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From: Richard Stallman <rms@gnu.org>
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Subject: Re: TODO additions
Date: Wed, 13 Nov 2002 06:32:35 -0500
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That code loked strange to me before, but I see now--it is this rule.

${SUBDIR}: maybe_bootstrap ${SUBDIR_MAKEFILES} FRC
	cd $@; $(MAKE) all $(MFLAGS) \
	  CC='${CC}' CFLAGS='${CFLAGS}' CPPFLAGS='${CPPFLAGS}' \
	  LDFLAGS='${LDFLAGS}' MAKE='${MAKE}'

I see only one change since March 2001 that appears to have
affected this code.

    (all): Don't depend on maybe_bootstrap here.
    (${SUBDIR}): Depend on it here instead.