I'm not quite sure I follow your question, but it's trivial to test an
empty string:
ifeq (,$(VAR))
$(warning Variable VAR is empty)
else
$(warning Variable VAR is not empty)
endif
--
-------------------------------------------------------------------------------
Paul D. Smith <[EMAIL PROTECTED]> Find some GNU make tips at:
http://www.gnu.org http://make.paulandlesley.org
"Please remain calm...I may be mad, but I am a professional." --Mad Scientist
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