Android: support NDK16#10515
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opencv-pushbot merged 9 commits intoopencv:masterfrom Jan 12, 2018
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This makes it possible to compile OpenCV with for instance ndk-r16
Compiler message: tif_unix.c:170:12: error: call to 'mmap' declared with attribute error: mmap is not available with _FILE_OFFSET_BITS=64 when using GCC until android-21. Either raise your minSdkVersion, disable _FILE_OFFSET_BITS=64, or switch to Clang.
…DK_CCACHE)
To prevent this result:
/usr/bin/ccache ccache <android-ndk-r16.1>/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc ...
with:
ccache: error: Recursive invocation (the name of the ccache binary must be "ccache")
To use 'z' in Android.mk instead of absolute path from the build machine.
Avoids this error message with CMake 3.10: CMake Error: CMake was unable to find a build program corresponding to "Ninja". CMAKE_MAKE_PROGRAM is not set. You probably need to select a different build tool. Related changes is that pkg-config tool is found (/usr/bin/pkg-config).
mshabunin
approved these changes
Jan 12, 2018
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👍 Thank you for this, much appreciated ! |
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CMAKE_MAKE_PROGRAMin case of (-GNinja): Explaination for build_sdk.py #10448BTW, Binaries size of OpenCV Android SDK with NDK r16 is about ~3Gb (NDK r10 ~800Mb). Most part of this impact is related to static .a files.