| /* Definitions of target machine for GNU compiler. "embedded" 68XXX. |
| This is meant to be included after m68k.h. |
| Copyright (C) 1994-2022 Free Software Foundation, Inc. */ |
| |
| /* Override the SVR4 ABI for this target. */ |
| |
| #define PTRDIFF_TYPE "long int" |
| #define SIZE_TYPE "long unsigned int" |
| |
| /* In order for bitfields to work on a 68000, or with -mnobitfield, we must |
| define either PCC_BITFIELD_TYPE_MATTERS or STRUCTURE_SIZE_BOUNDARY. |
| Defining STRUCTURE_SIZE_BOUNDARY results in structure packing problems, |
| so we define PCC_BITFIELD_TYPE_MATTERS. */ |
| #define PCC_BITFIELD_TYPE_MATTERS 1 |
| |
| /* Don't default to pcc-struct-return, so that we can return small structures |
| and unions in registers, which is slightly more efficient. */ |
| #define DEFAULT_PCC_STRUCT_RETURN 0 |
| |
| #undef FUNCTION_VALUE |
| #define FUNCTION_VALUE(VALTYPE,FUNC) LIBCALL_VALUE (TYPE_MODE (VALTYPE)) |
| |
| #undef LIBCALL_VALUE |
| #define LIBCALL_VALUE(MODE) \ |
| m68k_libcall_value (MODE) |
| |
| #undef FUNCTION_VALUE_REGNO_P |
| #define FUNCTION_VALUE_REGNO_P(N) \ |
| ((N) == D0_REG || (TARGET_68881 && (N) == FP0_REG)) |
| |
| #undef NEEDS_UNTYPED_CALL |
| #define NEEDS_UNTYPED_CALL 1 |
| |
| /* Target OS builtins. */ |
| #define TARGET_OS_CPP_BUILTINS() \ |
| do \ |
| { \ |
| builtin_define ("__embedded__"); \ |
| } \ |
| while (0) |
| |
| /* Override the default LIB_SPEC from gcc.cc. We don't currently support |
| profiling, or libg.a. */ |
| |
| #undef LIB_SPEC |
| #define LIB_SPEC "-lc" |
| |
| /* Make this be null, since we want the crt0.o to come from the linker |
| script */ |
| |
| #undef STARTFILE_SPEC |
| #define STARTFILE_SPEC "" |