Build with Qt

[SollyTaylor]

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Here is an hack experience to share. I hope the maintainer of this project could notic such tiny issue.

1. build the example-crud
2. the main function arguments list bothers the compiler in Qt Creator (shown as the image below), the QCoreApplication requires the QCoreApplication constructor to accept a char* argv[] instead of const char* argv[] , when I delete the const qualifier, I got a build pass.