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