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.
+";
+	};
+}

pkgs/top-level/all-packages.nix

@@ -1353,6 +1353,11 @@ rec {
     inherit fetchurl stdenv;
   };
 
+  ltrace = import ../development/tools/misc/ltrace {
+  	inherit fetchurl stdenv builderDefs stringsWithDeps lib 
+		elfutils;
+  };
+
   mk = import ../development/tools/build-managers/mk {
     inherit fetchurl stdenv;
   };

pkgs/top-level/builder-defs.nix

@@ -117,7 +117,7 @@ rec
 		}
 	") [minInit];
 
-	toSrcDir = s : FullDepEntry (if (archiveType s) == "tar" then "
+	toSrcDir = s : FullDepEntry ((if (archiveType s) == "tar" then "
 			tar xvf ${s}
 			cd \"\$(tar tf ${s} | head -1 | sed -e 's@/.*@@' )\"
 	" else if (archiveType s) == "tgz" then "
@@ -126,7 +126,9 @@ rec
 	" else if (archiveType s) == "tbz2" then "
 			tar xvjf ${s}
 			cd \"\$(tar tjf ${s} | head -1 | sed -e 's@/.*@@' )\"
-	" else (abort "unknown archive type : ${s}")) [minInit];
+	" else (abort "unknown archive type : ${s}"))+
+		(if args ? goSrcDir then args.goSrcDir else "")
+	) [minInit];
 
 	doConfigure = FullDepEntry ("
 		./configure --prefix=\"\$prefix\" ${toString (getAttr ["configureFlags"] "" args)}