compiling xfce4 issue

Hello,
I am compiling xfce4 on a Sun Blade 1500, I soon finished but an error
appears that I can not solve, i use pkgsrc2016Q4, on NetBSD 7.0.2.
here is my output:


> suword' does not name a type
>              jsuword        word;
>              ^
> In file included from
> /usr/pkgsrc/lang/spidermonkey17/work/mozjs17.0.0/js/src/jspropertycac
> he.h:15:0,
>                  from
> /usr/pkgsrc/lang/spidermonkey17/work/mozjs17.0.0/js/src/jscntxt.h:23,
>                  from
> /usr/pkgsrc/lang/spidermonkey17/work/mozjs17.0.0/js/src/jsalloc.cpp:9
> :
> /usr/pkgsrc/lang/spidermonkey17/work/mozjs17.0.0/js/src/vm/String.h:3
> 98:24: warning: inline function 'static void
> JSString::writeBarrierPost(JSString*, void*)' used but never defined
> [enabled by default]
>      static inline void writeBarrierPost(JSString *str, void *addr);
>                         ^
> /usr/pkgsrc/lang/spidermonkey17/work/mozjs17.0.0/js/src/vm/String.h:3
> 97:24: warning: inline function 'static void
> JSString::writeBarrierPre(JSString*)' used but never defined [enabled
> by default]
>      static inline void writeBarrierPre(JSString *str);
>                         ^
> config/rules.mk:1017: recipe for target 'jsalloc.o' failed
> gmake[1]: *** [jsalloc.o] Error 1
> gmake[1]: Leaving directory
> '/usr/pkgsrc/lang/spidermonkey17/work/mozjs17.0.0/js/src'
> config/rules.mk:576: recipe for target 'all' failed
> gmake: *** [all] Error 2
> *** Error code 2
> 
> Stop.
> make[4]: stopped in /usr/pkgsrc/lang/spidermonkey17
> *** Error code 1
> 
> Stop.
> make[3]: stopped in /usr/pkgsrc/lang/spidermonkey17
> *** Error code 1
> 
> Stop.
> make[2]: stopped in /usr/pkgsrc/security/polkit
> *** Error code 1
> 
> Stop.
> make[1]: stopped in /usr/pkgsrc/x11/xfce4-session
> *** Error code 1
> 
> Stop.
> make: stopped in /usr/pkgsrc/meta-pkgs/xfce4
> udct-raptor# 

Regards 
Philippe