lupdate warns about Unterminated C++ string while parsing CMakeLists.txt

C/C++ compiler definitions including double-quotes in CMake project files, makes lupdate generating unwanted messages.

How to reproduce:

• Use a Qt CMake project
• add to CMakeLists.txt a line like add_compile_definitions(PRJ_NAME_DEF=\"${PROJECT_NAME}\")
• Execute lupdate on the project from Qt Creator (Tools -> External -> Linguist -> Update Translations (lupdate)

In the output of lupdate you will get something like:
.../CMakeLists.txt: Unterminated C++ string
.../CMakeLists.txt: Unbalanced opening parenthesis in C++ code (or abuse of the C++ preprocessor)
(N.B.: complete paths and CMakeLists.txt line numbers have been omitted here)

I do not found any other way to include double-quotes in the argument of add_compile_definitions().

Furthermore, I suppose this is a bug since lupdate should not parse CMakeLists.txt as C++ code.