I keep getting this warning when building PyTorch:

```
In file included from
/home/hong/wsrc/pytorch/third_party/onnx/onnx/defs/tensor/utils.h:6,
                 from
/home/hong/wsrc/pytorch/third_party/onnx/onnx/defs/tensor/defs.cc:4:
/home/hong/wsrc/pytorch/third_party/onnx/onnx/defs/tensor/defs.cc: In
lambda function:
/home/hong/wsrc/pytorch/third_party/onnx/onnx/defs/tensor/defs.cc:1414:22:
warning: unnecessary parentheses in declaration of �i�
[-Wparentheses]
           for (size_t(i) = 0; i < axes.size(); ++i) {
                      ^
/home/hong/wsrc/pytorch/third_party/onnx/onnx/defs/schema.h:959:12:
note: in definition of macro �ONNX_OPERATOR_SET_SCHEMA_EX�
     return impl.SetName(#name)
\
            ^~~~
/home/hong/wsrc/pytorch/third_party/onnx/onnx/defs/tensor/defs.cc:1369:1:
note: in expansion of macro �ONNX_OPERATOR_SET_SCHEMA�
 ONNX_OPERATOR_SET_SCHEMA(
```

This commit should fix it and modernize the code a bit.

Co-authored-by: Ke Zhang <kezhan@microsoft.com>

* Adagrad draft

* MIMO

* Support multiple tensors to be optimized

* Address comments

* Move optimizers to a new place

Remove copied

Add momentum

Save

Remove momentum

Fix

Move constants to attributes

* Fix build

* Add shape test

Add two node tests

Update test coverage

* Fix shape inf

* Fix shape inf

* fix shape inf

* Format

* Add function type

* Merge lines

* Format

* Fix version number

* Update op version in model files

* Fix a test function and update related test files

* Update onnx/backend/test/case/node/adagrad.py

* Remove unused file

* sync docs

* Fix shape test

* sync doc

* sync with master

* Update onnx/defs/training/defs.cc

Co-Authored-By: Michał Karzyński <postrational@users.noreply.github.com>

* sync doc

* address comments

* address a minor comment

* Polish one line

Co-authored-by: Michał Karzyński <postrational@users.noreply.github.com>

* SG with Momentum

* Registrate Op

Fix

Update other docs

* Add shape inference code and polish definition

* Update docs

* Add test cases and fix several bugs

* Remove accidently added copy

* Alpha -> alpha & Beta -> beta

* Clarify an attribute

* Fix an attribute

* Fix bug

* Fix missing attributes

* sync doc

* Remove unused domain

* sync with master

Co-authored-by: Chin Huang <chhuang@us.ibm.com>

… spec. (onnx#2667)

* Update Pow input types in Opset 12

* gen doc and tests

* remove uints and 8 bit ints

* add tests

* remove uint int x tets

* adding an osx build, linux build, with and without onnx_ml for debug mode

* test debug mode with ONNX_ML=1

Co-authored-by: G. Ramalingam <grama@microsoft.com>

* Update Batchnorm test

* relax shape inference on scalar

…fied (onnx#2675)

* Update sequence test case to input is not scalar and splits are specified

* Add spaces to make the checker happy

https://cmake.org/cmake/help/latest/module/GNUInstallDirs.html
this make allow install the libraries (and headers) in different location than `lib` (Gentoo uses lib64 for 64-bits libs)
also change the .cmake files for avoid conclicts if build both 32-bis and 64-bits (avoids conflict/overwrite files)

Co-authored-by: Ke Zhang <kezhan@microsoft.com>

…NLLLoss. (onnx#2680)

* Add 'ignore_index' input in the spec for SoftmaxCrossEntropyLoss and NLLLoss.

* Add tests.

* build break.

* build break.

* clean up.

* build break.

* Change ignore_index to attribute.

* Change ignore_index to attribute.

* PR feedback.

* PR feedback.

* Make ignore_index optional in NLLLoss.

* Build break.

* remove trailing spaces to fix build break.

* Build break.

* Update spec doc.

* Fix NLLLoss function definition to fix test: test_negative_log_likelihood_loss_input_shape_is_NCd1d2_with_weight_reduction_sum_ignore_index_expanded

* PR feedback.

* Fix test for softmax cross entropy loss to exclude ignored_index'ed weights from the sum of weights.

* Build break.

Change version number for release verification