<![CDATA[meet a problem when attempting to promote imported target "Threads::Threads" to global scope]]>I ran into a problem when cross-building Qt 6.4.2 from source by following Cross-Compile_Qt_6_for_Raspberry_Pi.

the cmake produced the following output.

CMake Error at qtbase/cmake/QtPublicTargetHelpers.cmake:257 (set_property):
  Attempt to promote imported target "Threads::Threads" to global scope (by
  setting IMPORTED_GLOBAL) which is not built in this directory.
Call Stack (most recent call first):
  qtbase/cmake/QtFindPackageHelpers.cmake:180 (__qt_internal_promote_target_to_global)
  qtbase/src/corelib/CMakeLists.txt:4 (qt_find_package)
]]>https://forum.qt.io/topic/165021/meet-a-problem-when-attempting-to-promote-imported-target-threads-threads-to-global-scopeRSS for NodeSun, 20 Sep 2026 11:18:11 GMTTue, 18 Aug 2026 15:52:03 GMT60<![CDATA[Reply to meet a problem when attempting to promote imported target "Threads::Threads" to global scope on Sat, 22 Aug 2026 18:33:18 GMT]]>Can you try with a more recent version of Qt ?
While I understand the motivation of staying on certain version, these kind of issue might have already been solved later.

]]>https://forum.qt.io/post/839829https://forum.qt.io/post/839829Sat, 22 Aug 2026 18:33:18 GMT<![CDATA[Reply to meet a problem when attempting to promote imported target "Threads::Threads" to global scope on Sun, 23 Aug 2026 18:27:18 GMT]]>Excellent !

Good luck :-)

]]>https://forum.qt.io/post/839836https://forum.qt.io/post/839836Sun, 23 Aug 2026 18:27:18 GMT<![CDATA[Reply to meet a problem when attempting to promote imported target "Threads::Threads" to global scope on Sat, 22 Aug 2026 18:45:27 GMT]]>I fixed it by checking the latest source code. : )

]]>https://forum.qt.io/post/839831https://forum.qt.io/post/839831Sat, 22 Aug 2026 18:45:27 GMT<![CDATA[Reply to meet a problem when attempting to promote imported target "Threads::Threads" to global scope on Sat, 22 Aug 2026 18:33:18 GMT]]>Can you try with a more recent version of Qt ?
While I understand the motivation of staying on certain version, these kind of issue might have already been solved later.

]]>https://forum.qt.io/post/839829https://forum.qt.io/post/839829Sat, 22 Aug 2026 18:33:18 GMT<![CDATA[Reply to meet a problem when attempting to promote imported target "Threads::Threads" to global scope on Thu, 20 Aug 2026 07:25:46 GMT]]>I migrate my application, originally developed on Ubuntu 24.04, from x86 to the RPi5.
I want to use the same Qt version to develop the application for both platforms.

I built Qt 6.4.2 from source, as the latest Raspbian ships with Qt 6.8.2.

]]>https://forum.qt.io/post/839798https://forum.qt.io/post/839798Thu, 20 Aug 2026 07:25:46 GMT<![CDATA[Reply to meet a problem when attempting to promote imported target "Threads::Threads" to global scope on Wed, 19 Aug 2026 18:50:14 GMT]]>You did not answer about the use of an outdated version of Qt.

]]>https://forum.qt.io/post/839790https://forum.qt.io/post/839790Wed, 19 Aug 2026 18:50:14 GMT<![CDATA[Reply to meet a problem when attempting to promote imported target "Threads::Threads" to global scope on Wed, 19 Aug 2026 06:01:16 GMT]]>@SGaist yes, I use two separate build folders. It's in the buildhost directory to build Qt for the host machine, and in the buildrpi5 directory for the rpi5.

]]>https://forum.qt.io/post/839785https://forum.qt.io/post/839785Wed, 19 Aug 2026 06:01:16 GMT<![CDATA[Reply to meet a problem when attempting to promote imported target "Threads::Threads" to global scope on Tue, 18 Aug 2026 19:00:17 GMT]]>Hi,

Might be a silly question but did you properly use two separate build folders ?
Also why Qt 6.4.2 rather than a current version ?

]]>https://forum.qt.io/post/839780https://forum.qt.io/post/839780Tue, 18 Aug 2026 19:00:17 GMT<![CDATA[Reply to meet a problem when attempting to promote imported target "Threads::Threads" to global scope on Tue, 18 Aug 2026 17:36:39 GMT]]>the host system is Ubuntu 24.04.
the RPi5 system is Debian Trixie.

]]>https://forum.qt.io/post/839779https://forum.qt.io/post/839779Tue, 18 Aug 2026 17:36:39 GMT<![CDATA[Reply to meet a problem when attempting to promote imported target "Threads::Threads" to global scope on Tue, 18 Aug 2026 17:33:33 GMT]]>I got sysroot from latest RPi OS image.

In the sysroot, the file /usr/lib/aarch64-linux-gnu/cmake/zstd/zstdConfig.cmake has the following code,

include(CMakeFindDependencyMacro)
if(ON AND "1")
  find_dependency(Threads)
endif()

include("${CMAKE_CURRENT_LIST_DIR}/zstdTargets.cmake")

check_required_components("zstd")
]]>https://forum.qt.io/post/839778https://forum.qt.io/post/839778Tue, 18 Aug 2026 17:33:33 GMT<![CDATA[Reply to meet a problem when attempting to promote imported target "Threads::Threads" to global scope on Tue, 18 Aug 2026 15:59:17 GMT]]>find_package(Threads) might have been called in another directory first, and that's why promoting imported target "Threads::Threads" to global scope fails here

]]>https://forum.qt.io/post/839776https://forum.qt.io/post/839776Tue, 18 Aug 2026 15:59:17 GMT