To fix the go:linkname must refer to declared function or variable error, you need to update the golang.org/x/sys package by this command: go get -u golang.org/x/sys.
The go:linkname must refer to declared function or variable error occurs in Golang when the name you provided in the directive does not conform to a declared function or variable in your program.
After upgrading to the Go 1.18 version, you might get //go:linkname must refer to declared function or variable error while running the go build command.
You need to make sure that the name you provide in the go:linkname directive corresponds to a valid function or variable that has been declared in your program or an external package.
Ensure that you spell the name correctly and that the function or variable has been properly declared and exported.
If you are trying to link to a function or variable in an external package, ensure the function or variable is exported. Exported names start with a capital letter in Go, so if the name of the function or variable you are trying to link to starts with a lowercase letter, it is not exported.
If you are trying to link to a function or variable in an external package, make sure that you are using the correct package name in the go:linkname directive.
Krunal Lathiya is a Software Engineer with over eight years of experience. He has developed a strong foundation in computer science principles and a passion for problem-solving. In addition, Krunal has excellent knowledge of Distributed and cloud computing and is an expert in Go Language.