gcc-4.9/gcc/testsuite/gcc.target/i386/pr64409.c

/* { dg-do compile { target { ! { ia32 } } } } */
/* { dg-require-effective-target maybe_x32 } */
/* { dg-options "-O0 -mx32" } */

int a;
int* __attribute__ ((ms_abi)) fn1 () { return &a; } /* { dg-error "X32 does not support ms_abi attribute" } */