Finally, let us consider the installation directives. We need to install an executable, one library, and one header file. Executables and libraries are build targets, so we use the TARGETS option to the install command. Install rules for multiple targets can be set at once: CMake is aware of what kind of targets they are; that is, whether they are executables, shared libraries, or static libraries:
install( TARGETS message-shared hello-world_wDSO
Executables will be installed in RUNTIME DESTINATION, which we set to ${INSTALL_BINDIR}. Shared libraries are installed to LIBRARY DESTINATION, which we set to ${INSTALL_LIBDIR}. Static libraries would be installed to ARCHIVE DESTINATION, which we also set to ${INSTALL_LIBDIR} ...
