Hi, There has been no response to my bug report at: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=61193 Can anyone else at least confirm this problem (on Tumbleweed)? The output from 'diff -D' (v3.9) is missing the '#ifdef' directives. Version 3.8 of diff works ok, so it may be fine on Leap. The following creates a file 'c', and diffs it with a couple lines deleted, using three different options.     diff -v |grep diff     seq 5 > c     for OPT in '' '-D ZZZ' '-u'  ;do       printf '\n=== diff %s\n' "$OPT"       sed 2,3d c  |diff $OPT c -       done -- Robert Webb