1Differences between PW make & original make:
 2-  If exit status is ignored for an executed command,
 3   a warning is not printed if the command returns a non-zero status.
 4   The original prints such a warning.
 5-  When the command is printed prior to execution,
 6   the command name is prefixed with ">";  this makes the commands stand out.
 7-  Has builtin suffix rules for LEAP script .t-.o files, and .z-.h files.
 8-  After reading internal "makerules" file,
 9   but before reading the local "makefile" file,
10   PW version reads "makecomm"/"Makecomm"in login directory,
11   and then in local directory.
12   "makecomm" is useful for defining "common" macro names.
13-  PW version exec's commands by using pexec(), which uses the .path file.