OpenCASCADE bug report

[3dm-pro]

configure: WARNING: X11/extensions/multibuf.h: present but cannot be
compiled
configure: WARNING: X11/extensions/multibuf.h: check for missing
prerequisite headers?
configure: WARNING: X11/extensions/multibuf.h: proceeding with the
preprocessor's result
configure: WARNING:     ## ------------------------------------ ##
configure: WARNING:     ## Report this to bug-autoc...@gnu.org. ##
configure: WARNING:     ## ------------------------------------ ##