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