root5: fix build

pkgs/applications/science/misc/root/5.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, cmake, pcre, pkgconfig, python2
+{ stdenv, fetchurl, fetchpatch, cmake, pcre, pkgconfig, python2
 , libX11, libXpm, libXft, libXext, libGLU_combined, zlib, libxml2, lzma, gsl_1
 , Cocoa, OpenGL, cf-private, noSplash ? false }:
 
@@ -19,11 +19,30 @@ stdenv.mkDerivation rec {
 
   patches = [
     ./sw_vers_root5.patch
+
+    (fetchpatch {
+      name = "enable_new_gcc.patch";
+      url = "https://aur.archlinux.org/cgit/aur.git/plain/enable_new_gcc.patch?h=root5&id=91c50876081a0af36f84ec4f0f9dba869107fa4f";
+      sha256 = "1rnp0xlw0yqi7mjs4w145njd79i8kkir1qik7zwicdik9axf8ygm";
+    })
+
+    # prevents rootcint from looking in /usr/includes and such
+    ./purify_include_paths_root5.patch
+
+    # disable dictionary generation for stuff that includes libc headers
+    # our glibc requires a modern compiler
+    ./disable_libc_dicts_root5.patch
   ];
 
   preConfigure = ''
     patchShebangs build/unix/
     ln -s ${stdenv.lib.getDev stdenv.cc.libc}/include/AvailabilityMacros.h cint/cint/include/
+  ''
+  # Fix CINTSYSDIR for "build" version of rootcint
+  # This is probably a bug that breaks out-of-source builds
+  + ''
+    substituteInPlace cint/cint/src/loadfile.cxx\
+      --replace 'env = "cint";' 'env = "'`pwd`'/cint";'
   '' + stdenv.lib.optionalString noSplash ''
     substituteInPlace rootx/src/rootx.cxx --replace "gNoLogo = false" "gNoLogo = true"
   '';
@@ -73,8 +92,5 @@ stdenv.mkDerivation rec {
     description = "A data analysis framework";
     platforms = platforms.unix;
     maintainers = with maintainers; [ veprbl ];
-    # needs to be adapted to work with modern glibc
-    # it works on darwin by impurely picking up system's libc headers
-    broken = stdenv.isLinux;
   };
 }