root: fix darwin build

Author: veprbl

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

@@ -223,6 +223,9 @@ stdenv.mkDerivation rec {
     ]}"
   '';
 
+  # error: aligned allocation function of type 'void *(std::size_t, std::align_val_t)' is only available on macOS 10.13 or newer
+  CXXFLAGS = lib.optional (stdenv.hostPlatform.system == "x86_64-darwin") "-faligned-allocation";
+
   # To use the debug information on the fly (without installation)
   # add the outPath of root.debug into NIX_DEBUG_INFO_DIRS (in PATH-like format)
   # and make sure that gdb from Nixpkgs can be found in PATH.