Added ltrace - library call tracer. Note that it needed adding an extension point to doUnpack, but it doesn't force full rebuild of everything using builder composing.

svn path=/nixpkgs/trunk/; revision=9574

pkgs/development/tools/misc/ltrace/default.nix

@@ -0,0 +1,30 @@
+args : with args;
+	with builderDefs {
+		src = /* put a fetchurl here */
+	fetchurl {
+		url = ftp://ftp.debian.org/debian/pool/main/l/ltrace/ltrace_0.5.orig.tar.gz;
+		sha256 = "1nbjcnizc0w3p41g7hqf1qiany8qk4xs9g4zrlq4fpxdykdwla3v";
+	};
+
+		buildInputs = [elfutils ];
+		configureFlags = [];
+		goSrcDir = "
+			cd ltrace-*;
+		";
+	} null; /* null is a terminator for sumArgs */
+	with stringsWithDeps;
+let
+	preConfigure = FullDepEntry ("
+		sed -e 's@-o root -g root@@' -i Makefile.in;
+	") [doUnpack minInit];
+in
+stdenv.mkDerivation rec {
+	name = "ltrace-0.5";
+	builder = writeScript (name + "-builder")
+		(textClosure [preConfigure doConfigure doMakeInstall doForceShare]);
+	meta = {
+		description = "
+	Library call tracer.
+";
+	};
+}