Why Does My Go Project Show 'Build Constraints Exclude All Go Files' When Importing 'golang.org/x/net/route'?

Resolving "Build Constraints Exclude All Go Files" Error for "golang.org/x/net/route" Import

When utilizing the "golang.org/x/net/route" package, you may encounter an error stating, "build constraints exclude all Go files in go/src/golang.org/x/net/routego." Here's a solution to resolve this issue:

1. Execute "go clean -modcache" Command:

   Open your terminal or command prompt and type the following command:

   go clean -modcache

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   This command removes the Go module cache, which may resolve the issue.

2. Rebuild the Project:

   After executing the "go clean -modcache" command, rebuild your project by running the following command:

   go build

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Additional Troubleshooting Tips:

• Ensure that your Go version is up to date.
• Validate that you have the correct import path for the "golang.org/x/net/route" package.
• Check your build constraints (if any) to ensure they are not excluding the necessary Go files.

• In rare cases, manually adding the following line to your code can resolve the issue:

  // +build windows linux darwin

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