Install static library.

Closes commonmark/commonmark-spec#381.

Author: jgm

src/CMakeLists.txt

@@ -117,9 +117,10 @@ endif(MSVC)
 
 set(CMAKE_INSTALL_SYSTEM_RUNTIME_LIBS_NO_WARNINGS ON)
 include (InstallRequiredSystemLibraries)
-install(TARGETS ${PROGRAM} ${LIBRARY}
+install(TARGETS ${PROGRAM} ${LIBRARY} ${STATICLIBRARY}
   RUNTIME DESTINATION bin
   LIBRARY DESTINATION lib
+  ARCHIVE DESTINATION lib
   )
 
 install(FILES