Explain why shared library is copied over the unittests folder

Author: mcbarton

lib/Interpreter/CMakeLists.txt

@@ -120,6 +120,7 @@ if(EMSCRIPTEN)
 
   # Replace newlines with spaces
   string(REPLACE "\n" " " SYMBOLS_LIST "${SYMBOLS_LIST}")
+  
   #FIXME: Setting no_soname=1 is needed until https://github.com/emscripten-core/emscripten/blob/ac676d5e437525d15df5fd46bc2c208ec6d376a3/cmake/Modules/Platform/Emscripten.cmake#L36
   # is patched out of emsdk, as --soname is not recognised by emscripten. A PR to do this has been done here https://github.com/emscripten-core/emscripten/pull/23453 
   #FIXME: A patch is needed to llvm to remove -Wl,-z,defs since it is now recognised on emscripten. What needs to be removed is here
@@ -131,7 +132,7 @@ if(EMSCRIPTEN)
     LINK_FLAGS "-s WASM_BIGINT  -s SIDE_MODULE=1 ${SYMBOLS_LIST}"
     SUFFIX ".wasm"
   )
-
+  # When compiling Emscripten tests the shared library as the compiled Javascript
   add_custom_command(TARGET clangCppInterOp POST_BUILD
     COMMAND ${CMAKE_COMMAND} -E copy $<TARGET_FILE:clangCppInterOp> ${CMAKE_BINARY_DIR}/unittests/CppInterOp/
   )