gcc/testsuite/gcc.dg/cpp/sysmac2.c

/* Copyright (C) 2001 Free Software Foundation, Inc.  */

/* { dg-do compile } */
/* { dg-options "-std=gnu99 -pedantic -Wtraditional" } */

/* Tests diagnostics are suppressed for some macros defined in system
   headers.  */

/* Source: Neil Booth, 15 Jan 2001.  */

#define uint 1U
#define fl 1.0f
#define ld 1.0L

# 16 "system.h" 1 3 		/* { dg-warning "followed by integer" }  */

#define sys_uint 1U
#define sys_fl 1.0f
#define sys_ld 1.0L

# 22 "bar.c" 2			/* { dg-warning "expected to return" }  */

int
main ()
{
  int u1 = uint;		/* { dg-warning "traditional C rejects" } */
  int u2 = sys_uint;		/* { dg-bogus "traditional C rejects" } */
  float f1 = fl;		/* { dg-warning "traditional C rejects" } */
  float f2 = sys_fl;		/* { dg-bogus "traditional C rejects" } */
  long double ld1 = ld;		/* { dg-warning "traditional C rejects" } */
  long double l2 = sys_ld;	/* { dg-bogus "traditional C rejects" } */

  return 0;
}