Unrecognized command line option -rdynamic / undefined reference to `__global_pointer$'

[gemenerik]

Trying to cross-compile OpenCV 2.4 with this toolchain.

cmake -DCMAKE_BUILD_TYPE=Release-DBUILD_SHARED_LIBS=OFF -DCV_DISABLE_OPTIMIZATION=OFF -DWITH_IPP=OFF -DWITH_TBB=OFF -DWITH_OPENMP=OFF -DWITH_PTHREADS_PF=OFF -DWITH_QUIRC=OFF -DWITH_1394=OFF -DWITH_CUDA=OFF -DWITH_OPENCL=OFF -DWITH_OPENCLAMDFFT=OFF -DWITH_OPENCLAMDBLAS=OFF -DWITH_VA_INTEL=OFF -DWITH_EIGEN=OFF-DWITH_GSTREAMER=OFF -DWITH_GTK=OFF -DWITH_JASPER=OFF -DWITH_JPEG=OFF -DWITH_WEBP=OFF -DBUILD_ZLIB=ON-DBUILD_PNG=ON -DWITH_TIFF=OFF -DWITH_V4L=OFF -DWITH_LAPACK=OFF-DWITH_ITT=OFF -DWITH_PROTOBUF=OFF -DWITH_IMGCODEC_HDR=OFF -DWITH_IMGCODEC_SUNRASTER=OFF -DWITH_IMGCODEC_PXM=OFF -DWITH_IMGCODEC_PFM=OFF -DBUILD_LIST=core,imgproc,imgcodecs-DBUILD_JAVA=OFF-DBUILD_opencv_python=OFF -DBUILD_opencv_java=OFF -DBUILD_opencv_apps=OFF-DBUILD_PACKAGE=OFF-DBUILD_PERF_TESTS=OFF-DBUILD_TESTS=OFF-DCV_ENABLE_INTRINSICS=OFF-DCV_TRACE=OFF-DOPENCV_ENABLE_MEMALIGN=OFF -DCMAKE_C_COMPILER=/lib/gap_riscv_toolchain/bin/riscv32-unknown-elf-gcc -DCMAKE_CXX_COMPILER=/lib/gap_riscv_toolchain/bin/risc32-unknown-elf-g++ ..

I get the following error

-- The CXX compiler identification is GNU 7.1.1
-- The C compiler identification is GNU 7.1.1
-- Check for working CXX compiler: /usr/lib/gap_riscv_toolchain/bin/riscv32-unknown-elf-g++
-- Check for working CXX compiler: /usr/lib/gap_riscv_toolchain/bin/riscv32-unknown-elf-g++ -- broken
CMake Error at /usr/share/cmake-3.16/Modules/CMakeTestCXXCompiler.cmake:53 (message):
  The C++ compiler

    "/usr/lib/gap_riscv_toolchain/bin/riscv32-unknown-elf-g++"

  is not able to compile a simple test program.

  It fails with the following output:

    Change Dir: /home/rik/opencv/build/CMakeFiles/CMakeTmp
    
    Run Build Command(s):/usr/bin/make cmTC_66644/fast && /usr/bin/make -f CMakeFiles/cmTC_66644.dir/build.make CMakeFiles/cmTC_66644.dir/build
    make[1]: Entering directory '/home/rik/opencv/build/CMakeFiles/CMakeTmp'
    Building CXX object CMakeFiles/cmTC_66644.dir/testCXXCompiler.cxx.o
    /usr/lib/gap_riscv_toolchain/bin/riscv32-unknown-elf-g++     -o CMakeFiles/cmTC_66644.dir/testCXXCompiler.cxx.o -c /home/rik/opencv/build/CMakeFiles/CMakeTmp/testCXXCompiler.cxx
    Linking CXX executable cmTC_66644
    /usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_66644.dir/link.txt --verbose=1
    /usr/lib/gap_riscv_toolchain/bin/riscv32-unknown-elf-g++       -rdynamic CMakeFiles/cmTC_66644.dir/testCXXCompiler.cxx.o  -o cmTC_66644 
    riscv32-unknown-elf-g++: error: unrecognized command line option '-rdynamic'
    make[1]: *** [CMakeFiles/cmTC_66644.dir/build.make:87: cmTC_66644] Error 1
    make[1]: Leaving directory '/home/rik/opencv/build/CMakeFiles/CMakeTmp'
    make: *** [Makefile:121: cmTC_66644/fast] Error 2
    
    

  

  CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
  CMakeLists.txt:64 (project)


-- Configuring incomplete, errors occurred!
See also "/home/rik/opencv/build/CMakeFiles/CMakeOutput.log".
See also "/home/rik/opencv/build/CMakeFiles/CMakeError.log".

CMakeError.log

Compiling the CXX compiler identification source file "CMakeCXXCompilerId.cpp" failed.
Compiler: /usr/lib/gap_riscv_toolchain/bin/riscv32-unknown-elf-g++ 
Build flags: 
Id flags:  

The output was:
1
/usr/lib/gap_riscv_toolchain/bin/../lib/gcc/riscv32-unknown-elf/7.1.1/../../../../riscv32-unknown-elf/lib/rv32imcxgap9/ilp32/crt0.o: In function `_start':
(.text+0x8): undefined reference to `__global_pointer$'
collect2: error: ld returned 1 exit status


Compiling the C compiler identification source file "CMakeCCompilerId.c" failed.
Compiler: /usr/lib/gap_riscv_toolchain/bin/riscv32-unknown-elf-gcc 
Build flags: 
Id flags:  

The output was:
1
/usr/lib/gap_riscv_toolchain/bin/../lib/gcc/riscv32-unknown-elf/7.1.1/../../../../riscv32-unknown-elf/lib/rv32imcxgap9/ilp32/crt0.o: In function `_start':
(.text+0x8): undefined reference to `__global_pointer$'
collect2: error: ld returned 1 exit status


Determining if the CXX compiler works failed with the following output:
Change Dir: /home/rik/opencv/build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/make cmTC_66644/fast && /usr/bin/make -f CMakeFiles/cmTC_66644.dir/build.make CMakeFiles/cmTC_66644.dir/build
make[1]: Entering directory '/home/rik/opencv/build/CMakeFiles/CMakeTmp'
Building CXX object CMakeFiles/cmTC_66644.dir/testCXXCompiler.cxx.o
/usr/lib/gap_riscv_toolchain/bin/riscv32-unknown-elf-g++     -o CMakeFiles/cmTC_66644.dir/testCXXCompiler.cxx.o -c /home/rik/opencv/build/CMakeFiles/CMakeTmp/testCXXCompiler.cxx
Linking CXX executable cmTC_66644
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_66644.dir/link.txt --verbose=1
/usr/lib/gap_riscv_toolchain/bin/riscv32-unknown-elf-g++       -rdynamic CMakeFiles/cmTC_66644.dir/testCXXCompiler.cxx.o  -o cmTC_66644 
riscv32-unknown-elf-g++: error: unrecognized command line option '-rdynamic'
make[1]: *** [CMakeFiles/cmTC_66644.dir/build.make:87: cmTC_66644] Error 1
make[1]: Leaving directory '/home/rik/opencv/build/CMakeFiles/CMakeTmp'
make: *** [Makefile:121: cmTC_66644/fast] Error 2

Different error for OpenCV 4.5.1 (latest)

-- The CXX compiler identification is GNU 7.1.1
-- The C compiler identification is GNU 7.1.1
-- Check for working CXX compiler: /usr/lib/gap_riscv_toolchain/bin/riscv32-unknown-elf-g++
-- Check for working CXX compiler: /usr/lib/gap_riscv_toolchain/bin/riscv32-unknown-elf-g++ -- broken
CMake Error at /usr/share/cmake-3.16/Modules/CMakeTestCXXCompiler.cmake:53 (message):
  The C++ compiler

    "/usr/lib/gap_riscv_toolchain/bin/riscv32-unknown-elf-g++"

  is not able to compile a simple test program.

  It fails with the following output:

    Change Dir: /home/rik/new_opencv/opencv/build/CMakeFiles/CMakeTmp
    
    Run Build Command(s):/usr/bin/make cmTC_fca23/fast && /usr/bin/make -f CMakeFiles/cmTC_fca23.dir/build.make CMakeFiles/cmTC_fca23.dir/build
    make[1]: Entering directory '/home/rik/new_opencv/opencv/build/CMakeFiles/CMakeTmp'
    Building CXX object CMakeFiles/cmTC_fca23.dir/testCXXCompiler.cxx.o
    /usr/lib/gap_riscv_toolchain/bin/riscv32-unknown-elf-g++    -fPIE   -o CMakeFiles/cmTC_fca23.dir/testCXXCompiler.cxx.o -c /home/rik/new_opencv/opencv/build/CMakeFiles/CMakeTmp/testCXXCompiler.cxx
    Linking CXX executable cmTC_fca23
    /usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_fca23.dir/link.txt --verbose=1
    /usr/lib/gap_riscv_toolchain/bin/riscv32-unknown-elf-g++       CMakeFiles/cmTC_fca23.dir/testCXXCompiler.cxx.o  -o cmTC_fca23 
    /usr/lib/gap_riscv_toolchain/bin/../lib/gcc/riscv32-unknown-elf/7.1.1/../../../../riscv32-unknown-elf/lib/rv32imcxgap9/ilp32/crt0.o: In function `_start':
    (.text+0x8): undefined reference to `__global_pointer$'
    collect2: error: ld returned 1 exit status
    make[1]: *** [CMakeFiles/cmTC_fca23.dir/build.make:87: cmTC_fca23] Error 1
    make[1]: Leaving directory '/home/rik/new_opencv/opencv/build/CMakeFiles/CMakeTmp'
    make: *** [Makefile:121: cmTC_fca23/fast] Error 2
    
    

  

  CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
  CMakeLists.txt:107 (enable_language)


-- Configuring incomplete, errors occurred!
See also "/home/rik/new_opencv/opencv/build/CMakeFiles/CMakeOutput.log".
See also "/home/rik/new_opencv/opencv/build/CMakeFiles/CMakeError.log".

I don't know where to take it from here.