* fix eval_if_exist_else_none bug

* fix typo

* fix typo

* fix test_op_num unittest

* remove remove_unsupport_dtype

* remove remove_unsupport_dtype

* remove test dtype

* add more include

* change dtype.h's enum as enum class to avoid conflict with inference lib

* make enum as enum class

* remove additional test

* merge develop

* polish code

* Support Incremental compilation and Add Version management

* replace hash with hashlib

* split build op marco & polish details

* revert register api del

* fix other unittest

* add unittest for static/dygraph/dy2stat

* add PE unittet

* remove usless code

* add unittest in CMakeList.txt

Change-Id: I6210ce9c60bed48f3323c47b16500302b66cedf2

* add int pad support for Pad1D/2D/3D

* fix type

* fix format

* add cache for VariableWrapper

* modify args names and vlog level

* format code style

* add log when set cache to variable_wrapper

* add log when set cache to variable_wrapper

* add comment to variableWrapper cache

* format code style

* add cpp_extension en doc

* remove cuda_cflags and add optional in doc

* refine style

* fix indent problem

* add default None

* add simple attr support and test

* add int, float attr support

* support other attribute

* add custom attrs test in cmake

* polish details

* fix test failed

* add backward test

* update test flags

* revert the modification of set_expected_place

* set device before op run

* add ut

* update, test=develop

* update, test=develop

* push multi node

* multi node

* MultiThread

* remove log

* solve bug in 30829

* add get_cublas_handle() api

* update format

* add unittests

* alter function name

* split cxx/nvcc compile flags

* enhance input argument check

* rename extra_cflags into extrac_cxx_flags

* add name checking in setup

* fix test_dispatch failed

* fix word typo and rm usless import statement

* refine import statement

* fix unittest failed

* fix cuda flags error

test=document_fix

* add group norm plugin

* fix compile problems

* move concat axis check to trt op teller

* add nbDims for scale and bias nv dims

* add group norm unit test

* fix unittest

* add trt version restriction for group norm op teller

* fix unittest

* add new custom op so

* fix use new method error

* fix test failed

* fix entry

* fix distributed lookup table fuse case

* fix entry bug at first time

* move entry from paddle.fluid -> paddle.distributed

* fix ut with paddle.enable_static()
Co-authored-by: Nmalin10 <malin10@baidu.com>

* split build directory for each setup.py

* fix template string

* fix some problem of Windows custom op

* fix some problem of Windows custom op

* fix some problem of Windows custom op

* add error msg when dtypes of operator are not same

* add error msg when dtypes of operator are not same

* change error msg to warning msg when dtypes of operator are not same

* modify test case to fit for python2