llvm-gcc-4.2/gcc/testsuite/gcc.target/i386/amd64-abi-2.c

/* PR target/26223 */
/* { dg-do compile { target { { i?86-*-* x86_64-*-* } && lp64 } } } */
/* { dg-options "-mno-80387" } */
long double foo(long double x) { return x; } /* { dg-error "x87 disabled" } */
long double bar(long double x) { return x; }