1 /* { dg-do compile } */ 2 /* { dg-options "-Wunused-variable" } */ 3 4 static int a = 0; /* { dg-warning "defined but not used" } */ 5 static const int b = 0; /* Unlike C, this doesn't cause a warning in C++. */ 6 static int c __attribute__ ((unused)) = 0; 7 static const char rcsid[] = "version-string"; /* Likewise. */ 8