Set rpath when building Qt

elahav

Hello,

I followed the instructions for building Qt from source for QNX (https://doc.qt.io/qt-6/building-qt-for-qnx.html). Everything went well, except for the rpath string embedded in the library. In 5.x you could run the configure script with -prefix and -extprefix for the target and host top-level directories, respectively.
What would be the equivalent when using cmake on 6.x code?

Thanks,
--Elad

JoeCFD

rpath is run time path for app to look for libs. -prefix is the path for installation. They are different. Not sure which one you need.

elahav

When building Qt itself, the libraries it creates (e.g., libQt6Core.so.6) have their rpath set to the target installation directory.

Anyway, I believe that the answer is in the generic configuration section for cross-compiling, which is linked at the bottom of the QNX page: https://doc.qt.io/qt-6/configure-linux-device.html#configuring-qt

According to this document, the cmake equivalent for -extprefix is CMAKE_STAGING_PREFIX, and for -prefix it is CMAKE_INSTALL_PREFIX.

--Elad