CMake: Support standard variable BUILD_SHARED_LIBS
CMake: Support standard variable BUILD_SHARED_LIBS

https://cmake.org/cmake/help/latest/variable/BUILD_SHARED_LIBS.html

libexpat/libexpat,libexpat/libexpat,libexpat/libexpat,libexpat/libexpat,libexpat/libexpat,libexpat/libexpat