imx6ulevk - error building ADT CMake project

[aloplop85]

Hello everyone,

I have built an fsl-image-qt5 image for MACHINE=imx6ulevk (the evaluation kit board). Then, I used 'bitbake –c populate_sdk fsl-image-qt5  ' option to create the '.sh' file to deply the toolchain for the system, installed under '/opt/fsl-imx-x11/4.1.15-1.2.0/'

Afterwards, in Eclipse Luna I installed the Yocto ADT plugin and built a Hello World application with Autotools without problem. However, when creating a new Hello World C++ application with 'Yocto Project ADT CMake' I have not been able to build the component, obtaining the following output in CMakeError.log (among other messages):

Determining if the C compiler works failed with the following output:
Change Dir: /home/user/wstest/HelloCmake/Debug/CMakeFiles/CMakeTmp

Run Build Command:/usr/bin/make "cmTryCompileExec1629254916/fast"
/usr/bin/make -f CMakeFiles/cmTryCompileExec1629254916.dir/build.make CMakeFiles/cmTryCompileExec1629254916.dir/build
make[1]: se ingresa al directorio «/home/user/wstest/HelloCmake/Debug/CMakeFiles/CMakeTmp»
/usr/bin/cmake -E cmake_progress_report /home/user/wstest/HelloCmake/Debug/CMakeFiles/CMakeTmp/CMakeFiles 1

Building C object CMakeFiles/cmTryCompileExec1629254916.dir/testCCompiler.c.o
/opt/fsl-imx-x11/4.1.15-1.2.0/sysroots/x86_64-pokysdk-linux/usr/bin/arm-poky-linux-gnueabi/arm-poky-linux-gnueabi-gcc   --sysroot=/home/user/fsl-release-bsp/build_qt5/tmp/sysroots/imx6ulevk    -o CMakeFiles/cmTryCompileExec1629254916.dir/testCCompiler.c.o   -c /home/user/wstest/HelloCmake/Debug/CMakeFiles/CMakeTmp/testCCompiler.c

Linking C executable cmTryCompileExec1629254916
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTryCompileExec1629254916.dir/link.txt --verbose=1
/opt/fsl-imx-x11/4.1.15-1.2.0/sysroots/x86_64-pokysdk-linux/usr/bin/arm-poky-linux-gnueabi/arm-poky-linux-gnueabi-gcc     --sysroot=/home/user/fsl-release-bsp/build_qt5/tmp/sysroots/imx6ulevk     --sysroot=/home/user/fsl-release-bsp/build_qt5/tmp/sysroots/imx6ulevk CMakeFiles/cmTryCompileExec1629254916.dir/testCCompiler.c.o  -o cmTryCompileExec1629254916 -rdynamic

/opt/fsl-imx-x11/4.1.15-1.2.0/sysroots/x86_64-pokysdk-linux/usr/libexec/arm-poky-linux-gnueabi/gcc/arm-poky-linux-gnueabi/5.2.0/real-ld: error: cmTryCompileExec1629254916 uses VFP register arguments, CMakeFiles/cmTryCompileExec1629254916.dir/testCCompiler.c.o does not
/opt/fsl-imx-x11/4.1.15-1.2.0/sysroots/x86_64-pokysdk-linux/usr/libexec/arm-poky-linux-gnueabi/gcc/arm-poky-linux-gnueabi/5.2.0/real-ld: failed to merge target specific data of file CMakeFiles/cmTryCompileExec1629254916.dir/testCCompiler.c.o
collect2: error: ld returned 1 exit status
make[1]: se sale del directorio «/home/user/wstest/HelloCmake/Debug/CMakeFiles/CMakeTmp»
make[1]: *** [cmTryCompileExec1629254916] Error 1
make: *** [cmTryCompileExec1629254916/fast] Error 2

It seems an internal CMake test is failing...but I do not know why :S

I ran:

source /opt/fsl-imx-x11/4.1.15-1.2.0/environment-setup-cortexa7hf-vfp-neon-poky-linux-gnueabi

before starting Eclipse.

What is going on? Thanks in advance.

[aloplop85 · Accepted solution]

The solution is to set correctly the flags for the compiler in the toolchain.cmake file (note the -march, -mfpu, -mtune in the following lines):

# CMake system name must be something like "Linux".
# This is important for cross-compiling.
set(CMAKE_SYSTEM_PROCESSOR )
set(CMAKE_C_COMPILER arm-poky-linux-gnueabi-gcc)
set(CMAKE_CXX_COMPILER arm-poky-linux-gnueabi-g++)

set(CMAKE_C_FLAGS "-march=armv7-a -mfloat-abi=hard -mfpu=neon -mtune=cortex-a7  --sysroot=/home/moviloc/fsl-release-bsp/build_qt5/tmp/sysroots/imx6ulevk" CACHE STRING "CFLAGS")
set(CMAKE_CXX_FLAGS "-march=armv7-a -mfloat-abi=hard -mfpu=neon -mtune=cortex-a7 --sysroot=/home/moviloc/fsl-release-bsp/build_qt5/tmp/sysroots/imx6ulevk -fpermissive" CACHE STRING "CXXFLAGS")
set(CMAKE_C_FLAGS_RELEASE "-march=armv7-a -mfloat-abi=hard -mfpu=neon -mtune=cortex-a7  --sysroot=/home/moviloc/fsl-release-bsp/build_qt5/tmp/sysroots/imx6ulevk -DNDEBUG" CACHE STRING "CFLAGS for release")
set(CMAKE_CXX_FLAGS_RELEASE "-march=armv7-a -mfloat-abi=hard -mfpu=neon -mtune=cortex-a7  --sysroot=/home/moviloc/fsl-release-bsp/build_qt5/tmp/sysroots/imx6ulevk -DNDEBUG" CACHE STRING "CXXFLAGS for release")
set(CMAKE_C_LINK_FLAGS "" CACHE STRING "LDFLAGS")
set(CMAKE_CXX_LINK_FLAGS "" CACHE STRING "LDFLAGS")

[Carlos_Musich]

Hi Alvaro,

thank you for sharing your solution.

Regards,

Carlos