GitLab

Detail:
  amu cleverly sets Sys$ReturnCode to zero just prior to executing
    any command from the Makefile, hence checking for Sys$ReturnCode
    does not work.  Script changed to look for AMU$ReturnCode which
    is (in amu 5.06 and later) the return code of the previous command.
    However, since the variable will not be set by earlier versions of
    amu, the behaviour of always copying the file will return until
    amu 5.06 appears in the build.
Admin:
  Tested manually.

Version 4.99. Tagged as 'RISC_OSLib-4_99'