I can't recreate the problem. There are typos in your sample code; for example, you wrote pacage rather than package. In your error messages, there are also typos. Neither name is correct. The function is C.CString, not C.Cstirng or C.String. Can you show us the exact program that you are building, and the exact error messages you see? Cut and paste from your terminal, don't retype. Thanks.

I can't recreate the problem. There are typos in your sample code; for example, you wrote pacage rather than package. In your error messages, there are also typos. Neither name is correct. The function is C.CString, not C.Cstirng or C.String. Can you show us the exact program that you are building, and the exact error messages you see? Cut and paste from your terminal, don't retype. Thanks.

Hi Ian,

Apologies for typo.A small excerpt from the code.

package main

// #include "abc/abc-xyz.h"
import "C"
import (
	"fmt"
_ "fmt"
"unsafe"
)

func proc(envelope Envelope) {
	a := envelope.pgm
	b := envelope.msg
	if a == " " || b == " " {
	fmt.Println("Must provide a and b")
}
	a1 := C.CString(a)
	defer C.free(unsafe.Pointer(a1))
	b1 := C.CString(b)
	defer C.free(unsafe.Pointer(b1))
	C.match(a1, C.int(len(a1)), b1, C.int(len(b1)))

}
type Envelope struct {

pgm string
msg string

}

I am trying to load an external library.The header file points to the match function.When I run 'go build main.go' it shows the following issue:

could not determine kind of name for C.CStirng
could not determine kind of name for C.String

All the C dependencies reside in the abc folder.Do I need to zip the dependencies ?

$ go env
GOARCH="amd64"
GOBIN="/Users/nitish.saboo/Documents/goworkspace/bin"
GOCACHE="/Users/nitish.saboo/Library/Caches/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/nitish.saboo/Documents/goworkspace/"
GOPROXY=""
GORACE=""
GOROOT="/usr/local/go"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/3n/gnx8m6wx6zndptdxj3z3n61mfnyqn2/T/go-build470713600=/tmp/go-build -gno-record-gcc-switches -fno-common"

@nitishsaboo please attach (or link to) a complete source file that exhibits the problem, not just an excerpt. If there is a bug here, we need to be able to reproduce it in order to determine when we have fixed it.

If the error messages quoted above are exactly what you see, then the bug is that your code has typos for C.CString.

Thanks Ian.Issue resolved

how to fix it? pleae teach me

@xiaokai111 there was a typo that resolved the issue.