1 /* Configuration for an i386 running MS-DOS with DJGPP. 2 Copyright (C) 1997-2016 Free Software Foundation, Inc. 3 4 This file is part of GCC. 5 6 GCC is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3, or (at your option) 9 any later version. 10 11 GCC is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GCC; see the file COPYING3. If not see 18 <http://www.gnu.org/licenses/>. */ 19 20 /* Support generation of DWARF2 debugging info. */ 21 #define DWARF2_DEBUGGING_INFO 1 22 23 #undef PREFERRED_DEBUGGING_TYPE 24 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG 25 26 /* Don't assume anything about the header files. */ 27 #define NO_IMPLICIT_EXTERN_C 28 29 #undef BSS_SECTION_ASM_OP 30 #define BSS_SECTION_ASM_OP "\t.section\t.bss" 31 32 /* Define the name of the .data section. */ 33 #undef DATA_SECTION_ASM_OP 34 #define DATA_SECTION_ASM_OP "\t.section .data" 35 36 /* Define the name of the .ident op. */ 37 #undef TARGET_ASM_OUTPUT_IDENT 38 #define TARGET_ASM_OUTPUT_IDENT default_asm_output_ident_directive 39 40 /* Enable alias attribute support. */ 41 #ifndef SET_ASM_OP 42 #define SET_ASM_OP "\t.set\t" 43 #endif 44 45 /* Define the name of the .text section. */ 46 #undef TEXT_SECTION_ASM_OP 47 #define TEXT_SECTION_ASM_OP "\t.section .text" 48 49 #define TARGET_OS_CPP_BUILTINS() \ 50 do \ 51 { \ 52 if (!flag_iso) \ 53 builtin_define_with_int_value ("DJGPP",2); \ 54 builtin_define_with_int_value ("__DJGPP",2); \ 55 builtin_define_with_int_value ("__DJGPP__",2); \ 56 builtin_define_std ("MSDOS"); \ 57 builtin_define_std ("GO32"); \ 58 builtin_define_std ("unix"); \ 59 builtin_assert ("system=msdos"); \ 60 } \ 61 while (0) 62 63 #undef CPP_SPEC 64 #define CPP_SPEC "-remap %{posix:-D_POSIX_SOURCE}" 65 66 #undef POST_LINK_SPEC 67 #define POST_LINK_SPEC "stubify %{v} %{o*:%*} %{!o*:a.out}" 68 69 /* Always just link in 'libc.a'. */ 70 #undef LIB_SPEC 71 #define LIB_SPEC "-lc" 72 73 /* Pick the right startup code depending on the -pg flag. */ 74 #undef STARTFILE_SPEC 75 #define STARTFILE_SPEC "%{pg:gcrt0.o%s}%{!pg:crt0.o%s}" 76 77 /* Switch into a generic section. */ 78 #define TARGET_ASM_NAMED_SECTION i386_djgpp_asm_named_section 79 80 /* This is how to output an assembler line 81 that says to advance the location counter 82 to a multiple of 2**LOG bytes. */ 83 84 #undef ASM_OUTPUT_ALIGN 85 #define ASM_OUTPUT_ALIGN(FILE,LOG) \ 86 if ((LOG) != 0) fprintf ((FILE), "\t.p2align %d\n", LOG) 87 88 /* This is how to output a global symbol in the BSS section. */ 89 #undef ASM_OUTPUT_ALIGNED_BSS 90 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ 91 asm_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN)) 92 93 /* Write the extra assembler code needed to declare a function properly. */ 94 95 #ifndef ASM_DECLARE_FUNCTION_NAME 96 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \ 97 do \ 98 { \ 99 ASM_OUTPUT_FUNCTION_LABEL (FILE, NAME, DECL); \ 100 } \ 101 while (0) 102 #endif 103 104 /* This is how to tell assembler that a symbol is weak */ 105 #undef ASM_WEAKEN_LABEL 106 #define ASM_WEAKEN_LABEL(FILE,NAME) \ 107 do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \ 108 fputc ('\n', FILE); } while (0) 109 110 /* djgpp automatically calls its own version of __main, so don't define one 111 in libgcc, nor call one in main(). */ 112 #define HAS_INIT_SECTION 113 114 #undef TARGET_LIBC_HAS_FUNCTION 115 #define TARGET_LIBC_HAS_FUNCTION no_c99_libc_has_function 116 117 /* Definitions for types and sizes. Wide characters are 16-bits long so 118 Win32 compiler add-ons will be wide character compatible. */ 119 #undef WCHAR_TYPE_SIZE 120 #define WCHAR_TYPE_SIZE 16 121 122 #undef WCHAR_TYPE 123 #define WCHAR_TYPE "short unsigned int" 124 125 #undef WINT_TYPE 126 #define WINT_TYPE "int" 127 128 #undef SIZE_TYPE 129 #define SIZE_TYPE "long unsigned int" 130 131 #undef PTRDIFF_TYPE 132 #define PTRDIFF_TYPE "int" 133 134 #undef DBX_REGISTER_NUMBER 135 #define DBX_REGISTER_NUMBER(n) svr4_dbx_register_map[n] 136 137 /* Default to pcc-struct-return. */ 138 #define DEFAULT_PCC_STRUCT_RETURN 1 139 140 /* Ignore (with warning) -fPIC for DJGPP */ 141 #undef SUBTARGET_OVERRIDE_OPTIONS 142 #define SUBTARGET_OVERRIDE_OPTIONS \ 143 do { \ 144 if (flag_pic) \ 145 { \ 146 fnotice(stdout, "-f%s ignored (not supported for DJGPP)\n", \ 147 (flag_pic > 1) ? "PIC" : "pic"); \ 148 flag_pic = 0; \ 149 } \ 150 \ 151 /* Don't emit DWARF3/4 unless specifically selected. */ \ 152 /* DWARF3/4 currently does not work for DJGPP. */ \ 153 if (!global_options_set.x_dwarf_version) \ 154 dwarf_version = 2; \ 155 \ 156 } \ 157 while (0) 158 159 /* Support for C++ templates. */ 160 #undef MAKE_DECL_ONE_ONLY 161 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1) 162 163 /* Function protypes for gcc/i386/djgpp.c */ 164 165 void 166 i386_djgpp_asm_named_section(const char *name, unsigned int flags, 167 tree decl); 168