I’ve created a package logging with the following contents:

package logging

/*
#cgo LDFLAGS: -L. -L../lib -lcfastlogging
#include "../lib/gofastlogging.h"
*/
import "C"

const DEBUG = 10

type Logging struct {
    logging C.Logging
}

func Init() Logging {
    logging := C.logging_init()
    instance := Logging{logging}
    return instance
}

func (instance Logging) debug(message string) {
    C.logging_debug(instance.logging, C.CString(message))
}

In the main package I’m using it as follows:

package main

import "examples/logging"

func main() {
    logger := logging.Init()
    logger.debug("Debug message")
}

go.mod has following contents:

module examples

go 1.22.3

The file structure is:

examples/example/main.go
logging/logging.go
lib/gofastlogging.h
go.mod

The problem now is that go prints the following error when I want to execute main.go:

examples/example/main.go:8:9: logger.debug undefined (type logging.Logging has no field or method debug)

Why is the method debug not a method of the struct Logging? I’ve done it exactly how it is described in the tutorials.