85b7463 change def of reducer to take function ptr fe6366e add engine base a98720e more deps git-subtree-dir: subtree/rabit git-subtree-split: 85b746394e
85b7463
fe6366e
a98720e
85b746394e
c7282ac
git-subtree-dir: subtree/rabit git-subtree-split: c7282acb2a
c7282acb2a