for recognition with mapflag.
2 - A few bugs are removed in connection with argument passing to the
linker (unrecognized flags and libraries).
3 - The setting of RTS, HEAD and TAIL is done directly after the
path determination for each file.
2 - Recognize the fact that it is possible to start a combiner without
input files.
3 - Removed -d flag. Overflow for -v (>2) now ends up in debug.
-v may be followed by a number indicating the increment.
2 - The overall scheme is altered.
first, all input files are processed until a combining phase is met.
then, all the combining phases are executed, the resulting files
are again processed until a combiner (or final) phase is met.
3 - The EM_DIR shell variable can be used to set ack's idea of the EM
home directory.
would not need to be fed through a pre-processor.
This assumption proved false. Ack was altered and allows
use of a pre-processor on files produced by other passes.
