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• 26.02.21 4236eba4e6

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  Version 26.02.21 Stable

  seppdroid released this 2026-02-21 17:46:13 +01:00 | 0 commits to main since this release

  Download cowc.rs and install the rust toolset: https://rust-lang.org/tools/install/

  Build cowc

  rustc -O cowc.rs -o cowc
  

  Compile a .cow program (native)

  ./cowc hello.cow -o hello
  

  Keep the generated Rust (helpful for inspection/debugging):

  ./cowc hello.cow --keep-rs -o hello
  

  Only emit Rust and stop:

  ./cowc hello.cow --emit-rs -o hello
  

  Cross-compiling

  Install the target:

  rustup target add x86_64-pc-windows-gnu
  

  Compile:

  ./cowc --target x86_64-pc-windows-gnu hello.cow -o hello.exe
  

  Notes:

  • Cross targets require the Rust std components for that target.
  • Some targets also require a system linker/toolchain; rustc will tell you if something is missing.

  Max performance

  After running the benchmarks, it turns out that fat LTO doesn’t provide any real benefit for most COW applications.

  You can enable it with the LTO flag

  ./cowc hello.cow --lto -o hello
  

  In the previous version, output was automatically buffered and only written when the program finished for performance.
  This is now an optional flag, since the behavior made some programs unusable. See the issue here

  ./cowc hello.cow --vec-stdout -o hello
  

  For host builds, keep the default native CPU tuning (-C target-cpu=native). Disable it with:

  ./cowc hello.cow --no-native-cpu -o hello
  

  Downloads

  • Source Code (ZIP)
  • Source Code (TAR.GZ)