Add property to export all symbols to create shared library on MSVC.

Author: KKhanhH

src/CMakeLists.txt

@@ -42,6 +42,10 @@ foreach(TARGET ${AV_TARGETS})
       target_link_libraries(${TARGET} PRIVATE ws2_32)
     endif()
 
+    if(MSVC and TYPE STREQUAL "SHARED")
+        set_target_properties(${TARGET} PROPERTIES WINDOWS_EXPORT_ALL_SYMBOLS TRUE)
+    endif()
+
     add_library(${AV_NAMESPACE}::${TARGET} ALIAS ${TARGET})
 endforeach()