/Users/lixingxing/FMRI_Code/build-untitled3-Desktop_Qt_5_12_10_clang_64bit-Debug/main.o:-1: error: Undefined symbols for architecture x86_64:
"vtksys::SystemToolsManager::SystemToolsManager()", referenced from:
___cxx_global_var_init in main.o
"vtksys::SystemToolsManager::~SystemToolsManager()", referenced from:
___cxx_global_var_init in main.o
:-1: error: linker command failed with exit code 1 (use -v to see invocation)
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [untitled3] Error 1