tags and dist target broken with VPATH

[Ganesan Rajagopal <rganesan@novell.com>]

Hi,

Automake does not handle TAGS correctly when VPATH is used. I investigated
the generated rule for tags and found the TAGS rule as follows.

TAGS:  $(HEADERS) $(SOURCES)  $(TAGS_DEPENDENCIES) $(LISP)
	tags=; \
	here=`pwd`; \
	list='$(SOURCES) $(HEADERS)'; \
	unique=`for i in $$list; do echo $$i; done | \
	  awk '    { files[$$0] = 1; } \
	       END { for (i in files) print i; }'`; \
	test -z "$(ETAGS_ARGS)$$unique$(LISP)$$tags" \
	  || (cd $(srcdir) && etags $(ETAGS_ARGS) $$tags  $$unique $(LISP) -o $$here/TAGS)

This will not work in the presence of VPATH. The fix is to change

list='$(SOURCES) $(HEADERS)'

to 

list='$^'

Am I missing something obvious? I haven't figured out why make dist is
broken. 

Ganesan