In /usr/bin/xmkmf line 52:
echo imake $imake_defines $args
           ^------------^ SC2086: Double quote to prevent globbing and word splitting.
                          ^---^ SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
echo imake "$imake_defines" "$args"


In /usr/bin/xmkmf line 55:
    imake $imake_defines $args &&
          ^------------^ SC2086: Double quote to prevent globbing and word splitting.
                         ^---^ SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
    imake "$imake_defines" "$args" &&


In /usr/bin/xmkmf line 64:
    imake $imake_defines $args
          ^------------^ SC2086: Double quote to prevent globbing and word splitting.
                         ^---^ SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
    imake "$imake_defines" "$args"

For more information:
  https://www.shellcheck.net/wiki/SC2086 -- Double quote to prevent globbing ...