monteverdi and mapla segfault at startup

Description

With release-6.6 branch up-to-date, on my debian stable, building without superbuild (thus using qt system package, which is 5.7.1), monteverdi and mapla crash even before starting :

$ ./bin/monteverdi
Erreur de segmentation

Steps to reproduce

Build otb and monteverdi on debian stable with qt system package.

Configuration information

Backtrace in gdb does not provide much information :

Program received signal SIGSEGV, Segmentation fault.
0x00007fffdff15184 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
(gdb) bt
#0  0x00007fffdff15184 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#1  0x00007ffff7de88aa in call_init (l=<optimized out>, argc=argc@entry=1, argv=argv@entry=0x7fffffffe218, env=env@entry=0x7fffffffe228) at dl-init.c:72
#2  0x00007ffff7de89bb in call_init (env=0x7fffffffe228, argv=0x7fffffffe218, argc=1, l=<optimized out>) at dl-init.c:30
#3  _dl_init (main_map=0x7ffff7ffe170, argc=1, argv=0x7fffffffe218, env=0x7fffffffe228) at dl-init.c:120
#4  0x00007ffff7dd9c5a in _dl_start_user () from /lib64/ld-linux-x86-64.so.2
#5  0x0000000000000001 in ?? ()
#6  0x00007fffffffe45e in ?? ()
#7  0x0000000000000000 in ?? ()