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POrecursive makefile not building
 

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    <p>I have a bunch of C files in different directories and I'm getting a <code>make: nothing to be done for 'all'</code> error with my recursive Makefile; however if I tweak the dependences I can get it to work... but I don't understand why I have to. </p> <p>Here's my original Makefile:</p> <pre><code>APP_DIRS=rescoco ressys resvm .PHONY: all all: $(APP_DIRS) $(APP_DIRS): $(MAKE) --directory $@ clean: $(RM) *~ </code></pre> <p>Now if I change my line: <code>.PHONY</code> to <code>.PHONY: all $(APP_DIRS)</code> it builds fine. </p> <p>Another possibility is if I change the line: <code>$(APP_DIRS):</code> to <code>$(APP_DIRS): clean</code> it builds fine.</p> <p>(NOTE: removing .PHONY target doesn't change anything) <br><br><br> So what's going on here? Is the Makefile trying to tell me I haven't listed dependencies correctly? I was thinking <code>make</code> would do something like:</p> <ul> <li>to build <code>.PHONY</code> I first have to build <code>all</code></li> <li>to build <code>all</code> I first have to build <code>$(APP_DIRS)</code> </li> <li><code>$(APP_DIRS)</code> has no prereqs so execute the command for that (which would cause the recursive makes to run). </li> </ul> <p>Clearly I am wrong; but why? </p> <hr> <p>FYI, if it matters my files are structured something like this:</p> <pre><code>Makefile #top level makefile as seen above /rescoco rescoco.c Makefile #builds rescoco src and moves archive to ../lib directory /ressys ressys.c Makefile #same as above but for ressys /resvm resvm.c Makefile #same as above but for resvm /lib </code></pre> <p>and my build command is simply <code>make</code>. When I run with <code>make -n</code> or <code>make -n all</code> I get no output at all:</p> <pre><code>:~/proj$ make -n all make: Nothing to be done for 'all'. :~/proj$ </code></pre>
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    1. COwhat command are you using? make all?
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    2. CORun make -n to see exactly what's going on. I also use printing of variables to make sure everything works as it should.
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    3. CO@75inchpianist - just `make`, but `make all` gives the same results. (see edit)
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