Source snapshot · 6 November 2026

Linux and Windows builds¶

On Linux the bundle scripts run natively and produce CLAP, VST3 and LV2 bundles (AAX is built on macOS and Windows only):

python3 scripts/bundle-clap.py --plugin delay        # target/clap/release/RAVET Delay.clap
python3 scripts/bundle-vst3.py --plugin delay --sdk /path/to/vst3sdk
python3 scripts/bundle-lv2.py --plugin delay --sdk /path/to/lv2

The CLAP bundle on Linux and Windows is the product library itself, renamed to <Name>.clap. Editor products need GTK 3, WebKitGTK 4.1 and JSON-GLib development packages on Linux, and on Windows the WebView2 SDK at build time (RAVET_WEBVIEW2_SDK, an extracted Microsoft.Web.WebView2 NuGet package; see bundle tool) and the WebView2 Runtime on the user's machine. MSVC builds link the SDK's static loader, so no WebView2Loader.dll ships in any bundle.

Windows cross-builds¶

--target windows on bundle-clap.py, bundle-vst3.py, bundle-lv2.py and bundle-aax.py builds the x86_64 Windows bundles from Linux (or macOS) (decision 0285):

# Once: cargo-xwin and the Windows target. The first cargo-xwin run downloads
# Microsoft's CRT and Windows SDK and asks you to accept their licence.
cargo install --locked cargo-xwin
rustup target add x86_64-pc-windows-msvc
# Also needed: CMake, clang (clang-cl), and Wine for LV2 (optional otherwise).

python3 scripts/bundle-clap.py --plugin delay --target windows
python3 scripts/bundle-vst3.py --plugin delay --sdk /path/to/vst3sdk --target windows
python3 scripts/bundle-lv2.py --plugin delay --sdk /path/to/lv2 --target windows
python3 scripts/bundle-aax.py --plugin delay --aax-sdk /path/to/AAX_SDK --target windows

Format	Windows bundle	Windows check to run there
CLAP	`target/clap/windows/release/RAVET Delay.clap`	`clap-validator.exe validate "RAVET Delay.clap"`
VST3	`target/vst3/generic/delay/windows-release/VST3/Release/ravet_delay_vst3.vst3`	`validator.exe` from that build's `bin/`
LV2	`target/lv2/windows/ravet_delay.lv2`	`ravet_lv2_contracts.exe` from `target/lv2/windows/generic-ravet_delay/`
AAX	`target/aax-plugin/windows-delay/RAVET Delay.aaxplugin`	`ravet_aax_check.exe` from the same directory (not Avid's validator)

How it works:

Rust is built with cargo xwin build|rustc --target x86_64-pc-windows-msvc. The C++ adapters are configured with -DCMAKE_TOOLCHAIN_FILE=scripts/cmake/windows-xwin.cmake, which wraps cargo-xwin's clang-cl toolchain file and restores the Windows system libraries it clears. The scripts take PATH and that toolchain's location from cargo xwin env; CMake's default generator (Makefiles) is used.
The C runtime is linked statically on both sides (Rust -C target-feature=+crt-static, C++ /MT), so bundles and the cross-built tools need only system DLLs and run on Windows without the Visual C++ Redistributable.
Programs that must run at build time run under Wine (CMAKE_CROSSCOMPILING_EMULATOR): the LV2 Turtle generator (required) and the contract tests (skipped without Wine). Format validators are not run on the build machine.
The VST3 SDK's Windows folder-icon step calls attrib; the scripts put a no-op attrib on PATH, so the bundle folder's system attribute is not set.

The official clap-validator Windows release needs the Visual C++ Redistributable; on a Windows installation without it, build clap-validator from source with cargo xwin build --release --target x86_64-pc-windows-msvc and CARGO_TARGET_X86_64_PC_WINDOWS_MSVC_RUSTFLAGS="-C target-feature=+crt-static". Native Windows builds (MSVC) use the commands in each format's guide; they have not been run. Evidence for both platforms is in work status.