modernc.org/cc@v1.0.1/testdata/gcc-6.3.0/gcc/testsuite/gcc.c-torture/execute/complex-4.c (about)

     1  main ()
     2  {
     3    if ((__complex__ double) 0.0 != (__complex__ double) (-0.0))
     4      abort ();
     5  
     6    if (0.0 != -0.0)
     7      abort ();
     8    exit (0);
     9  }