################## ONLY WORKAROUND AND WARNING ###################
if(NOT "$ENV{LIBRARY_PATH}" STREQUAL "")
message(WARNING "the environment variable LIBRARY_PATH is set. this can lead to problems during linking. \n You can unset it in your CMakeLists.txt with the command unset(ENV{LIBRARY_PATH}).\n")
endif()
#if(NOT "$ENV{LIBRARY_PATH}" STREQUAL "")
# message(WARNING "the environment variable LIBRARY_PATH is set. this can lead to problems during linking. \n You can unset it in your CMakeLists.txt with the command unset(ENV{LIBRARY_PATH}).\n")