Qt creator has issues while building android for x86 using Cmake

[ankitdg]

Hello,

I tried to build a simple app from http://doc.qt.io/qtcreator/qtcreator-accelbubble-example.html to build on my Linux virtual machine. The program compiles perfect with the desktop build but has an issue when building for android.
The error i get is as follows:

-- Check for working CXX compiler: /home/user/android-ndk-r16b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-g++
-- Check for working CXX compiler: /home/user/android-ndk-r16b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-g++ -- broken
CMake Error at /home/user/Android/Sdk/cmake/3.6.4111459/share/cmake-3.6/Modules/CMakeTestCXXCompiler.cmake:54 (message):
  The C++ compiler
  "/home/user/android-ndk-r16b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-g++"
  is not able to compile a simple test program.

  It fails with the following output:

   Change Dir: /home/user/testProjects/build-bubbleWork-Android_for_x86_GCC_4_9_Qt_5_9_3_for_Android_x86-newBuild/CMakeFiles/CMakeTmp

I have installed all the necessary tools from android studio and linked my android SDK and NDK (SDK Version: 26.1.1, NDK Version: 16.1.4479499) to my Qt creator.

The java settings: java-1.8.0-openjdk-amd64

the issue I feel is the default android GCC compilers.

The compiler i am currently using for C and CXX is: toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-g++
I did use different compilers but all gave me the same error.

What can be the issue for this? Should I use Clang instead of GCC? Do I need to create a platform-independent build tool?

[jsulm]

@ankitdg In the title you write you're building for x86, but you're using compiler for ARM.
Also, you should check the CMake log to see what exactly fails.

[ankitdg]

Hello,

Sorry for the novice mistake! I was trying to use different compilers in the NDK but i end up with the same error. The code i uploaded before was from one of my trials.
I did change my configuration to x86 but i still get the same error. Since this is my 1st time for android, I may have missed something.

The error stays the same. The 1st few line of my cmake error log states:

Compiling the CXX compiler identification source file "CMakeCXXCompilerId.cpp" failed.
Compiler: /home/user/android-ndk-r16b/toolchains/x86-4.9/prebuilt/linux-x86_64/bin/i686-linux-android-g++ 
Build flags: 
Id flags: 
The output was:
1
/home/user/android-ndk-r16b/toolchains/x86-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/i686-linux-android/4.9.x/../../../../i686-linux-android/bin/ld: error: cannot open crtbegin_dynamic.o: No such file or directory
/home/user/android-ndk-r16b/toolchains/x86-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/i686-linux-android/4.9.x/../../../../i686-linux-android/bin/ld: error: cannot open crtend_android.o: No such file or directory
/home/user/android-ndk-r16b/toolchains/x86-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/i686-linux-android/4.9.x/../../../../i686-linux-android/bin/ld: error: cannot find -lstdc++
/home/user/android-ndk-r16b/toolchains/x86-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/i686-linux-android/4.9.x/../../../../i686-linux-android/bin/ld: error: cannot find -lm
/home/user/android-ndk-r16b/toolchains/x86-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/i686-linux-android/4.9.x/../../../../i686-linux-android/bin/ld: error: cannot find -lc
/home/user/android-ndk-r16b/toolchains/x86-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/i686-linux-android/4.9.x/../../../../i686-linux-android/bin/ld: error: cannot find -ldl
collect2: error: ld returned 1 exit status

and the cmake output states

-- The CXX compiler identification is GNU 4.9.0
-- Check for working CXX compiler: /home/user/android-ndk-r16b/toolchains/x86-4.9/prebuilt/linux-x86_64/bin/i686-linux-android-gcc
-- Check for working CXX compiler: /home/user/android-ndk-r16b/toolchains/x86-4.9/prebuilt/linux-x86_64/bin/i686-linux-android-gcc -- broken
CMake Error at /usr/share/cmake-3.5/Modules/CMakeTestCXXCompiler.cmake:54 (message):
  The C++ compiler
  "/home/user/android-ndk-r16b/toolchains/x86-4.9/prebuilt/linux-x86_64/bin/i686-linux-android-gcc"
  is not able to compile a simple test program.

  It fails with the following output:

   Change Dir: /home/user/testProjects/build-bubbleWork-Android_for_x86_GCC_4_9_Qt_5_9_3_for_Android_x86-Default/CMakeFiles/CMakeTmp

  

  Run Build Command:"/usr/bin/make" "cmTC_c05c5/fast"

  /usr/bin/make -f CMakeFiles/cmTC_c05c5.dir/build.make
  CMakeFiles/cmTC_c05c5.dir/build

  make[1]: Entering directory
  '/home/user/testProjects/build-bubbleWork-Android_for_x86_GCC_4_9_Qt_5_9_3_for_Android_x86-Default/CMakeFiles/CMakeTmp'


  Building CXX object CMakeFiles/cmTC_c05c5.dir/testCXXCompiler.cxx.o

  
  /home/user/android-ndk-r16b/toolchains/x86-4.9/prebuilt/linux-x86_64/bin/i686-linux-android-gcc
  -o CMakeFiles/cmTC_c05c5.dir/testCXXCompiler.cxx.o -c
  /home/user/testProjects/build-bubbleWork-Android_for_x86_GCC_4_9_Qt_5_9_3_for_Android_x86-Default/CMakeFiles/CMakeTmp/testCXXCompiler.cxx


  Linking CXX executable cmTC_c05c5

  /usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_c05c5.dir/link.txt
  --verbose=1

  
  /home/user/android-ndk-r16b/toolchains/x86-4.9/prebuilt/linux-x86_64/bin/i686-linux-android-gcc
  CMakeFiles/cmTC_c05c5.dir/testCXXCompiler.cxx.o -o cmTC_c05c5 -rdynamic

  
  /home/user/android-ndk-r16b/toolchains/x86-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/i686-linux-android/4.9.x/../../../../i686-linux-android/bin/ld:
  error: cannot open crtbegin_dynamic.o: No such file or directory