fetch-vcruntime.md

Obtaining the Microsoft Visual C++ runtime DLLs

Games built with MSVC need the Visual C++ runtime. Those DLLs are authored by Microsoft and are not redistributable under this project's license, so they are not committed here. You supply them yourself.

Fourteen files are expected in app/Madeira/x86_64-vcruntime/, the twelve C++ runtime DLLs and MFC's two from the same package (madeira-bcd, 2026-10-09: Horizon Zero Dawn imports mfc140.dll; env.MADEIRA_MFC = 0 keeps MFC out of a game's system32):

concrt140.dll              msvcp140_codecvt_ids.dll   vcruntime140.dll
msvcp140.dll               vcamp140.dll               vcruntime140_1.dll
msvcp140_1.dll             vccorlib140.dll            vcruntime140_threads.dll
msvcp140_2.dll             vcomp140.dll               mfc140.dll
msvcp140_atomic_wait.dll                              mfc140u.dll

How to get them

You can run the fetch helper script:

./tools/fetch-vcruntime.sh

Or manually download the official x64 redistributable from Microsoft (VC_redist.x64.exe) and extract it. On macOS, 7-Zip can do this:

brew install sevenzip
7zz x VC_redist.x64.exe -o/tmp/vcredist
7zz x /tmp/vcredist/.rsrc/1033/CABINET/*.cab -oapp/Madeira/x86_64-vcruntime

Exact layout varies by redistributable version; the goal is simply the fourteen files above, byte-for-byte as Microsoft shipped them.

Do not modify them

Microsoft's redistribution permission covers the eligible files unmodified. In particular, do not strip Authenticode signatures. You can check that the files still carry their signature payload using the host test:

python3 tests/host/check-vcruntime.py --strict

A file whose certificate offset equals its own length has had the signature truncated off and is no longer an unmodified Microsoft binary.