Starting with abuild version 1.1, it is possible to use the
     --with-rdeps flag to instruct abuild to expand
     the build set by adding all reverse
     dependencies of any build item initially in the build
     set.  When combined with --repeat-expansion,
     this process is applied iteratively so that all forward and
     reverse dependencies of every item in the build set will also be
     in the build set.
     [22]
     This can be especially useful if you are changing a widely used
     item and you want to make sure your change didn't break any build
     items that use your item.  For additional details on how the
     build set is constructed, see Section 33.5, “Construction of the Build Set”..
    
[22] 
       Stated formally, when abuild is invoked with both
       --with-rdeps and
       --repeat-expansion, the build set is closed
       with respect to forward and reverse dependencies.