[wip/{qgv,hpp-gui,hpp-plot}] prepend DEPEND_ABI with PKGTAG.qt-

hpp-gui/depend.mk

@@ -15,7 +15,11 @@ PREFER.hpp-gui?=	robotpkg
 
 DEPEND_USE+=		hpp-gui
 
-DEPEND_ABI.hpp-gui?=	hpp-gui>=4.3.0
+# depend on appropriate Qt version when using Qt, all versions otherwise.
+_hppg_qts={qt4,qt5}
+_hppg_qt=$(if $(filter qt,${PKG_ALTERNATIVES}),${PKG_ALTERNATIVE.qt},${_hppg_qts})
+
+DEPEND_ABI.hpp-gui?=	${_hppg_qt}-hpp-gui>=4.3.0
 DEPEND_DIR.hpp-gui?=	../../wip/hpp-gui
 
 SYSTEM_SEARCH.hpp-gui=\

hpp-plot/depend.mk

@@ -15,7 +15,11 @@ PREFER.hpp-plot?=	robotpkg
 
 DEPEND_USE+=		hpp-plot
 
-DEPEND_ABI.hpp-plot?=	hpp-plot>=4.3.0
+# depend on appropriate Qt version when using Qt, all versions otherwise.
+_hppp_qts={qt4,qt5}
+_hppp_qt=$(if $(filter qt,${PKG_ALTERNATIVES}),${PKG_ALTERNATIVE.qt},${_hppp_qts})
+
+DEPEND_ABI.hpp-plot?=	${hppp_qt}-hpp-plot>=4.3.0
 DEPEND_DIR.hpp-plot?=	../../wip/hpp-plot
 
 SYSTEM_SEARCH.hpp-plot=\

qgv/depend.mk

@@ -21,7 +21,11 @@ SYSTEM_SEARCH.qgv=\
 
 DEPEND_USE+=		qgv
 
-DEPEND_ABI.qgv?=	qgv>=1.1.0
+# depend on appropriate Qt version when using Qt, all versions otherwise.
+_qgv_qts={qt4,qt5}
+_qgv_qt=$(if $(filter qt,${PKG_ALTERNATIVES}),${PKG_ALTERNATIVE.qt},${_qgv_qts})
+
+DEPEND_ABI.qgv?=	${_qgv_qt}-qgv>=1.1.0
 DEPEND_DIR.qgv?=	../../wip/qgv
 
 endif # QGV_DEPEND_MK ------------------------------------------------