gccgo-cross-compile can't compile cgo

Question

I am trying to compile a simple go program using gccgo. My code uses cgo thou, gccgo couldn't compile it. This is my code (which compiles using go compiler):

package main

// #include <stdio.h>
// #include <stdlib.h>
//
// static void myprint(char* s) {
//   printf("%s\n", s);
// }
import "C"
import "fmt"
func main(){
    fmt.Println("Start")
    cs := C.CString("Print from C")
    C.myprint(cs)
    fmt.Println("End")
}

when I compile the code using gccgo main.go -o gccoutput I get:

main.go:9:9: error: import file ‘C’ not found
 import "C"
         ^
main.go:13:8: error: reference to undefined name ‘C’
  cs := C.CString("Print from C")
        ^
main.go:14:2: error: reference to undefined name ‘C’
  C.myprint(cs)
  ^

any ideas how to solve this?

EDIT: I am trying to compile to ppc using the gccgo, and I don't want to use cross-compilation process of go compiler. I have tried to do (as suggested in the comments):

go build -compiler=gccgo

and it worked. Thou, when I do:

go build -comiler=powerpc-linux-gnu-gccgo main.go

I get:

invalid value "powerpc-linux-gnu-gccgo" for flag -compiler: unknown compiler "powerpc-linux-gnu-gccgo"
usage: go build [-o output] [-i] [build flags] [packages]
Run 'go help build' for details.