Cross-compiling KDE applications for another ISA

Help
1

I’m able to cross-compile certain Qt 6 applications for AArch64 from an x86_64 host by setting QT_HOST_PATH to “/usr”, but all the KDE applications I’ve tried to cross-compile that way have given me this error:

CMake Warning at /usr/share/ECM/modules/ECMQueryQt.cmake:95 (message):
  Failed call: /usr/aarch64-chimera-linux-musl/usr/lib/qt6/bin/qtpaths
  --query QT_INSTALL_PREFIX
Call Stack (most recent call first):
  /usr/share/ECM/kde-modules/KDEInstallDirs6.cmake:197 (ecm_query_qt)
  /usr/share/ECM/kde-modules/KDEInstallDirs.cmake:15 (include)
  CMakeLists.txt:15 (include)


CMake Error at /usr/share/ECM/modules/ECMQueryQt.cmake:96 (message):
  Qt6 qtpaths call failed: Unknown system error -8
Call Stack (most recent call first):
  /usr/share/ECM/kde-modules/KDEInstallDirs6.cmake:197 (ecm_query_qt)
  /usr/share/ECM/kde-modules/KDEInstallDirs.cmake:15 (include)
  CMakeLists.txt:15 (include)

It seems ECMQueryQt is trying to run qtpaths from the target sysroot.

I looked up ECMQueryQt and found this in its description (sorry, I can’t post the link because my account is new):

For Qt5 this uses qmake, and for Qt6 this used qtpaths (the latter has built-in support to query the paths of a target platform when cross-compiling).

So I assume supporting cross-compiling is a goal for this module, but I’m struggling to figure out how to do it. I can’t seem to find anything at all on this topic by searching online.

2

I’m not sure we have many people trying to crosscompile manually since our primary crossplatform tool is Craft. You might want to ask about this on the Craft Matrix room.

1 Like
3

All right, thank you.