@@ -5,8 +5,8 @@ package nsenter
 /*
 #cgo CFLAGS: -Wall
 extern void nsexec();
-void __attribute__((constructor)) init(void) {
-	nsexec();
+void __attribute__((constructor)) init(int argc, char *argv[]) {
+	nsexec(argv);
 }
 */
 import "C"
// +build linux,gccgo

package nsenter

/*
#cgo CFLAGS: -Wall
extern void nsexec();
void __attribute__((constructor)) init(void) {
	nsexec();
}
*/
import "C"

// AlwaysFalse is here to stay false
// (and be exported so the compiler doesn't optimize out its reference)
var AlwaysFalse bool

func init() {
	if AlwaysFalse {
		// by referencing this C init() in a noop test, it will ensure the compiler
		// links in the C function.
		// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65134
		C.init()
	}
}

You forgot to pass `argc` here.