Cross compile gnuradio in E312 error

[201922220115]

Dear friends:

     I'm installing rfnoc on E312, when I cross compile gnu radio, I execute this command：cmake -Wno-dev -DCMAKE_TOOLCHAIN_FILE=~/rfnoc/src/gnuradio/cmake/Toolchains/oe-sdk_cross.cmake -DENABLE_GR_WXGUI=OFF -DENABLE_GR_VOCODER=OFF -DENABLE_GR_DTV=OFF -DENABLE_GR_ATSC=OFF -DENABLE_DOXYGEN=OFF -DCMAKE_INSTALL_PREFIX=/usr ../

 It prompts the following error：

zcm@zcm-XPS-8500:~/rfnoc/src/gnuradio/build-arm$ cmake -Wno-dev -DCMAKE_TOOLCHAIN_FILE=~/rfnoc/src/gnuradio/cmake/Toolchains/oe-sdk_cross.cmake -DENABLE_GR_WXGUI=OFF -DENABLE_GR_VOCODER=OFF -DENABLE_GR_DTV=OFF -DENABLE_GR_ATSC=OFF -DENABLE_DOXYGEN=OFF -DCMAKE_INSTALL_PREFIX=/usr ../

-- Build type not specified: defaulting to release.

-- Build type set to Release.

-- Extracting version information from git describe...

-- Compiler Version: arm-oe-linux-gnueabi-gcc (GCC) 4.9.2

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