can't build gtk20 in 4.10-stable

[h]

can't compile gtk20 for python for gimp ... config.log attached

how can i fix this ? i don't understand the error


checking for gethostbyname... yes
checking for connect... yes
checking for remove... yes
checking for shmat... yes
checking for IceConnectionNumber in -lICE... yes
checking for XOpenDisplay in -lX11... no
configure: error: *** libX11 not found. Check 'config.log' for more details.
===>  Script "configure" failed unexpectedly.
*** Error code 1

Stop in /usr/ports/x11-toolkits/gtk20.
*** Error code 1

Stop in /usr/ports/x11-toolkits/py-gtk2.
*** Error code 1

Stop in /usr/ports/graphics/gimp.