ubuntu - Cannot mark file as executable (?) -


[note:] first thought problem caused cuda, because of filesystem (see in answers) - belong program, if else got stuck here.

the problem

i try program nvidia-gpu on ubuntu, of cuda.

when i'm compiling works fine - no errors, no warnings. in end executable cannot open, message permission denied. when check access rights see file isn't "marked executable". if try set it, box gets unchecked again. commands like

sudo chmod +x ./myprogram

don't work (the rights stay same were).

what did

i installed

sudo apt-get install nvidia-cuda-dev nvidia-cuda-toolkit

and afterwards

sudo apt-get install build-essential freeglut3-dev libgl1-mesa-glx libglu1-mesa-dev libx11-dev libxi-dev libxmu-dev

the code should alright, since it's working on every other machine not on ubuntu/gpu combination (?).

the according cmakeslists.txt

cmake_minimum_required(version 2.8) project( gpusobel ) find_package( cuda required) find_package( opencv required )  if (cuda_found)     message("cuda found!")     set(cuda_nvcc_flags ${cuda_nvcc_flags} -o3 -lineinfo -gencode arch=compute_20,code=sm_20 -gencode=arch=compute_30,code=sm_30 -gencode=arch=compute_35,code=sm_35 -gencode=arch=compute_35,code=compute_35)      set(cudasrcs          main.cu     )      cuda_add_executable(gpusobel ${cudasrcs})  else()     message("cuda not found, abort") endif()  set(cmake_cxx_flags "-g -wall")  # sse support if(cmake_compiler_is_gnucxx)     set(cmake_cxx_flags "${cmake_cxx_flags} -msse -msse2 -msse3") endif()  target_link_libraries( gpusobel ${opencv_libs} )   add_custom_command(target gpusobel post_build    command ${cmake_command} -e copy_directory ${cmake_source_dir}/images $<target_file_dir:gpusobel>/images)

please enlighten me why sudo powerless here, compile- or linux-error ?

have seen http://bikulov.org/blog/2013/12/24/example-of-cmake-file-for-cuda-plus-cpp-code/ ?? use code cmake.


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