Do not build examples on s390x as they fail

qt6-qtquick3d.spec

@@ -36,12 +36,13 @@ Requires: qt6-qtdeclarative-devel%{?_isa}
 %description devel
 %{summary}.
 
+%ifnarch s390x
 %package examples
 Summary: Programming examples for %{name}
 Requires: %{name}%{?_isa} = %{version}-%{release}
 %description examples
 %{summary}.
-
+%endif
 
 %prep
 %autosetup -n %{qt_module}-everywhere-src-%{version} -p1
@@ -54,7 +55,10 @@ Requires: %{name}%{?_isa} = %{version}-%{release}
 # Disable LTO
 %define _lto_cflags %{nil}
 
-%cmake_qt6
+%cmake_qt6 \
+%ifarch s390x
+  -DQT_BUILD_EXAMPLES=OFF
+%endif
 #   -DQT_FEATURE_system_assimp=ON
 
 %cmake_build
@@ -139,12 +143,12 @@ popd
 %{_qt6_libdir}/libQt6Quick3DUtils.so
 %{_qt6_libdir}/metatypes/qt6*_metatypes.json
 
-
+%ifnarch s390x
 %if 0%{?_qt6_examplesdir:1}
 %files examples
 %{_qt6_examplesdir}/
 %endif
-
+%endif
 
 %changelog
 * Thu Jan 14 2021 Jan Grulich <jgrulich@redhat.com> - 6.0.0-1