Re: GNU Make enhansment patch - batching compiles

[Paul D. Smith]

%% "Jason Wessel" <address@hidden> writes:

  jw> Here is a more concrete example and why $? doesn't work for this
  jw> application.

  jw> First the non-complicated example, with just single compiles:

  jw> all: 1.o 2.o 3.o
  jw> 1.o: 1.c
  jw>         gcc -c $<
  jw> 2.o: 2.c
  jw>         gcc -c $<
  jw> 3.o: 3.c
  jw>         gcc -c $<

  jw> Now if I want to batch up all the files to compiler at once
  jw> I try this to make use of the $?:
  jw> all: 1.o 2.o 3.o
  jw> 1.o 2.o 3.o: 1.c 2.c 3.c
  jw>         gcc -c $?

I think what Eli is suggesting is you do it like this:

  CompList1: jason.java fine.java mine.java
      @if [ "$?" = "" ]; then; \
         echo targets up to date. ; \
       else
         echo compiling $? into outputs; \
       fi

-- 
-------------------------------------------------------------------------------
 Paul D. Smith <address@hidden>          Find some GNU make tips at:
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 "Please remain calm...I may be mad, but I am a professional." --Mad Scientist