ibtool: add to toolchain

- init package
- add into xcbuild/toolchain.nix

pkgs/development/tools/xcbuild/toolchain.nix

@@ -1,6 +1,7 @@
 {stdenv, writeText, toolchainName, xcbuild, fetchurl
 , llvm, cctools, gcc, bootstrap_cmds, binutils
-, yacc, flex, m4, unifdef, gperf, indent, ctags, makeWrapper}:
+, yacc, flex, m4, unifdef, gperf, indent, ctags, makeWrapper
+, ibtool}:
 
 let
 
@@ -89,6 +90,8 @@ stdenv.mkDerivation {
     ln -s ${cctools}/bin/pagestuff
     ln -s ${cctools}/bin/ranlib
     ln -s ${cctools}/bin/redo_prebinding
+
+    ln -s ${ibtool}/bin/ibtool
   '' +
     # No point including the entire gcc closure if we don't already have it
     (if stdenv.cc.isClang then ''

pkgs/os-specific/darwin/ibtool/default.nix

@@ -0,0 +1,20 @@
+{ stdenv }:
+
+assert stdenv.isDarwin;
+
+stdenv.mkDerivation {
+  name = "ibtool";
+  src = "/usr/bin/ibtool";
+
+  unpackPhase = "true";
+  dontBuild = true;
+
+  installPhase = ''
+    mkdir -p "$out"/bin
+    ln -s "$src" "$out"/bin
+  '';
+
+  meta = with stdenv.lib; {
+    platforms   = platforms.darwin;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -18407,4 +18407,6 @@ with pkgs;
   ghc-standalone-archive = callPackage ../os-specific/darwin/ghc-standalone-archive { inherit (darwin) cctools; };
 
   messenger-for-desktop = callPackage ../applications/networking/instant-messengers/messenger-for-desktop {};
+
+  ibtool = callPackage ../os-specific/darwin/ibtool {};
 }