4.0
-- Check for working C compiler: /data/buildroot/buildroot-test/instance-0/output/host/bin/x86_64-linux-gcc
-- Check for working C compiler: /data/buildroot/buildroot-test/instance-0/output/host/bin/x86_64-linux-gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /data/buildroot/buildroot-test/instance-0/output/host/bin/x86_64-linux-g++
-- Check for working CXX compiler: /data/buildroot/buildroot-test/instance-0/output/host/bin/x86_64-linux-g++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
CMake Error at CMakeLists.txt:9 (find_package):
  By not providing "FindEbml.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "Ebml", but
  CMake did not find one.

  Could not find a package configuration file provided by "Ebml" (requested
  version 1.3.5) with any of the following names:

    EbmlConfig.cmake
    ebml-config.cmake

  Add the installation prefix of "Ebml" to CMAKE_PREFIX_PATH or set
  "Ebml_DIR" to a directory containing one of the above files.  If "Ebml"
  provides a separate development package or SDK, be sure it has been
  installed.


-- Configuring incomplete, errors occurred!
See also "/data/buildroot/buildroot-test/instance-0/output/build/libmatroska-1.4.9/CMakeFiles/CMakeOutput.log".
make: *** [package/pkg-generic.mk:231: /data/buildroot/buildroot-test/instance-0/output/build/libmatroska-1.4.9/.stamp_configured] Error 1
make: Leaving directory '/data/buildroot/buildroot-test/instance-0/buildroot'