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For Windows 11, the recommended way to install MinGW-w64 GCC is through MSYS2. MSYS2 provides the native Windows compiler, the mingw-w64 libraries, and the pacman package manager used to install and update them.
This guide uses the current UCRT64 environment. Older tutorials often use MINGW64 and the package name mingw-w64-x86_64-gcc; those instructions target the older MSVCRT-based environment and are not the best default for a new Windows 11 installation.
Before you begin
MSYS2 requires 64-bit Windows 10 version 1809 or newer, so a supported Windows 11 installation meets the host requirement. You should also have enough free disk space for GCC and its dependencies. The GCC package itself is currently listed at approximately 48.87 MB for download and 254.50 MB installed, before counting dependencies.
| Requirement | Recommendation |
|---|---|
| Windows version | 64-bit Windows 11 |
| Installation method | MSYS2 installer followed by pacman |
| Compiler environment | MSYS2 UCRT64 |
| Install location | C:msys64, or another short ASCII-only NTFS path |
| Compiler package | mingw-w64-ucrt-x86_64-gcc |
1. Download the correct MSYS2 installer
Open msys2.org and find the Installation section. Select the installer that matches your Windows processor:
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- Intel or AMD 64-bit:
msys2-x86_64-20260611.exe - Windows ARM64:
msys2-arm64-20260611.exe
The filename is an installer release identifier, not the GCC version. MSYS2 package versions are updated separately through pacman.
If Windows Defender SmartScreen displays a warning, verify that you downloaded the installer from the official MSYS2 site. For a new or less frequently downloaded release, SmartScreen may show an “unrecognized app” message. The documented way to continue is to click More info, then Run anyway.
Optional: verify the installer signature
For a higher-confidence download, verify the installer signature using GnuPG. The MSYS2 installer-signing primary-key fingerprint is:
0EBF 782C 5D53 F7E5 FB02 A667 46BD 761F 7A49 B0ECA successful verification must report Good signature, and the displayed primary fingerprint must match the fingerprint above. Do not treat a signature from an unrelated key as confirmation that the installer is genuine.
2. Install MSYS2
- Run the downloaded
.exeinstaller. - Enter the desired Installation Folder, or keep the recommended default.
- Complete the installation wizard.
- Click Finish.
The default location, C:msys64, is a good choice. If you select another folder, use a short path on an NTFS volume containing only ordinary ASCII characters. Avoid spaces, accented characters, symbolic links, subst drives, and network drives.
For example, this is suitable:
C:msys64A path such as the following can create avoidable problems:
C:UsersJöhn SmithDownloadsDevelopment Toolsmsys64Some build tools do not handle spaces or non-ASCII characters correctly. Long paths can also run into Windows’ traditional MAX_PATH limit of 260 characters. Enabling Windows long-path support does not guarantee that every compiler, library, or build script supports long paths.
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3. Open the MSYS2 UCRT64 terminal
After installation, MSYS2 normally launches a terminal for the UCRT64 environment. If it does not open automatically, open the Windows Start menu and select:
MSYS2 UCRT64MSYS2 has several environments, and the environment determines which compiler, runtime, libraries, and binary paths are used. If you are unsure which one to choose, MSYS2 recommends UCRT64.
| Environment | Purpose |
|---|---|
| UCRT64 | Current general-purpose native Windows environment using GCC, UCRT, and libstdc++ |
| MINGW64 | Older MSVCRT-based 64-bit environment; deprecated for new general-purpose use |
| MSYS | Unix-like MSYS tools; not the environment to use for a native MinGW Windows build |
MSYS2 changed its general default from MINGW64 to UCRT64 on October 29, 2022, and began deprecating MINGW64 on March 15, 2026. It also began phasing out 32-bit environments, including MINGW32, in December 2023. That is why a current Windows 11 guide should start with UCRT64 rather than a generic 32-bit MinGW installer.
4. Install the MinGW-w64 GCC toolchain
In the MSYS2 UCRT64 terminal, run this exact command:
pacman -S mingw-w64-ucrt-x86_64-gccWhen pacman displays:
:: Proceed with installation? [Y/n]Press Enter to accept the default yes response. The package manager will download GCC and install required dependencies.
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5. Confirm that GCC is installed
Remain in the same UCRT64 terminal and run:
gcc --versionYou should see GCC version information. The exact version may differ because MSYS2 updates packages independently of the installer.
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To display the installed MSYS2 package version specifically, run:
pacman -Qi mingw-w64-ucrt-x86_64-gcc | grep VersionIf the terminal reports gcc: command not found, check the following before reinstalling:
- Confirm that the window title or Start menu shortcut is MSYS2 UCRT64, not MSYS2 MSYS.
- Close and reopen the UCRT64 terminal after the installation.
- Run the package query command above to confirm that the GCC package is installed.
6. Compile a test C program
Create a file named hello.c in a convenient directory. For example:
#include <stdio.h>
int main(void) {
printf("Hello, Windows!n");
return 0;
}In the UCRT64 terminal, change to the directory containing the file. If the file is in a Windows folder such as C:UsersYourNameDocumentsc-test, the corresponding MSYS2 path is usually:
cd /c/Users/YourName/Documents/c-testCompile it with:
gcc hello.c -o hello.exeThis creates a native Windows executable named hello.exe. Run it from the same terminal with:
./hello.exeThe expected output is:
Hello, Windows!Why the UCRT64 terminal matters
The UCRT64 terminal configures its internal PATH so that /ucrt64/bin comes before /usr/bin. This ensures that commands such as gcc resolve to the UCRT64 native Windows compiler rather than the tools belonging to the MSYS environment.
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Also avoid mixing libraries or object files built for different C runtimes. MSVCRT and UCRT targets have differences in internal structures and data types. A project built for UCRT64 should use UCRT-compatible libraries and dependencies. UCRT is included with Windows 10 and later and generally provides better compatibility with modern Microsoft Visual C++ software.
Should you add MinGW to the Windows PATH?
Usually, no. The MSYS2 UCRT64 shortcut already sets the correct compiler path inside the MSYS2 terminal. Adding a random directory to the Windows system PATH can cause Windows, an IDE, or another terminal to invoke a different GCC installation.
The UCRT64 compiler binaries are under the MSYS2 installation directory’s:
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ucrt64binFor example, with the default installation, the physical folder is:
C:msys64ucrt64binUse the MSYS2 UCRT64 terminal when following MSYS2-based build instructions. If an IDE needs a compiler path, configure it deliberately for this toolchain rather than adding several MinGW, MSYS, and MINGW64 directories to PATH.
Common mistakes
| Problem | Correction |
|---|---|
Using pacman -S mingw-w64-x86_64-gcc |
Use pacman -S mingw-w64-ucrt-x86_64-gcc for the current UCRT64 setup. |
| Opening MSYS2 MSYS instead of UCRT64 | Launch MSYS2 UCRT64 from the Start menu. |
| Installing into a path with spaces or accents | Use the default C:msys64 or another short ASCII-only NTFS path. |
| Mixing MSVCRT and UCRT libraries | Keep the compiler, objects, static libraries, and dependencies on the same CRT target. |
| Following a 32-bit MinGW guide | Use the 64-bit UCRT64 environment unless a specific legacy project requires another target. |
Adding multiple compiler folders to Windows PATH |
Use the environment shortcut’s configured path and remove conflicting toolchain entries if necessary. |
Updating GCC later
MSYS2 is a rolling distribution, so installed packages can be updated through its package manager. Run updates from the appropriate MSYS2 terminal and follow any prompts shown by pacman. Do not assume that the version printed in an old tutorial or screenshot is still current.
If a project requires MINGW64/MSVCRT specifically, follow that project’s documented environment and dependency requirements. Otherwise, UCRT64 is the appropriate starting point for a new Windows 11 GCC installation.
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FAQ
Is MinGW the same thing as MSYS2?
No. MinGW-w64 is the native Windows compiler and runtime toolchain, while MSYS2 is the distribution and package-management environment used to install it. For a current setup, install MSYS2 and use pacman to install the UCRT64 GCC package.
Which MinGW package should I install on Windows 11?
For a new 64-bit Windows 11 setup, open the MSYS2 UCRT64 terminal and run pacman -S mingw-w64-ucrt-x86_64-gcc. The older mingw-w64-x86_64-gcc package belongs to the MINGW64/MSVCRT environment.
Can I use MSYS2 on Windows ARM64?
Yes. MSYS2 provides a Windows ARM64 installer. Download the ARM64 installer from the official MSYS2 Installation page. The Intel/AMD installer is for x86-64 Windows systems.
Do I need to add C:\msys64\ucrt64\bin to PATH?
Not when compiling inside the MSYS2 UCRT64 terminal. That shortcut configures the terminal’s internal path. Adding several compiler directories to Windows PATH can cause the wrong GCC or runtime environment to be selected.
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Why does gcc work in UCRT64 but not in MSYS2 MSYS?
The terminals represent different environments. UCRT64 adds /ucrt64/bin before /usr/bin, exposing the native UCRT64 compiler. The MSYS environment contains Unix-like tools and is not the normal shell for native MinGW Windows builds.
What is the difference between UCRT64 and MINGW64?
UCRT64 links against Microsoft’s Universal C Runtime and is the current recommended general-purpose environment. MINGW64 uses the older MSVCRT runtime and is being deprecated for new general-purpose installations. Use MINGW64 only when a project specifically requires MSVCRT compatibility.
The Bottom Line
Install MSYS2 from msys2.org, keep the recommended short installation path, open MSYS2 UCRT64, and run:
pacman -S mingw-w64-ucrt-x86_64-gccVerify the installation with gcc --version, then compile a test program using gcc hello.c -o hello.exe. This gives Windows 11 a current native GCC toolchain without mixing obsolete MINGW64, MSYS, or 32-bit configurations.
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