msvc-dev-cmd

GitHub Action for configuring Developer Command Prompt for Microsoft Visual C++.

This sets up the environment for compiling C/C++ code from command line.

Supports Windows. Does nothing on Linux and macOS.

Inputs

arch – target architecture
- native compilation:
  - x64 (default) or its synonyms: amd64, win64
  - x86 or its synonyms: win32
- cross-compilation: x86_amd64, x86_arm, x86_arm64, amd64_x86, amd64_arm, amd64_arm64
sdk – Windows SDK to use
- do not specify to use the default SDK
- or specify full Windows 10 SDK number (e.g, 10.0.10240.0)
- or write 8.1 to use Windows 8.1 SDK
toolset – select VC++ compiler toolset version
- do not specify to use the default toolset
- 14.0 for VC++ 2015 Compiler Toolset
- 14.XX for the latest 14.XX toolset installed (e.g, 14.11)
- 14.XX.YYYYY for a specific full version number (e.g, 14.11.25503)
uwp – set true to build for Universal Windows Platform (i.e., for Windows Store)
spectre – set true to use Visual Studio libraries with Spectre mitigations

Example usage

jobs:
  test:
    - uses: actions/checkout@v1
    - uses: ilammy/msvc-dev-cmd@v1
    - name: Build something requiring CL.EXE
      run: |
        cmake -G "NMake Makefiles" .
        nmake
    # ...

Caveats

Name conflicts with `shell: bash`

Using shell: bash in Actions may shadow some of the paths added by MSVC. In particular, link.exe (Microsoft C linker) is prone to be shadowed by /usr/bin/link (GNU filesystem link tool).

Unfortunately, this happens because GitHub Actions unconditionally prepend GNU paths when shell: bash is used, on top of any paths set by msvc-dev-cmd, every time at the start of each new step. Hence, there aren't many non-destructive options here.

If you experience compilation errors where link complains about unreasonable command-line arguments, “extra operand something-something” – that's probably it. Recommended workaround is to remove /usr/bin/link if that interferes with your builds. If this is not acceptable, please file an issue, then we'll figure out something better.

License

MIT, see LICENSE.

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