Currently, we only support either Qt4 or gtk2, but OpenCV also
additionally supports Qt5 or gtk3, making for a choice of four
toolkits, one of: Qt4, Qt5, gtk3, gtk2 (and obviously, none).
Since Buildroot does not support coexistence of Qt4 and Qt5, we
can no longer select one and depend on the other, like so:
config BR2_PKG_OCV_WITH_QT4
bool "Qt4"
depends on !BR2_PKG_QT5
select BR2_PKG_QT
config BR2_PKG_OCV_WITH_QT5
bool "Qt5"
depends on !BR2_PKG_QT
select BR2_PKG_QT5
otherwise, we'd get a circular dependency chain in Kconfig, which would
complain with:
package/opencv/Config.in:57:error: recursive dependency detected!
package/opencv/Config.in:57: choice <choice> contains symbol BR2_PKG_OCV_WITH_QT5
package/opencv/Config.in:111: symbol BR2_PKG_OCV_WITH_QT5 depends on BR2_PKG_QT
package/qt/Config.in:5: symbol BR2_PKG_QT is selected by BR2_PKG_OCV_WITH_QT
package/opencv/Config.in:98: symbol BR2_PKG_OCV_WITH_QT is part of choice <choice>
Instead, we need to depend on either Qt version.
So, to have a consistent choice, we make all support for GUI toolkits
actually depend on the toolkit, rather than select it.
Signed-off-by: Samuel Martin <s.martin49@gmail.com>
[yann.morin.1998@free.fr: split-out the switch-selects-to-depends hunk
from the add-qt5 hunk]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
e6a24e2446