72 lines
3.8 KiB
Markdown
72 lines
3.8 KiB
Markdown
# Toolchain and execution profiles
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Faset uses C++20 without compiler extensions. Dependencies are pinned by commit and
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archive SHA-256 in `dependencies.lock.json`; Slang is pinned to **2026.18** by
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`tools/fetch_slang.py`. Changing these inputs is a deliberate SDK change. Editor
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plugins additionally require the exact generated build fingerprint, including
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compiler, platform, CRT, configuration, dependencies and SDK source identity.
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## Observed compiler profiles
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- **Linux development:** Ubuntu 26.04, x86-64, Clang **21.1.8**, CMake **4.2.3**,
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Ninja, glibc **2.43**. Native Editor, GPU tests, gameplay and exports execute here.
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- **Linux CI:** Ubuntu 24.04, x86-64, Clang **18.1.3**. The headless CPU suite and
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manual run on this profile. It is not evidence for desktop rendering on that runner.
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- **Windows CI:** Windows Server 2025 runner, x86-64, clang-cl **20.1.8**,
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MSVC toolset **14.51.36231**, Windows SDK **10.0.26100.0**. Headless tests have
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passed. Full Editor, software Vulkan and Release-package acceptance are tracked
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separately in the implementation log until that job completes.
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These are recorded validation profiles, not a claim that every intermediate Clang
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release or every supported Windows desktop has been tested. The presets deliberately
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use the compiler available on PATH so local installations remain practical. CI
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configuration output records the actual detected versions; runner image upgrades
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must be reviewed against this baseline. CMake **3.25** is the declared minimum, not
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the exact version used in every recorded run.
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MSVC-family builds use the dynamic CRT: `/MDd` in Debug, `/MD` otherwise. Physics,
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Player, Editor and native plugins use compatible settings. Development and export
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have separate CMake directories, avoiding accidental Debug/Release mixing.
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## Graphics profiles
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The baseline requires Vulkan 1.3 with dynamic rendering and synchronization2, a
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graphics queue, the renderer's color/depth format usages and limits, and presentation
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support for a native window. The backend checks these requirements before creating
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resources. It does not require hardware ray tracing, mesh shaders or descriptor
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indexing. Timestamp availability is queried; unavailable GPU timings are reported
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as unavailable rather than zero.
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- **Physical Linux GPU:** NVIDIA GeForce RTX 2080 Ti, driver **595.84**, reported
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Vulkan **1.4.329**. Tests request `VK_LAYER_KHRONOS_validation` and report whether
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the layer actually activated. This machine runs both Wayland window and offscreen
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scenarios.
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- **Software Vulkan:** official SwiftShader and Vulkan Loader sources are pinned
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with archive hashes in `tools/ci/prepare_windows_vulkan.py`. This profile checks
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API execution and output pixels on Windows CI. It is CPU rendering and is not a
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physical GPU performance benchmark. The bootstrap does **not** install validation
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layers, so its zero error counter must not be described as validation-layer proof.
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The measured physical GPU is one verified device, not an exhaustive compatibility
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matrix. Additional AMD/Intel GPUs, Windows desktop drivers and display configurations
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need their own execution records.
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## Offline preparation
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Before disconnecting, install the native toolchain and platform development packages,
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fetch Slang, and run:
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```sh
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python3 tools/fetch_dependencies.py
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python3 tools/fetch_dependencies.py --verify-only
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```
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Preserve `.cache/downloads`, `.cache/slang`, compilers, CMake/Ninja, Python and system
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SDK/libraries. A fresh source checkout can then configure and build without fetching
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third-party sources. Runtime exports require only their documented target runtime
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and graphics driver; they do not need this development toolchain.
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An offline build is recorded only after a clean build directory is configured and
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built with network access disabled. A warm incremental build or archive checksum
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verification alone is not that acceptance check.
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