root5: fix for gcc10

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

···
     # disable dictionary generation for stuff that includes libc headers
     # our glibc requires a modern compiler
     ./disable_libc_dicts_root5.patch
+
+    (fetchpatch {
+      name = "root5-gcc9-fix.patch";
+      url = "https://github.com/root-project/root/commit/348f30a6a3b5905ef734a7bd318bc0ee8bca6dc9.diff";
+      sha256 = "0dvrsrkpacyn5z87374swpy7aciv9a8s6m61b4iqd7a956r67rn3";
+    })
+    (fetchpatch {
+      name = "root5-gcc10-fix.patch";
+      url = "https://github.com/root-project/root/commit/3c243b18768d3c3501faf3ca4e4acfc071021350.diff";
+      sha256 = "1hjmgnp4zx6im8ps78673x0rrhmfyy1nffhgxjlfl1r2z8cq210z";
+    })
   ];
 
   preConfigure = ''

pkgs/top-level/all-packages.nix

···
 
   root5 = lowPrio (callPackage ../applications/science/misc/root/5.nix {
     inherit (darwin.apple_sdk.frameworks) Cocoa OpenGL;
-    stdenv = if stdenv.cc.isClang then llvmPackages_5.stdenv else gcc8Stdenv;
+    stdenv = if stdenv.cc.isClang then llvmPackages_5.stdenv else stdenv;
   });
 
   rink = callPackage ../applications/science/misc/rink {