Compilation Error in xlsxworkbook.cpp When Using CMake with Qt6.8.1 and MSVC-2022

[WuMing-dp]

Environment:

• Qt Version: 6.8.1
• Compiler: MSVC-2022 (64-bit)
• Build Tools: Qt Creator and CMake

Problem:

When I build the QXlsx library using CMakeLists.txt with Qt Creator, the following code snippet in xlsxworkbook.cpp triggers a compilation error:

AbstractSheet *sheet = addSheet(name, sheetId, type);  
sheet->setSheetState(state);  
if (relationship.target.startsWith("/")) {  
    QString fullPath = QDir::cleanPath(relationship.target.mid(1));  
    sheet->setFilePath(fullPath);  
}  

The error message is as follows:

D:\cad\QXlsx\QXlsx\source\xlsxworkbook.cpp:610: error: C2248: "QString::QString": cannot access private member declared in class "QString"  
D:\Qt\6.8.1\msvc2022_64\include\QtCore/qstring.h(1014): note: see declaration of "QString::QString"  
D:\Qt\6.8.1\msvc2022_64\include\QtGui/qwindowdefs.h(43): note: see declaration of "QString"  

However, when I use the QXlsx.pro file to open and build the same project in Qt Creator, it compiles successfully without any issues.

Observations:

1. If I comment out the following compile definitions in CMakeLists.txt:

   QT_NO_CAST_TO_ASCII  
   QT_NO_CAST_FROM_ASCII  

   The project compiles successfully even when using CMakeLists.txt.

2. I want to understand why this error occurs when these definitions are enabled.

3. I am concerned whether removing QT_NO_CAST_TO_ASCII and QT_NO_CAST_FROM_ASCII will have any negative impact on the code or library behavior.

Questions:

• Why does the compilation fail when these flags are present?
• Is it safe to comment out these flags in CMakeLists.txt?

Steps to Reproduce:

1. Open the QXlsx project with Qt Creator using CMakeLists.txt.
2. Build the project.
3. Observe the compilation error at xlsxworkbook.cpp line 610.
4. Comment out QT_NO_CAST_TO_ASCII and QT_NO_CAST_FROM_ASCII in CMakeLists.txt.
5. Rebuild the project and notice it compiles successfully.