MSYS2

Software Distribution and Building Platform for Windows

MSYS2 is a collection of tools and libraries providing you with an easy-to-use environment for building, installing and running native Windows software.

It consists of a command line terminal called mintty, bash, version control systems like git and subversion, tools like tar and awk and even build systems like autotools, all based on a modified version of Cygwin. Despite some of these central parts being based on Cygwin, the main focus of MSYS2 is to provide a build environment for native Windows software and the Cygwin-using parts are kept at a minimum. MSYS2 provides up-to-date native builds for GCC, mingw-w64, CPython, CMake, Meson, OpenSSL, FFmpeg, Rust, Ruby, just to name a few.

To provide easy installation of packages and a way to keep them updated it features a package management system called Pacman, which should be familiar to Arch Linux users. It brings many powerful features such as dependency resolution and simple complete system upgrades, as well as straight-forward and reproducible package building. Our package repository contains more than 2000 pre-built packages ready to install.

For more details see 'What is MSYS2?' which also compares MSYS2 to other software distributions and development environments like Cygwin, WSL, Chocolatey, Scoop, ... and 'Who Is Using MSYS2?' to see which projects are using MSYS2 and what for.

Installation

Download the installer: msys2-x86_64-20201109.exe

SHA256 checksum: 274a11559ede8b892da63dacab30dcf968b811fe21caccc9a1fb9137a5e56062
Run the installer. MSYS2 requires 64 bit Windows 7 or newer.
Enter your desired Installation Folder (short ASCII-only path, no accents, no spaces, no symlinks, no subst or network drives).
When done, tick Run MSYS2 now.

Update the package database and base packages. Unless your setup file is very recent, it will take two steps. First run pacman -Syu:

$ pacman -Syu
:: Synchronizing package databases...
 mingw32                        805.0 KiB
 mingw32.sig                    438.0   B
 mingw64                        807.9 KiB
 mingw64.sig                    438.0   B
 msys                           289.3 KiB
 msys.sig                       438.0   B
:: Starting core system upgrade...
warning: terminate other MSYS2 programs before proceeding
resolving dependencies...
looking for conflicting packages...

Packages (6) bash-5.1.004-1  filesystem-2021.01-1
             mintty-1~3.4.4-1  msys2-runtime-3.1.7-4
             pacman-5.2.2-9  pacman-mirrors-20201208-1

Total Download Size:   11.05 MiB
Total Installed Size:  53.92 MiB
Net Upgrade Size:      -1.24 MiB

:: Proceed with installation? [Y/n] Y
:: Retrieving packages...
 bash-5.1.004-1-x86_64            2.3 MiB
 filesystem-2021.01-1-any        33.2 KiB
 mintty-1~3.4.4-1-x86_64        767.2 KiB
 msys2-runtime-3.1.7-4-x86_64     2.6 MiB
 pacman-mirrors-20201208-1-any    3.8 KiB
 pacman-5.2.2-9-x86_64            5.4 MiB
(6/6) checking keys in keyring       100%
(6/6) checking package integrity     100%
(6/6) loading package files          100%
(6/6) checking for file conflicts    100%
(6/6) checking available disk space  100%
:: Processing package changes...
(1/6) upgrading bash                 100%
(2/6) upgrading filesystem           100%
(3/6) upgrading mintty               100%
(4/6) upgrading msys2-runtime        100%
(5/6) upgrading pacman-mirrors       100%
(6/6) upgrading pacman               100%
:: Running post-transaction hooks...
(1/1) Updating the info directory file...
      0 [main] pacman (42236) C:\msys64\usr\bin\pacman.exe: *** fatal error - cygheap base mismatch detected - 0x18034B408/0x180345408.
This problem is probably due to using incompatible versions of the cygwin DLL.
Search for cygwin1.dll using the Windows Start->Find/Search facility
and delete all but the most recent version.  The most recent version *should*
reside in x:\cygwin\bin, where 'x' is the drive on which you have
installed the cygwin distribution.  Rebooting is also suggested if you
are unable to find another cygwin DLL.
      0 [main] pacman 427 dofork: child -1 - forked process 42236 died unexpectedly, retry 0, exit code 0xC0000142, errno 11
error: could not fork a new process (Resource temporarily unavailable)
:: To complete this update all MSYS2 processes including this terminal will be closed. Confirm to proceed [Y/n] Y

The last error is expected and won't be an issue.

Run "MSYS2 MSYS" from Start menu. Update the rest of the base packages with pacman -Su:

$ pacman -Su
:: Starting core system upgrade...
 there is nothing to do
:: Starting full system upgrade...
resolving dependencies...
looking for conflicting packages...

Packages (20) base-2020.12-1  bsdtar-3.5.0-1
              [... more packages listed ...]

Total Download Size:   12.82 MiB
Total Installed Size:  44.25 MiB
Net Upgrade Size:       3.01 MiB

:: Proceed with installation? [Y/n] Y
[... downloading and installation continues ...]

Now MSYS2 is ready for you. You probably will want to install some tools and the mingw-w64 GCC to start compiling:

$ pacman -S --needed base-devel mingw-w64-x86_64-toolchain
warning: file-5.39-2 is up to date -- skipping
[... more warnings ...]
:: There are 48 members in group base-devel:
:: Repository msys
   1) asciidoc  2) autoconf  3) autoconf2.13  4) autogen
   [... more packages listed ...]

Enter a selection (default=all): all
:: There are 19 members in group mingw-w64-x86_64-toolchain:
:: Repository mingw64
   1) mingw-w64-x86_64-binutils  2) mingw-w64-x86_64-crt-git
   [... more packages listed ...]

Enter a selection (default=all): alll
resolving dependencies...
looking for conflicting packages...

Packages (123) docbook-xml-4.5-2  docbook-xsl-1.79.2-1
               [... more packages listed ...]
               m4-1.4.18-2  make-4.3-1  man-db-2.9.3-1
               mingw-w64-x86_64-binutils-2.35.1-3
               mingw-w64-x86_64-crt-git-9.0.0.6090.ad98746a-1
               mingw-w64-x86_64-gcc-10.2.0-6
               mingw-w64-x86_64-gcc-ada-10.2.0-6
               mingw-w64-x86_64-gcc-fortran-10.2.0-6
               mingw-w64-x86_64-gcc-libgfortran-10.2.0-6
               mingw-w64-x86_64-gcc-libs-10.2.0-6
               mingw-w64-x86_64-gcc-objc-10.2.0-6
               mingw-w64-x86_64-gdb-10.1-2
               mingw-w64-x86_64-gdb-multiarch-10.1-2
              [... more packages listed ...]

Total Download Size:    196.15 MiB
Total Installed Size:  1254.96 MiB

:: Proceed with installation? [Y/n] Y
[... downloading and installation continues ...]

To start building using the mingw-w64 GCC, close this window and run "MSYS MinGW 64-bit" from Start menu. Now you can call make or gcc to build software for Windows.
Check out the introduction page to learn which Start menu item to use when and which packages to install. Take look at Detailed MSYS2 install guide for troubleshooting and additional details on how to keep your MSYS2 up-to-date.

Authors and Contributors

Support and Contact

read our wiki
browse our package lists
search for and file issues for msys2 packages on GitHub
search for and file issues for mingw-w64 packages on GitHub
search for very old tickets on SourceForge
read and post to our mailing list
talk in our Gitter room
talk in our Discord server
talk in our IRC channel
follow our Twitter account
read older discussion on SourceForge
more links on our homepage on GitHub

Donations

Alexey Pavlov (@alexpux)

Webmoney transfer to the following webmoney wallets:

E271473533800
R691797957081
Z110171850957

To Paypal account: alexpux@gmail.com

To yandex.money: 41001429355429

Ray Donnelly (@mingwandroid)

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