Could not find moc executable target Qt6::moc

[g1ennr]

I'm trying to build linuxdeployqt and when running CMake it can't find Qt6::moc.

CMake Error: AUTOMOC for target linuxdeployqt: Could not find moc executable target Qt6::moc
CMake Generate step failed.  Build files cannot be regenerated correctly.

The CMakeLists.txt uses set(CMAKE_AUTOMOC ON).

I have installed Qt 6.5.3 using the maintenance tool and it works correctly for a different qmake project and qmake -query seems to be able to locate moc correctly

$ qmake -query QT_INSTALL_LIBEXECS
/home/glenn/Qt/6.5.3/gcc_64/libexec
$ `qmake -query QT_INSTALL_LIBEXECS`/moc --version
moc 6.5.3

$ cmake --version
cmake version 3.27.7

What could the problem here and how can I fix or work around it?

[g1ennr]

Fixed with the following change in tools/linuxdeployqt/CMakeLists.txt

#find_package(QT NAMES Qt6 Qt5 REQUIRED COMPONENTS Core)
find_package(Qt6 REQUIRED COMPONENTS Core)

[Sayuqwq]

It did not work on my computer, and the cmake output get more complicated. It indicated a path name error when I attempted to remove 'QT' or 'NAMES' or both them.

[SGaist]

@Sayuqwq Hi and welcome to devnet,

One simple way to use cmake is to in fact use the qt-cmake wrapper that is contained in the Qt 6 installation you want to use. Otherwise, use the CMAKE_PREFIX_PATH to point cmake to the Qt version you want to use.

[Marcus Sonestedt - Cellink]

This post is deleted!

[Marcus Sonestedt - Cellink]

The fix that works for me (tm) is:

find_package(QT NAMES Qt6 Qt5)
find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Core Test)

Needed to use CMAKE_PREFIX_PATH for this to work. Just setting QT_DIR / QT did not.