clang-tests/gcc-4_2-testsuite/src/g++.dg/opt/interface1.C

// { dg-do run }
// { dg-options "-O2" }
// { dg-additional-sources "interface1-a.cc" }

#pragma implementation "interface1.h"

#include "interface1.h"

extern void g();

int main (int argv, char *argc[]) {
  g();
}