🚀 go-pugleaf

%% Regarding GNU make and $$@;
%% djm@morticia.inmos.co.uk (David McKay) writes:

    dm> It says in the documentation that this construct can be replaced
    dm> with a static pattern rule, so I tried

    dm> $(EXPORTS) : %: $(notdir $@)

You cannot use _any_ automatic variables in GNU make in the target or
dependency lists, in any type of rule.  Automatic variables (like $@)
are defined only for command scripts.

You can use only patterns.  And I don't think you can use functions on
patterns, either; e.g., I don't think this works:

  $(EXPORTS) : % : $(notdir %)

The only way you can do it that I'm aware of is to break it up into
multiple variables, one for each target directory; I use a PUBBINS for
exported binaries, PUBLIBS for exported libraries, and PUBHDRS for
exported headers, like this:

  BINDIR = /top/bin
  LIBDIR = /top/lib
  HDRDIR = /top/include

  PUBBINS = bin
  PUBLIBS = liblib.a
  PUBHDRS = hdr.h

  $(PUBBINS:%=$(BINDIR)/%) : $(BINDIR)/% : %
        $(INSTALL) -m 755 $^ $(BINDIR)

  $(PUBLIBS:%=$(LIBDIR)/%) : $(LIBDIR)/% : %
        $(INSTALL) -m 644 $^ $(LIBDIR)

  $(PUBHDRS:%=$(HDRDIR)/%) : $(HDRDIR)/% : %
        $(INSTALL) -m 644 $^ $(HDRDIR)

etc.
-- 
-------------------------------------------------------------------------------
 Paul D. Smith <psmith@baynetworks.com>         Network Management Development
 Senior Software Engineer                                   Bay Networks, Inc.
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 "Please remain calm...I may be mad, but I am a professional." --Mad Scientist
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     These are my opinions--Bay Networks takes no responsibility for them.