Agfdhyk

I'm trying to compile a dynamic library for Android. I use CMake-gui on Windows to do it. I successfully built the library (TagLib) a few years ago. But now the toolchain doesn't work anymore.

If I try to point the android.toolchain.cmake script to NDK R18, it fails with this error message:

Android: Targeting API '22' with architecture 'arm', ABI 'armeabi-v7a', and processor 'armv7-a'

CMake Error at C:/app/cmake/share/cmake-3.12/Modules/Platform/Android/Determine-Compiler-NDK.cmake:97 (message):

  Android: No toolchain for ABI 'armeabi-v7a' found in the NDK:

I think it might be related to the fact that Android NDK now switched from GCC to Clang. So I tried an older NDK R16b. Now it gets a little bit further but still fails now with this error message:

CMake Error at C:/app/cmake/share/cmake-3.12/Modules/CMakeTestCCompiler.cmake:52 (message):   The C compiler



    "c:/app/android-ndk-r16b/toolchains/arm-linux-androideabi-4.9/prebuilt/windows-x86_64/bin/arm-linux-androideabi-gcc.exe"



  is not able to compile a simple test program.



  It fails with the following output:



    Change Dir: C:/Moje/QtProjects/taglib_build/CMakeFiles/CMakeTmp



    Run Build Command:"C:/Qt/Tools/mingw530_32/bin/mingw32-make.exe" "cmTC_9e009/fast"

    C:/Qt/Tools/mingw530_32/bin/mingw32-make.exe -f CMakeFilescmTC_9e009.dirbuild.make CMakeFiles/cmTC_9e009.dir/build



    mingw32-make.exe[1]: Entering directory 'C:/Moje/QtProjects/taglib_build/CMakeFiles/CMakeTmp'



    Building C object CMakeFiles/cmTC_9e009.dir/testCCompiler.c.o



    c:appandroid-ndk-r16btoolchainsarm-linux-androideabi-4.9prebuiltwindows-x86_64binarm-linux-androideabi-gcc.exe

-target armv7-none-linux-androideabi --sysroot=C:/app/android-ndk-r16b/platforms/android-22/arch-arm  -isystem C:appandroid-ndk-r16bplatformsandroid-22arch-armusrinclude

-isystem C:appandroid-ndk-r16bplatformsandroid-22arch-armusrincludearm-linux-androideabi

-g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -march=armv7-a -mfloat-abi=softfp -mfpu=vfpv3-d16 -fno-integrated-as -mthumb -Wa,--noexecstack -Wformat -Werror=format-security   -O0 -fno-limit-debug-info  -fPIE   -o CMakeFilescmTC_9e009.dirtestCCompiler.c.o   -c C:MojeQtProjectstaglib_buildCMakeFilesCMakeTmptestCCompiler.c



    arm-linux-androideabi-gcc.exe: error: armv7-none-linux-androideabi: No such file or directory



    arm-linux-androideabi-gcc.exe: error: unrecognized command line option '-target'



    arm-linux-androideabi-gcc.exe: error: unrecognized command line option '-fno-integrated-as'



    arm-linux-androideabi-gcc.exe: error: unrecognized command line option '-fno-limit-debug-info'



    CMakeFilescmTC_9e009.dirbuild.make:64: recipe for target 'CMakeFiles/cmTC_9e009.dir/testCCompiler.c.o' failed



    mingw32-make.exe[1]: *** [CMakeFiles/cmTC_9e009.dir/testCCompiler.c.o] Error 1



    mingw32-make.exe[1]: Leaving directory 'C:/Moje/QtProjects/taglib_build/CMakeFiles/CMakeTmp'



    Makefile:120: recipe for target 'cmTC_9e009/fast' failed



    mingw32-make.exe: *** [cmTC_9e009/fast] Error 2

I don't understand what is wrong with the test command and why it fails. Do you have any idea?

And after all is my approach to build a dynamic Android library correct or are there better ways to do it? I don't use Android Studio, I develop my application in QtCreator.

My issue was almost the same when I tried to build an Android .apk on my macOS with a console command. Whereas Visual Studio GUI builds ok, the msbuild makes an error:

error XA5101: C compiler for target Arm was not found. 

It's discussed on Xamarin forum here.

The work-around found here and worked for me is to switch off BundleAssemblies parameter in Android.csproj:

<BundleAssemblies>False</BundleAssemblies>

Also my solutions with wrong NDK and toolchain paths were founded here. I installed the latest versions of Android SDK and NDK.