Subject: bug#7785: rgrep is broken on woe32

From: Eli Zaretskii <[email-masked]>
Date: Wed, 05 Jan 2011 23:33:27 +0200

> Date: Wed, 5 Jan 2011 16:20:13 -0500
> From: Sam Steingold <[email-masked]>
> Cc: Eli Zaretskii <[email-masked]>, [email-masked]
> 
> -iname \*.\[ch\]\+\+ \) -print0 | c:/gnu/gnuwin32/bin/xargs -0 -e
> c:/gnu/gnuwin32/bin/grep -i -nH gettempdir
> 'c:' is not recognized as an internal or external command,
> operable program or batch file.

I think forward slashes are not supported in the pipe parts after the
first `|'.  Only the first command gets its slashes mirrored.  Can you
try adding "c:\gnu\gnuwin32\bin" to your PATH (Emacs will need to be
restarted afterwards)?

If that doesn't help, can you try with GnuWin32 ports, but configure
rgrep not to use xargs?