gcc/testsuite/gcc.dg/signbit-sa.c

   1 /* Some versions of Solaris <math.h> give strict-aliasing warnings for
   2    signbit.  */
   3 /* { dg-require-effective-target c99_runtime } */
   4 /* { dg-options "-std=c99 -O2 -Wstrict-aliasing" } */
   5
   6 #include <math.h>
   7
   8 int
   9 main (void)
  10 {
  11   return signbit (1.0f) | signbit (1.0) | signbit (1.0l);;
  12 }