gcc/testsuite/g++.dg/compat/abi/bitfield2.h

   1 typedef int Int;
   2 typedef signed int SInt;
   3 typedef unsigned int UInt;
   4
   5 struct A
   6 {
   7   SInt bitS : 1;        // signed
   8   UInt bitU : 1;        // unsigned
   9   Int bit : 1;          // signedness by -f{signed,unsigned}-bitfields
  10 };