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Cross compile opencv build fails for aarch64 targets

asked 2017-10-23 19:55:31 -0500

gbista gravatar image

updated 2017-10-24 13:08:22 -0500

I'm trying to build OpenCV for aarch64 system and below is my cmake command. Any idea how to resolve this error ?

 gbista@gbista-Precision-7510:~/cods/dl_platform/dpx2/build$ cmake -DSOFTFP=ON -DBUILD_SHARED_LIBS=OFF -DINSTALL_C_EXAMPLES=OFF -DWITH_V4L=OFF  -DCMAKE_C_COMPILER=/usr/bin/aarch64-linux-gnu-gcc -DCMAKE_CXX_COMPILER=/usr/bin/aarch64-linux-gnu-g++ -DCMAKE_TOOLCHAIN_FILE=/home/gbista/cods/dl_platform/dpx2/opensrc/opencv-3.3.0/platforms/linux/aarch64-gnu.toolchain.cmake /home/gbista/cods/dl_platform/dpx2/opensrc/opencv-3.3.0

-- The CXX compiler identification is GNU 4.8.4
-- The C compiler identification is GNU 4.8.4
-- Check for working CXX compiler: /usr/bin/aarch64-linux-gnu-g++
-- Check for working CXX compiler: /usr/bin/aarch64-linux-gnu-g++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Check for working C compiler: /usr/bin/aarch64-linux-gnu-gcc
-- Check for working C compiler: /usr/bin/aarch64-linux-gnu-gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Detected version of GNU GCC: 48 (408)
-- Performing Test HAVE_CXX11 (check file: cmake/checks/cxx11.cpp)
-- Performing Test HAVE_CXX11 - Failed
-- Found PythonInterp: /usr/bin/python2.7 (found suitable version "2.7.6", minimum required is "2.7") 
-- Could NOT find PythonLibs (missing:  PYTHON_LIBRARIES PYTHON_INCLUDE_DIRS) (Required is at least version "2.7")
-- Cannot probe for Python/Numpy support (because we are cross-compiling OpenCV)
-- If you want to enable Python/Numpy support, set the following variables:
--   PYTHON2_INCLUDE_PATH
--   PYTHON2_LIBRARIES (optional on Unix-like systems)
--   PYTHON2_NUMPY_INCLUDE_DIRS
--   PYTHON3_INCLUDE_PATH
--   PYTHON3_LIBRARIES (optional on Unix-like systems)
--   PYTHON3_NUMPY_INCLUDE_DIRS
-- Found PythonInterp: /usr/bin/python3.4 (found suitable version "3.4.3", minimum required is "3.4") 
-- Could NOT find PythonLibs (missing:  PYTHON_LIBRARIES PYTHON_INCLUDE_DIRS) (Required is at least version "3.4")
-- Cannot probe for Python/Numpy support (because we are cross-compiling OpenCV)
-- If you want to enable Python/Numpy support, set the following variables:
--   PYTHON2_INCLUDE_PATH
--   PYTHON2_LIBRARIES (optional on Unix-like systems)
--   PYTHON2_NUMPY_INCLUDE_DIRS
--   PYTHON3_INCLUDE_PATH
--   PYTHON3_LIBRARIES (optional on Unix-like systems)
--   PYTHON3_NUMPY_INCLUDE_DIRS
-- Looking for ccache - not found
-- Performing Test HAVE_CXX_FSIGNED_CHAR
-- Performing Test HAVE_CXX_FSIGNED_CHAR - Success
-- Performing Test HAVE_C_FSIGNED_CHAR
-- Performing Test HAVE_C_FSIGNED_CHAR - Success
-- Performing Test HAVE_CXX_W
-- Performing Test HAVE_CXX_W - Success
-- Performing Test HAVE_C_W
-- Performing Test HAVE_C_W - Success
-- Performing Test HAVE_CXX_WALL
-- Performing Test HAVE_CXX_WALL - Success
-- Performing Test HAVE_C_WALL
-- Performing Test HAVE_C_WALL - Success
-- Performing Test HAVE_CXX_WERROR_RETURN_TYPE
-- Performing Test HAVE_CXX_WERROR_RETURN_TYPE - Success
-- Performing Test HAVE_C_WERROR_RETURN_TYPE
-- Performing Test HAVE_C_WERROR_RETURN_TYPE - Success
-- Performing Test HAVE_CXX_WERROR_NON_VIRTUAL_DTOR
-- Performing Test HAVE_CXX_WERROR_NON_VIRTUAL_DTOR - Success
-- Performing Test HAVE_C_WERROR_NON_VIRTUAL_DTOR
-- Performing Test HAVE_C_WERROR_NON_VIRTUAL_DTOR - Success
-- Performing Test HAVE_CXX_WERROR_ADDRESS
-- Performing Test HAVE_CXX_WERROR_ADDRESS - Success
-- Performing Test HAVE_C_WERROR_ADDRESS
-- Performing Test HAVE_C_WERROR_ADDRESS - Success
-- Performing Test HAVE_CXX_WERROR_SEQUENCE_POINT
-- Performing Test HAVE_CXX_WERROR_SEQUENCE_POINT - Success
-- Performing Test HAVE_C_WERROR_SEQUENCE_POINT
-- Performing Test HAVE_C_WERROR_SEQUENCE_POINT - Success
-- Performing Test HAVE_CXX_WFORMAT
-- Performing Test HAVE_CXX_WFORMAT - Success
-- Performing Test HAVE_C_WFORMAT
-- Performing Test HAVE_C_WFORMAT - Success
-- Performing Test HAVE_CXX_WERROR_FORMAT_SECURITY
-- Performing Test HAVE_CXX_WERROR_FORMAT_SECURITY - Success
-- Performing Test HAVE_C_WERROR_FORMAT_SECURITY
-- Performing Test HAVE_C_WERROR_FORMAT_SECURITY - Success
-- Performing Test HAVE_CXX_WMISSING_DECLARATIONS
-- Performing Test HAVE_CXX_WMISSING_DECLARATIONS - Success
-- Performing Test HAVE_C_WMISSING_DECLARATIONS
-- Performing Test HAVE_C_WMISSING_DECLARATIONS - Success
-- Performing Test HAVE_CXX_WMISSING_PROTOTYPES
-- Performing Test HAVE_CXX_WMISSING_PROTOTYPES - Failed
-- Performing Test HAVE_C_WMISSING_PROTOTYPES
-- Performing Test HAVE_C_WMISSING_PROTOTYPES - Success
-- Performing Test HAVE_CXX_WSTRICT_PROTOTYPES
-- Performing Test HAVE_CXX_WSTRICT_PROTOTYPES - Failed
-- Performing Test HAVE_C_WSTRICT_PROTOTYPES
-- Performing Test HAVE_C_WSTRICT_PROTOTYPES - Success
-- Performing Test HAVE_CXX_WUNDEF
-- Performing Test HAVE_CXX_WUNDEF - Success
-- Performing Test HAVE_C_WUNDEF ...
(more)
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Comments

i don't have any remedy, but the problem is here:

-- Performing Test HAVE_CPU_FP16_SUPPORT - Failed
-- FP16 is not supported by C++ compiler
CMake Error at cmake/OpenCVCompilerOptimizations.cmake:399 (message):
  Required baseline optimization is not supported: NEON
  (CPU_BASELINE_REQUIRE=;NEON)
Call Stack (most recent call first):
  cmake/OpenCVCompilerOptions.cmake:260 (include)
  CMakeLists.txt:529 (include)
berak gravatar imageberak ( 2017-10-24 13:24:41 -0500 )edit

Thanks I will take a look.

gbista gravatar imagegbista ( 2017-10-24 13:26:21 -0500 )edit

Cross compiling can be annoying. I prefer to compile OpenCV on the platform I'll use it. It's quite fast on ARM processors too.

kbarni gravatar imagekbarni ( 2019-06-20 04:26:27 -0500 )edit

2 answers

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answered 2019-06-24 04:08:38 -0500

yelin gravatar image

Maybe I solved it temporarily by defining CV_NEON,just like :

image description

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answered 2019-06-18 12:19:45 -0500

iliis gravatar image

The underlying issue is that gcc 4.8 doesn't define __ARM_NEON(4.9 does), so the check in https://github.com/opencv/opencv/blob... fails. I tried to remove this but then ran into other issues (undefined macro UINT64_C in the arm_neon.h header of my toolchain).

I strongly recommend to update your toolchain if at all possible. For the Nvidia boards you should be able to use the toolchain provided by Linaro at https://www.linaro.org/downloads/

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Asked: 2017-10-23 19:55:31 -0500

Seen: 781 times

Last updated: Jun 18