gcc/testsuite/gcc.dg/pragma-diag-5.c

/* { dg-do compile } */
#pragma GCC diagnostic /* { dg-warning "missing" "missing" } */
/* { dg-warning "24:missing" "wrong column" { xfail *-*-* }  .-1 } */

#pragma GCC diagnostic warn /* { dg-warning "24:expected" } */

#pragma GCC diagnostic ignored "-Wfoo" /* { dg-warning "32:unknown" } */