libxaw7-dev binary package in Ubuntu Xenial arm64

 libXaw7 provides the second version of Xaw, the Athena Widgets toolkit,
 which is largely used by legacy X applications. This version is the
 most common version, as version 6 is considered deprecated, and version
 8, which adds Xprint support, is unsupported and not widely used.
 In general, use of a more modern toolkit such as GTK+ is recommended.
 .
 This package contains the development headers for the library found in
 libxaw7. Non-developers likely have little use for this package.
 .
 More information about X.Org can be found at:
 <URL:http://www.X.org>
 .
 This module can be found at
 git://anongit.freedesktop.org/git/xorg/lib/libXaw

Source package