Merge pull request #14376 from acowley/qhull

qhull: darwin compatibility

pkgs/development/libraries/qhull/default.nix

···
 
   cmakeFlags = "-DMAN_INSTALL_DIR=share/man/man1 -DDOC_INSTALL_DIR=share/doc/qhull";
 
+  patchPhase = stdenv.lib.optionalString stdenv.isDarwin ''
+    sed -i 's/namespace std { struct bidirectional_iterator_tag; struct random_access_iterator_tag; }/#include <iterator>/' ./src/libqhullcpp/QhullIterator.h
+    sed -i 's/namespace std { struct bidirectional_iterator_tag; struct random_access_iterator_tag; }/#include <iterator>/' ./src/libqhullcpp/QhullLinkedList.h
+  '';
+
   meta = {
     homepage = http://www.qhull.org/;
     description = "Computes the convex hull, Delaunay triangulation, Voronoi diagram and more";