* fix windows build

* wip

* mkldnn seems to build

* address various errors building cpu backend with MSVC

* wip

* wip

* IntelGPU backend: Use new clDNN version 12.1

* PR2280. Comments addressed

* Allow external mklml outside of prebuilt mkldnn install directory.

* Limit prebuilt mkl-dnn support to Linux.

* update licenses for 2019

* style

* Forward nGraph's C/C++ compiler, build type and generator information to cmake based external projects.

* Fix typo.

* Pass generator related info properly.

* Googletest is using DEBUG_POSTFIX

* TBB uses postfix for debug lib.

* Fix typo.

* update build byproducts to support ninja

* remove unused cmake code

* more cmake cleanup

* display error message if Ninja generator is requested

* fix mkldnn ext project

* revert onnx cmake file

* revert protobuf cmake file

* revert mlsl cmake file

* more fixing

* files pulled from bob/winbuild

* fix compile problems

* fix a few windows build errors

* add windows file to exclude from git

* add comment why change was made

* revert obsolete change

* more cleanup

* building interpreter and unit test on windows with DLLs

* Add flag for windows to export all symbols. Short term fix.

* enable MD build

* address warnings

* dump all windows build results to a single directory

* fix windows backend dll open issue

* remove debug

* fix file iterator for windows

* fix merge error

* fix test failure

* change header from h to hpp in hopes of making python happy

* address more linux build issues

* fix visibility enable

* IntelGPU backend: Use clDNN matrix operations for nGraph::Dot

* Update unit_test.manifest

* wip

* wip

* style check checking

* try cmake version of check/apply style

* update style check to print list of files in error

* cleanup

* Update MKLDNN v0.16 -> v0.17

* Updated SHA1 for mac and win

* Updated from 0.17-rc -> 0.17

* Patch to treat OMP as warning instead of error

* Fixed compile error for clang

* Commbined 2 patches into 1 file; renamed file to .patch

* Corrected file permissions

* build seems to work

* cleanup

* add backsuport for using pre-built clDNN library

* fix typo

* more sdl changes

* more fixes

* update SDL

* cleanup

* cleanup

* rename var

* redo how in_transition is handled

* add -O2 flag back

Replaced the git command 'ls-repote --tags' with  which produces the same output but works for clones without branches (#2066)

* fix gtest abi build

* fix llvm build with abi flag

* remove debug

* add check for conflicting flags in cmake

* add nop backend

* nop backend

* fix flag name

* add new switch to cmake output of switch settings

* add new unit test to igpu manifest

* remove redundant test

* address issues which surface with clang 6.0

* revert changes due to new clang warning and disable new warning

* Add missing halide dependency

* Bug fix in halide op creation

* Localize halide/llvm to cpu backend

* Added comments

* Pass NGRAPH_HALIDE to tests

* Resolve merge conflicts

* Update "JSON for Modern C++" to a version that officially supports gcc 4.8

* "JSON for Modern C++" is header only and does not need to be configured.

* Move to TBB2019 and bug fix to capture functor

* Change to use TBB release tag

* remove lightweight from codegen

* Enable TBB flow graph tracing

* move backend specific test files to test/backend directory

* remove unit_test_control

* move tests back to test root

* fix comment

* wip

* fix manifest

* fix CPU dependency

* wip

* wip

* serializer update to use op_tbl

* fix deserialize

* remove Remainder

* Move to MKLDNN v0.16. Git hash picks up some bug fixes post v0.16

* Temporary workaround for an MKLDNN bug

* onnxifi: upgrade libonnx
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* onnx: upgrade libonnx to version 1.3
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* onnx: upgrade to version 1.3 pre-release
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* onnx: fix to specific commit from master branch
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* fix style