Can't find the source file when cmake

[kundezui]

I can't find the source file when compiling, how to solve it?
The " /home/qw/qtnodeeditor/build/lib" is empty!
cmake 3.22.1 and qt5.14.2

qw@qw-virtual-machine:~/qtnodeeditor/build$ cmake ..
-- QT_VERSION: 5.14.2, QT_DIR: /opt/Qt5.14.2/5.14.2/gcc_64/lib/cmake/Qt5
-- Configuring done
CMake Error at CMakeLists.txt:194 (add_library):
Cannot find source file:

/home/qw/qtnodeeditor/build/lib

Tried extensions .c .C .c++ .cc .cpp .cxx .cu .mpp .m .M .mm .ixx .cppm .h
.hh .h++ .hm .hpp .hxx .in .txx .f .F .for .f77 .f90 .f95 .f03 .hip .ispc

-- Generating done
CMake Generate step failed. Build files cannot be regenerated correctly.