We would like a general solution. BSD compatibility matters. It seems that Ultrix make does not correctly handle shell commands having logical connectives in them. See previous section for such. There are many pending suggestions to choose from.
Various systems implement flavours of symbolic links showing different behaviour and properties.
We did not successfully sorted all these out yet. This will be progressively corrected over the incoming few years. The emphasis from 1.11.2 to 1.12 has been on solving the main portability, execution or usability bugs.