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cmd/cgo: could not determine kind of name for C.datspecialnumber #9733

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ghost opened this issue Jan 29, 2015 · 7 comments
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cmd/cgo: could not determine kind of name for C.datspecialnumber #9733

ghost opened this issue Jan 29, 2015 · 7 comments
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@ghost
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ghost commented Jan 29, 2015

Code in Go file:

package main

/*
#include <stdio.h>
int datspecialnumber() {
    return 2015;
}
*/

import "C"
import "fmt"

func main() {
    fmt.Println(C.datspecialnumber())
}

Output from go run test.go:

# command-line-arguments
could not determine kind of name for C.datspecialnumber

More info

go version go1.4 linux/amd64

gcc (GCC) 4.9.2 20141224 (prerelease)
Copyright (C) 2014 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

GOARCH="amd64"
GOBIN=""
GOCHAR="6"
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/president/go"
GORACE=""
GOROOT="/usr/lib/go"
GOTOOLDIR="/usr/lib/go/pkg/tool/linux_amd64"
CC="gcc"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0"
CXX="g++"
CGO_ENABLED="1"

Anyone have an idea of what is causing this error? Am i doing something wrong?
@alicebob
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Remove the blank line above the import "C" line.

@davecheney
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As @alicebob said, there should be no newline between the /* ... */ cgo block and import "C"

http://golang.org/cmd/cgo/

@ghost
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ghost commented Jan 30, 2015

Oops, my bad. Thanks for clearing that up, guys.

@mikioh mikioh changed the title could not determine kind of name for C.datspecialnumber cmd/cgo: could not determine kind of name for C.datspecialnumber Jan 30, 2015
@leomq
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leomq commented Aug 24, 2015

Wow! I met the same problem.

@ezwiebel
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ezwiebel commented Aug 1, 2016

The f**k! Thanks guys, was stuck for hours, it was driving me mad...
I love conventions but sometimes it's kind of harsh!

@stgleb
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stgleb commented Aug 31, 2016 •
edited
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I just want to add that multiline imports like

import (
               "C"
                "fmt"
)

Also breaks this stuff

@xgz123
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xgz123 commented May 18, 2017 •
edited
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Yeah the space might be the problem. But I still get this error when I'm trying to declare a c struct in cgo with no space between comments and import "C"

type record C.some_struct

// could not determine kind of name for C.some_struct

this time it really can not determine

@ChengOrangeJu ChengOrangeJu mentioned this issue May 17, 2018
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@golang golang locked and limited conversation to collaborators May 18, 2018
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@davecheney @alicebob @ezwiebel @stgleb @gopherbot @leomq @xgz123