build DCNv2 error

[Jenny0420]

my sys:
ubuntu 18.04
torch : 1.8.1+cu102
cuda : 10.2

run python setup.py build develop

ERROR:
csrc/cpu/dcn_v2_psroi_pooling_cpu.cpp:16:10: fatal error: ATen/ceil_div.h: Noshuch file or directory
#include <ATen/ceil_div.h>
compilation terminated
error: command "g++" failed with exit status 1

[kaggar11]

I fixed this issue by using the DCNv2 src from the following repo.
[https://gitcode.net/l_d_x/DCNv2_latest/-/tree/master/src]