Why do I get this “error: undefined reference to `qt_version_tag' ”?

问题

I am using Qt 5.7 on Ubuntu 16 LTS machine.

I get this error:

(.qtversion[qt_version_tag]+0x0):-1: error: undefined reference to `qt_version_tag'

This error comes only when I use SDL libraries.

回答1:

I realize this is an old thread but you may be able to avoid it by defining QT_NO_VERSION_TAGGING; that is, by passing the option:

-DQT_NO_VERSION_TAGGING

to gcc.

来源：https://stackoverflow.com/questions/39871879/why-do-i-get-this-error-undefined-reference-to-qt-version-tag