1/* Definitions of target machine for GNU compiler.  "embedded" 68XXX.
2   This is meant to be included after m68k.h.
3   Copyright (C) 1994-2015 Free Software Foundation, Inc.  */
4
5/* Override the SVR4 ABI for this target.  */
6
7#define PTRDIFF_TYPE "long int"
8#define SIZE_TYPE "long unsigned int"
9
10/* In order for bitfields to work on a 68000, or with -mnobitfield, we must
11   define either PCC_BITFIELD_TYPE_MATTERS or STRUCTURE_SIZE_BOUNDARY.
12   Defining STRUCTURE_SIZE_BOUNDARY results in structure packing problems,
13   so we define PCC_BITFIELD_TYPE_MATTERS.  */
14#define PCC_BITFIELD_TYPE_MATTERS 1
15
16/* Don't default to pcc-struct-return, so that we can return small structures
17   and unions in registers, which is slightly more efficient.  */
18#define DEFAULT_PCC_STRUCT_RETURN 0
19
20#undef FUNCTION_VALUE
21#define FUNCTION_VALUE(VALTYPE,FUNC) LIBCALL_VALUE (TYPE_MODE (VALTYPE))
22
23#undef LIBCALL_VALUE
24#define LIBCALL_VALUE(MODE)					\
25  m68k_libcall_value (MODE)
26
27#undef FUNCTION_VALUE_REGNO_P
28#define FUNCTION_VALUE_REGNO_P(N)			\
29  ((N) == D0_REG || (TARGET_68881 && (N) == FP0_REG))
30
31#undef NEEDS_UNTYPED_CALL
32#define NEEDS_UNTYPED_CALL 1
33
34/* Target OS builtins.  */
35#define TARGET_OS_CPP_BUILTINS()		\
36  do						\
37    {						\
38      builtin_define ("__embedded__");		\
39    }						\
40  while (0)
41
42/* Override the default LIB_SPEC from gcc.c.  We don't currently support
43   profiling, or libg.a.  */
44
45#undef  LIB_SPEC
46#define LIB_SPEC "-lc"
47
48/* Make this be null, since we want the crt0.o to come from the linker
49   script */
50
51#undef  STARTFILE_SPEC
52#define STARTFILE_SPEC ""
53