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Editorial Team
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Asked: 2026-06-04T00:59:02+00:00

I have the following problem: The library libopencv_java.so compiled from OpenCV 2.3.1 with NDK6

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I have the following problem:
The library libopencv_java.so compiled from OpenCV 2.3.1 with NDK6 works fine on Samsung Galaxy S, but not on Galaxy Tab.
Build setup:

-MacOS X

-NDK6

-build with neon

The library seems to fail on double->integer conversions.

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1 Answer

  1. Editorial Team

    It seems Galaxy Tab uses Nvidia Tegra 2 CPU.
    Recently there was a bug fixed in NDK that generated invalid code for Tegra 2 processors related to floating point instructions. Here is the quote from NDK r7c changelog:

    This release of the NDK includes an important fix for Tegra2-based devices, and a few additional fixes and improvements:

    Important bug fixes:
    Fixed GNU STL armeabi-v7a binaries to not crash on non-NEON devices. The files provided with NDK r7b were not configured properly, resulting in crashes on Tegra2-based devices and others when trying to use certain floating-point functions (e.g., cosf, sinf, expf).

    So try recompiling OpenCV with at least NDK r7c.

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