December 2023 – firoDj

Untuk platform Windows saat ini (end of 2023) CGO golang bisa di-compile menggunakan GCC tetapi tidak pada Vistual Studio 2022. Sehingga perlu untuk install gcc toolchain pada MSYS2/UCRT64.

Installing GCC Toolchain

$ pacman -S --needed base-devel mingw-w64-ucrt-x86_64-gcc

Install golang

Method 1: Using msys2 golang, but the version may be not updated.

$ pacman -S mingw-w64-ucrt-x86_64-go

Update windows GOROOT environment: C:\msys64\ucrt64\lib\go
Update windows GOPATH environment: %USERPROFILE%\go
Append windows PATH environment: %USERPROFILE%\go\bin

Method 2: Using official build, the version updated. (Recommended)

Go to: https://go.dev/dl/, then install to default location eg. C:\Go

Update the PATH environment to let msys/ucrt64 know where golang installed.

$ echo 'export PATH=/c/Go/bin:$PATH' >> ~/.bashrc

Implicitly the installer will set windows environment variable for

set GOPATH environment: %USERPROFILE%\go
append PATH environment: C:\Go\bin;%USERPROFILE%\go\bin

On Msys/Ucrt64 also add this to allow msys execute go tools installed by go install:

$ echo "export PATH=$(cygpath $(go env GOPATH))/bin:\$PATH" >> ~/.bashrc

You may be need to remove msys/ucrt64 golang since you won’t using it, OR you can unset GOROOT since the msys/ucrt64 set this value in /ucrt64/etc/profile.d/go.sh, then:

$ echo 'unset GOROOT' >> ~/.bashrc

Update Git Executable Path

If you using Git for windows, then:

$ echo 'export PATH=/c/Program\ Files/Git/bin:$PATH' >> ~/.bashrc

Trying CGO using Msys/Ucrt64

For example we will try to compile project using CGO such as go-gl.

git clone https://github.com/gopxl/pixel-examples

git clone https://github.com/gopxl/pixel

Try execute go list --json and no DepsErrors field shown:

{
    "DepsErrors": [
        {
            "Err": "build constraints exclude all Go files in ..."
        }
    ]
}

Executing using Command Prompt

You need to set PATH environment before compiling:

> set PATH=%PATH%;C:\msys64\ucrt64\bin

GOPLS Settings CGO For VSCode

For Gopls language server know where the GCC compiler, update the settings.json:

   "gopls": {
        "build.env": {
            "PATH": "%PATH%;C:\\msys64\\ucrt64\\bin"
        }
    }

MSYS/UCRT64 Terminal FOR VSCode

"terminal.integrated.profiles.windows": {
        "ucrt64 (MSYS2)": {
            "path": "C:\\msys64\\msys2_shell.cmd",
            "args": [
                "-defterm", "-here", "-no-start", "-ucrt64"
            ]
        }
}

Linking to C Libraries

You need to compile those libraries using GCC, not using Visual Studio 2022.

Month: December 2023

Windows VSCode with Golang MSys/UCrt64