Examples are intended to show how to build against an installed Qt.
Building them as part of the main build means the way the Qt targets
are defined and created are not representative of an end user's build.
By building them as separate projects using ExternalProject, we can
more closely replicate the intended audience's environment. This
should allow us to catch more problems earlier.
Having examples built as part of the main build also creates problems
with some static builds where a tool built by the main build is needed
during configure time. This happens with other repos like qtdeclarative
but not (currently) with qtbase. Converting the examples in qtbase to
be built using ExternalProject is intended as a demonstrator for how
other repos can do similar. Until other repos are converted, they will
continue to work as they did before, with examples as part of the main
build for non-static builds only.
The new build-externally behavior is only supported for non-prefix
builds with this change. Prefix builds will continue to use the old
non-external method. Support for building examples externally in
prefix builds will be a separate change.
Task-number: QTBUG-90820
Fixes: QTBUG-91068
Change-Id: I2304329940568dbdb7da18d54d5595ea7d8668bc
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
The ui_XXX.h include did not match the location of the XXX.ui file, and
AUTOUIC failed with
"SRC:/addtorrentdialog.h"
includes the uic file "ui_addtorrentform.h",
but the user interface file "addtorrentform.ui"
could not be found in the following directories
"SRC:"
While this could be fixed by adjusting the include paths properly, this
would complicate the CMake project file, and we're dealing with an
example where needless complexity would cloud comprehensibility.
Move the .ui file next to corresponding source files instead.
This removes the need for any special cases in CMakeLists.txt, and we
can remove .prev_CMakeLists.txt.
Fixes: QTBUG-87457
Pick-to: 6.1
Change-Id: Ic2dec5ded7100e22d5afc571efc4b009bc62e41c
Reviewed-by: Kai Koehne <kai.koehne@qt.io>
