fix LLVM packages to work in darwin stdenv

pkgs/development/interpreters/perl/5.22/default.nix

@@ -59,9 +59,14 @@ stdenv.mkDerivation rec {
 
   enableParallelBuilding = true;
 
+  postPatch = ''
+    pwd="$(type -P pwd)"
+    substituteInPlace dist/PathTools/Cwd.pm \
+      --replace "pwd_cmd = 'pwd'" "pwd_cmd = '$pwd'"
+  '';
+
   preConfigure =
     ''
-
       configureFlags="$configureFlags -Dprefix=$out -Dman1dir=$out/share/man/man1 -Dman3dir=$out/share/man/man3"
 
       ${optionalString stdenv.isArm ''

pkgs/development/interpreters/perl/5.22/no-libutil.patch

@@ -1,12 +1,14 @@
-diff -ru -x '*~' perl-5.14.2-orig/Configure perl-5.14.2/Configure
---- perl-5.14.2-orig/Configure	2011-09-26 11:44:34.000000000 +0200
-+++ perl-5.14.2/Configure	2012-02-16 17:24:50.779839039 +0100
-@@ -1368,7 +1368,7 @@
+diff --git a/Configure b/Configure
+index 0a405d3..1871298 100755
+--- a/Configure
++++ b/Configure
+@@ -1455,7 +1455,7 @@ libswanted_uselargefiles=''
  : List of libraries we want.
  : If anyone needs extra -lxxx, put those in a hint file.
- libswanted="socket bind inet nsl nm ndbm gdbm dbm db malloc dl ld sun"
--libswanted="$libswanted m crypt sec util c cposix posix ucb bsd BSD"
-+libswanted="$libswanted m crypt sec c cposix posix ucb bsd BSD"
+ libswanted="cl pthread socket bind inet nsl nm ndbm gdbm dbm db malloc dl ld"
+-libswanted="$libswanted sun m crypt sec util c cposix posix ucb bsd BSD"
++libswanted="$libswanted sun m crypt sec c cposix posix ucb bsd BSD"
  : We probably want to search /usr/shlib before most other libraries.
  : This is only used by the lib/ExtUtils/MakeMaker.pm routine extliblist.
  glibpth=`echo " $glibpth " | sed -e 's! /usr/shlib ! !'`
+