Hi,

I got a similar problem today and resolved it in the following way:

kill all CygWin processes

just start ash (it doesn't work with bash / rxvt etc.)

check with ps that ash is the only process running (you should only see ash and ps)

$ ps
      PID    PPID    PGID     WINPID  TTY  UID    STIME COMMAND
    20764       1   20764      20764  con 41423 15:35:44 /usr/bin/ash
    82492   20764   20764      82548  con 41423 16:34:35 /usr/bin/ps
[download]

run rebaseall

$ rebaseall
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now run the normal building steps

$ perl Makefile.pl
$ make
$ make test
$ make install
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and you should be fine