Re: a small problem...

[Paul D. Smith]

%% Regarding a small problem...;
%% "Tehn Yit Chin" <address@hidden> writes:

  tyc> .PHONY:  debug all

  tyc> OBJECTS     := fred.txt
  tyc> CDE         := debug.txt

  tyc> debug : OBJECTS = $(OBJECTS) $(CDE)
  tyc> debug : all

  tyc> all : $(OBJECTS)
  tyc>      @echo $(OBJECTS) "executing target=all"

  tyc> fred.txt :
  tyc>      @echo $(OBJECTS) "executing target=fred.txt"

  tyc> debug.txt :
  tyc>      @echo $(OBJECTS) "executing target=debug.txt"

  tyc> fred.txt debug.txt executing target=fred.txt
  tyc> fred.txt debug.txt executing target=all

  tyc> My question is shouldn't the "debug" target cause it to include
  tyc> debug.txt as a dependency as well as fred.txt? The above small
  tyc> test does not seem to back this up.

See the GNU make manual: target-specific variables are only valid within
command scripts, and within the context of other target-specific
variables.  So, the value of $(OBJECT) when it's expanded in the
prerequisites list is not in those categories and so doesn't take into
account target-specific variable values.

-- 
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