1. Trying to call the Virtual function from the constructor or description function of the base class, will cause the LNK2001.
2, if the inline function used is defined in the .cpp file, not in the header file
Rightening will cause the LNK2001 error.
3. When compiling the debug version of the application, if you use the distribution modal library to connect
LNK2001; Similarly, use the debug version of the modal library to connect the distribution application to the same
problem.
4, different versions of libraries and compilers can also generate problems, because the new version of Cali can
Can contain symbols and descriptions that have not been issued earlier.
