Download Latest Version Cosmopolitan v4.0.2 source code.tar.gz (44.1 MB)
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Name Modified Size InfoDownloads / Week
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cosmopolitan-4.0.2.tar.gz 2025-01-05 44.1 MB
1 1 weekly downloads
cosmocc-4.0.2.zip 2025-01-05 441.8 MB
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cosmos-4.0.2.zip 2025-01-05 402.7 MB
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Cosmopolitan v4.0.2 source code.tar.gz 2025-01-05 44.1 MB
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Cosmopolitan v4.0.2 source code.zip 2025-01-05 54.4 MB
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README.md 2025-01-05 2.1 kB
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Totals: 6 Items   987.1 MB 4

Cosmopolitan Libc makes C/C++ a build-once run-anywhere language, like Java, except it doesn't need an interpreter or virtual machine. Instead, it reconfigures stock GCC and Clang to output a POSIX-approved polyglot format that runs natively on Linux + Mac + Windows + FreeBSD + OpenBSD 7.3 + NetBSD + BIOS with the best performance and reliability.

Cosmo v4.0.2 Release Notes

After testing 4.0.x with various programs and hammering out the remaining issues, this release includes the latest build of Cosmos. We've confirmed bash, emacs, vim, git, links, wget, etc. work well across platforms.

  • 29eb7e67b Fix fork() regression on Windows
  • 42a3bb729 Make execve() linger when it can't spoof parent
  • f0b0f926b Enable sqlite3 serialization in redbean (#1349)
  • 035b0e2a6 Attempt to fix MODE=dbg Windows execve() flake
  • 7b67b20da Fix Windows MODE=tiny breakage
  • c97a85847 Remove missing definitions

Read the documentation:

Redundant download URLs are provided:

  • https://cosmo.zip/pub/cosmos/v/4.0.2/
  • https://cosmo.zip/pub/cosmos/zip/cosmos-4.0.2.zip
  • https://cosmo.zip/pub/cosmocc/cosmocc-4.0.2.zip
  • https://cosmo.zip/pub/cosmo/cosmopolitan-4.0.2.tar.gz
  • https://justine.lol/cosmopolitan/cosmocc-4.0.2.zip
  • https://justine.lol/cosmopolitan/cosmos-4.0.2.zip
  • https://justine.lol/cosmopolitan/cosmopolitan-4.0.2.tar.gz

Known issues:

  • You might need our binfmt_misc interpreter with some Linux distros
  • Run Windows Terminal Preview with admin privileges to use symlinks
  • Use TERM=vt100 nano to fix frozen display state with nano editor
  • Self-modifying code isn't preserved across fork() on Windows
  • Function tracing is disabled in child after fork() on Windows
  • Z shell users need zsh 5.9+ which fixes an execve() bug
Source: README.md, updated 2025-01-05