opencv recipe build error

[Fak3]

I tried to build distro with opencv, but got an error

$ p4a create  --dist_name=testpygame --bootstrap=pygame --requirements=pygame,openssl,opencv,setuptools,python2,tinydb

...
[INFO]:    Building opencv for armeabi
[INFO]:    -> directory context /home/u1/.local/share/python-for-android/build/other_builds/opencv/armeabi/opencv
('path is', '/home/z/soft/android-ndk-r12b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86/bin/:/home/z/soft/android-ndk-r12b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/:/home/z/soft/android-ndk-r12b:/home/u1/Android/Sdk/tools:/usr/local/heroku/bin:/home/u1/.local/bin:/usr/local/heroku/bin:/home/u1/.local/bin:/home/u1/bin:/usr/local/bin:/usr/bin:/bin:/usr/bin/X11:/usr/games:/opt/kde3/bin:/usr/lib/mit/bin:/usr/lib/mit/sbin:.:/usr/sbin:/usr/sbin')
[INFO]:    -> running cmake -DP4A=ON -DANDROID_ABI=armeabi -DCMAKE_TOOLCHAIN_FILE=/home/u1/.local/share/python-for-android/build/other_builds/opencv/armeabi/opencv/platforms/android/an...(and 748 more)
Traceback (most recent call last):                                                                                                                                                                                 
  File "/usr/bin/p4a", line 9, in <module>
    load_entry_point('python-for-android==0.4', 'console_scripts', 'p4a')()
  File "/usr/lib/python2.7/site-packages/pythonforandroid/toolchain.py", line 790, in main
    ToolchainCL()
  File "/usr/lib/python2.7/site-packages/pythonforandroid/toolchain.py", line 464, in __init__
    getattr(self, args.subparser_name.replace('-', '_'))(args)
  File "/usr/lib/python2.7/site-packages/pythonforandroid/toolchain.py", line 145, in wrapper_func
    build_dist_from_args(ctx, dist, args)
  File "/usr/lib/python2.7/site-packages/pythonforandroid/toolchain.py", line 188, in build_dist_from_args
    build_recipes(build_order, python_modules, ctx)
  File "/usr/lib/python2.7/site-packages/pythonforandroid/build.py", line 561, in build_recipes
    recipe.build_arch(arch)
  File "/usr/lib/python2.7/site-packages/pythonforandroid/recipes/opencv/__init__.py", line 52, in build_arch
    _env=env)
  File "/usr/lib/python2.7/site-packages/pythonforandroid/logger.py", line 173, in shprint
    for line in output:
  File "/usr/lib/python2.7/site-packages/sh.py", line 565, in next
    self.wait()
  File "/usr/lib/python2.7/site-packages/sh.py", line 500, in wait
    self.handle_command_exit_code(exit_code)
  File "/usr/lib/python2.7/site-packages/sh.py", line 516, in handle_command_exit_code
    raise exc(self.ran, self.process.stdout, self.process.stderr)
sh.ErrorReturnCode_1: 

  RAN: '/usr/bin/cmake -DP4A=ON -DANDROID_ABI=armeabi -DCMAKE_TOOLCHAIN_FILE=/home/u1/.local/share/python-for-android/build/other_builds/opencv/armeabi/opencv/platforms/android/android.toolchain.cmake -DPYTHON_INCLUDE_PATH=/home/u1/.local/share/python-for-android/build/python-installs/testpygame/include/python2.7 -DPYTHON_LIBRARY=/home/u1/.local/share/python-for-android/build/python-installs/testpygame/lib/libpython2.7.so -DPYTHON_NUMPY_INCLUDE_DIR=/home/u1/.local/share/python-for-android/build/python-installs/testpygame/lib/python2.7/site-packages/numpy/core/include -DANDROID_EXECUTABLE=/home/u1/Android/Sdk/tools/android -DBUILD_TESTS=OFF -DBUILD_PERF_TESTS=OFF -DBUILD_EXAMPLES=OFF -DBUILD_ANDROID_EXAMPLES=OFF -DPYTHON_PACKAGES_PATH=/home/u1/.local/share/python-for-android/build/python-installs/testpygame/lib/python2.7/site-packages /home/u1/.local/share/python-for-android/build/other_builds/opencv/armeabi/opencv'

  STDOUT:
CMake Error at platforms/android/android.toolchain.cmake:827 (list):
  list index: 5 out of range (-5, 4)
Call Stack (most recent call first):
  /usr/share/cmake/Modules/CMakeDetermineSystem.cmake:98 (include)
  CMakeLists.txt:56 (project)


CMake Error at platforms/android/android.toolchain.cmake:873 (message):
  Specified Android native API level 'android-8' is not supported by your
  NDK/toolchain.
Call Stack (most recent call first):
  /usr/share/cmake/Modules/CMakeDetermineSystem.cmake:98 (include)
  CMakeLists.txt:56 (project)


-- Detected version of GNU GCC: 49 (409)
-- Performing Test HAVE_CXX_FSIGNED_CHAR
CMake Error at /home/u1/.local/share/python-for-android/build/other_builds/opencv/armeabi/opencv/platforms/android/android.toolchain.cmake:727 (message):
  Specified ANDROID_ABI = "armeabi" is not supported by this cmake toolchain
  or your NDK/toolchain.

     Supported values are: "x86"

Call Stack (most recent call first):
  /tmp/p4a-build/other_builds/opencv/armeabi/opencv/CMakeFiles/3.0.2/CMakeSystem.cmake:6 (include)
  CMakeLists.txt:2 (project)


CMake Error: CMAKE_CXX_COMPILER not set, after EnableLanguage
CMake Error: Internal CMake error, TryCompile configure of cmake failed
-- Configuring incomplete, errors occurred!
See also "/tmp/p4a-build/other_builds/opencv/armeabi/opencv/CMakeFiles/CMakeOutput.log".


  STDERR:

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[Fak3]

I managed to fix that by adding two flags to cmake in the recipe:

'-DANDROID_NATIVE_API_LEVEL=%s' % os.environ['ANDROIDAPI'],
 '-DANDROID_TOOLCHAIN_NAME=arm-linux-androideabi-4.9',

Hardcoded toolchain name only works for my NDK version. The real fix should somehow detect the proper value for ANDROID_TOOLCHAIN_NAME from what NDK provides

[inclement]

Thanks for noting the fix!

[inclement]

Fixed by #1650, other fixes can follow from that if necessary.