From:	"A.Appleyard" <A DOT APPLEYARD AT fs2 DOT mt DOT umist DOT ac DOT uk>
Organization:	Materials Science Centre
To:	DJGPP AT DELORIE DOT COM
Date:	Mon, 24 Feb 1997 12:11:45 GMT
Subject:	How to find all references?
Message-ID:	<331556E34ED@fs2.mt.umist.ac.uk>

  I have resubscribed to djgpp.
  I have written a big multi-file djgpp Gnu C++ program (a text editor). I
want to weed it, ie. to remove all unused variables and ordinary functions and
class-member functions.
  -Wall gets djgpp to warn about unused variables inside functions. OK.
  If I declare functions and zero-level variables as `static', djgpp (at least
with -Wall) will moan if they are unused; but as they are `static' they can
only be used in that file, which is no use to me with a multi-file program,
and anyway it doesn't seem to work with unused class-member functions.
  So, how to find all unused zero-level variables and ordinary functions and
class-member functions?
  I can't do this with DJGPP\BIN\NM.EXE: I've tried.
  It would be useful if the linker had an option to warn of all unused
references.
  Failing either of those:-
  (1) Where among the source forms of the assembler and linker, or elsewhere,
is a description of the internal format of a djgpp *.O file?, so I can write
my own program to read a set of *.O files and list all references found in
them and which of them are unused.
  (2) Is there a specific `demangle' function anywhere in djgpp? I.e. e.g. int
demangle(char*x,char*y); which puts into y a demangled form of the name in x.

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