Changming Sun

**Description**: Move Linux-CPU-CI pipeline and training Linux CPU CI pipeline to github actions. This PR doesn't delete the old yaml file, which needs be done in another PR after talking...

Porting from Qt WebKit to Qt WebEngine

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Qt WebKit is removed from [QT 5.6](https://wiki.qt.io/New_Features_in_Qt_5.6). Here is a guide for how to port existing code. https://doc-snapshots.qt.io/qt5-5.6/qtwebenginewidgets-qtwebkitportingguide.html

# Bug Report ### Is the issue related to model conversion? NO ### Describe the bug When I compile ONNX from source on Ubuntu 18.04, I got tons of warnings...

**Description**: Update py-packaging-selectable-stage.yml to avoid having conflicts with our normal Linux CPU CI pull request pipeline. **Motivation and Context** - Why is this change required? What problem does it solve?...

Delete set-test-data-variables-step.yml

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**Description**: The file is not used. **Motivation and Context** - Why is this change required? What problem does it solve? - If it fixes an open issue, please link to...

# Bug Report ### Is the issue related to model conversion? No ### Describe the bug ONNX spec should explicitly say if each integer attribute value can be negative. For...

Update cpuinfo.h: add support for Windows ARM64EC

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To fix a build error: ``` src\arm\windows\init-by-logical-sys-info.c(309,17): Error C2065: 'cpuinfo_uarchs': undeclared identifier ``` In short, Arm64EC is a new application binary interface (ABI) for apps running on Arm devices with...

### Description Delete path.h and replace all occurrences of onnxruntime::Path with std::filesystem::path. Previously we couldn't use C++17's std::filesystem because it was not supported in iOS 12(which was released in 2018)....

This pull request upgrades the CMake version from v3.31.0-rc1 to v3.31.0-rc2 to include a bug fix for CUDA https://gitlab.kitware.com/cmake/cmake/-/merge_requests/9902 from Nvidia company. [AB#51692](https://aiinfra.visualstudio.com/6a833879-cd9b-44a4-a9de-adc2d818f13c/_workitems/edit/51692)

Remove nsync

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### Description 1. Remove the onnxruntime::OrtMutex class and replace it with ~absl::Mutex~ std::mutex. 2. After this change, most source files will not include indirectly. ### Motivation and Context To reduce...