Build fails with WITH_GSL=OFF

[kannes]

What is the bug or the crash?

Building QGIS fails for me if I disable WITH_GSL:

[ 97%] Linking CXX shared library ../../output/lib/libqgis_app.so
/usr/bin/ld: CMakeFiles/qgis_app.dir/qgssettingsregistryapp.cpp.o: in function `qt_getEnumMetaObject(QgsImageWarper::ResamplingMethod)':
qgssettingsregistryapp.cpp:(.text._Z20qt_getEnumMetaObjectN14QgsImageWarper16ResamplingMethodE[_Z20qt_getEnumMetaObjectN14QgsImageWarper16ResamplingMethodE]+0xe): undefined reference to `QgsImageWarper::staticMetaObject'
/usr/bin/ld: CMakeFiles/qgis_app.dir/qgssettingsregistryapp.cpp.o: in function `QMetaEnum QMetaEnum::fromType<QgsImageWarper::ResamplingMethod>()':
qgssettingsregistryapp.cpp:(.text._ZN9QMetaEnum8fromTypeIN14QgsImageWarper16ResamplingMethodEEES_v[_ZN9QMetaEnum8fromTypeIN14QgsImageWarper16ResamplingMethodEEES_v]+0x10): undefined reference to `QgsImageWarper::staticMetaObject'
collect2: error: ld returned 1 exit status
make[2]: *** [src/app/CMakeFiles/qgis_app.dir/build.make:4781: output/lib/libqgis_app.so.3.27.0] Fehler 1
make[1]: *** [CMakeFiles/Makefile2:6767: src/app/CMakeFiles/qgis_app.dir/all] Fehler 2
make: *** [Makefile:166: all] Fehler 2

Steps to reproduce the issue

1. Set WITH_GSL=OFF
2. make
3. See the build fail

Versions

Recent master, a87893b

Supported QGIS version

• I'm running a supported QGIS version according to the roadmap.

New profile

• I tried with a new QGIS profile

Additional context

Ubuntu 22.04.1 LTS

[kannes]

I did reproduce it on Archlinux with ninja with today's master:

...
  cmake -G "Ninja" ../ \
    -DCMAKE_INSTALL_PREFIX=/opt/$pkgname \
    -DCMAKE_BUILD_TYPE=RelWithDebInfo \
    -DQGIS_MANUAL_SUBDIR=share/man \
    -DENABLE_TESTS=FALSE \
    -DWITH_3D=TRUE \
    -DWITH_PDAL=TRUE \
    -DWITH_GSL=FALSE

  ninja
...

Here I get:

/usr/bin/ld: src/app/CMakeFiles/qgis_app.dir/qgssettingsregistryapp.cpp.o: in function `QMetaEnum QMetaEnum::fromType<QgsImageWarper::ResamplingMethod>()':
/usr/include/qt/QtCore/qmetaobject.h:236: undefined reference to `QgsImageWarper::staticMetaObject'
/usr/bin/ld: /usr/include/qt/QtCore/qmetaobject.h:236: undefined reference to `QgsImageWarper::staticMetaObject'
/usr/bin/ld: src/app/CMakeFiles/qgis_app.dir/qgssettingsregistryapp.cpp.o: in function `QMetaTypeIdQObject<QgsImageWarper::ResamplingMethod, 16>::qt_metatype_id()':
/usr/include/qt/QtCore/qmetatype.h:2021: undefined reference to `QgsImageWarper::staticMetaObject'
/usr/bin/ld: /usr/include/qt/QtCore/qmetatype.h:2021: undefined reference to `QgsImageWarper::staticMetaObject'
/usr/bin/ld: src/app/CMakeFiles/qgis_app.dir/qgssettingsregistryapp.cpp.o: in function `QMetaEnum QMetaEnum::fromType<QgsImageWarper::ResamplingMethod>()':
/usr/include/qt/QtCore/qmetaobject.h:236: undefined reference to `QgsImageWarper::staticMetaObject'
/usr/bin/ld: src/app/CMakeFiles/qgis_app.dir/qgssettingsregistryapp.cpp.o:/usr/include/qt/QtCore/qmetaobject.h:236: more undefined references to `QgsImageWarper::staticMetaObject' follow
collect2: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.

[kannes]

Yay thanks!