GTK 2.6.4 - XOpenDisplay in -lX11......no - libX11 not found

[Maurizio Caloro <mauric gmx ch>]

Hello,

on me solaris 9 sparc maschine i wan't Compile GTK+-2.6.4
if i made ./configure 

or
" /usr/gtk+-2.6.4 23:48:01 > ./configure --prefix=/usr/bin
--bindir=/usr/bin --libdir=/usr/lib --includedir=/usr/include
--mandir=/usr/man --x-includes=/usr/openwin/include
--x-libraries=/usr/openwin/lib"

i become this error

checking for XOpenDisplay in -lX11... no
configure: error: *** libX11 not found. Check 'config.log' for more details."

[config log]
| char XOpenDisplay ();
| int main ()
| {| XOpenDisplay ();
|   ;|   return 0;| }
configure:28482: result: no
configure:28487: error: *** libX11 not found. Check 'config.log' for more details.
[config log -- END]

and i can't finish with "Configure"
it's possible to use X from "/usr/openwin/lib" ?
or its possible that i need a other xlib version  ?
or its possible that me installed x it's to old ?

please i dont see any way to fix me following error
i need help, i say thanks for any help

Best regards
Maurizio