Unknown option 'qt5' GEN libgui/src/ui-settings-dialog.h

[Tatsuro MATSUOKA]

In the below bug tracker,
http://savannah.gnu.org/bugs/?48761


Old qt5 seems to made not complete GUI on dev. branch.
 Qt 5.2.1 on ubuntu 14.04 does not give correct GUI 
 but Qt 5.6.1 on Fedora 24 (by Dmitri) and Qt 5.5.1 on lubuntu 16.04 (by me)
 give correct GUI. 

So I have built qt 5.6.1 and QScintilla 2.9.3 on ubuntu 14.04 and tried to use 
them for 
dev. branch. Both are installed into /usr/local.

configure passed without issue but I have met an error.


updating libinterp/corefcn/oct-tex-parser.h
  GEN      libgui/src/ui-settings-dialog.h
Unknown option 'qt5'.


Any suggestions?

Tatsuro