1 /* Configuration for an i386 running MS-DOS with DJGPP. 2 Copyright (C) 1997-2022 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 #undef BSS_SECTION_ASM_OP 27 #define BSS_SECTION_ASM_OP "\t.section\t.bss" 28 29 /* Define the name of the .data section. */ 30 #undef DATA_SECTION_ASM_OP 31 #define DATA_SECTION_ASM_OP "\t.section .data" 32 33 /* Define the name of the .ident op. */ 34 #undef TARGET_ASM_OUTPUT_IDENT 35 #define TARGET_ASM_OUTPUT_IDENT default_asm_output_ident_directive 36 37 /* Enable alias attribute support. */ 38 #ifndef SET_ASM_OP 39 #define SET_ASM_OP "\t.set\t" 40 #endif 41 42 /* Define the name of the .text section. */ 43 #undef TEXT_SECTION_ASM_OP 44 #define TEXT_SECTION_ASM_OP "\t.section .text" 45 46 #define TARGET_OS_CPP_BUILTINS() \ 47 do \ 48 { \ 49 if (!flag_iso) \ 50 builtin_define_with_int_value ("DJGPP",2); \ 51 builtin_define_with_int_value ("__DJGPP",2); \ 52 builtin_define_with_int_value ("__DJGPP__",2); \ 53 builtin_define_std ("MSDOS"); \ 54 builtin_define_std ("GO32"); \ 55 builtin_define_std ("unix"); \ 56 builtin_assert ("system=msdos"); \ 57 } \ 58 while (0) 59 60 #undef CPP_SPEC 61 #define CPP_SPEC "-remap %{posix:-D_POSIX_SOURCE}" 62 63 #undef POST_LINK_SPEC 64 #define POST_LINK_SPEC "stubify %{v} %{o*:%*} %{!o*:a.out}" 65 66 /* Always just link in 'libc.a'. */ 67 #undef LIB_SPEC 68 #define LIB_SPEC "-lc" 69 70 /* Pick the right startup code depending on the -pg flag. */ 71 #undef STARTFILE_SPEC 72 #define STARTFILE_SPEC "%{pg:gcrt0.o%s}%{!pg:crt0.o%s}" 73 74 /* Switch into a generic section. */ 75 #define TARGET_ASM_NAMED_SECTION i386_djgpp_asm_named_section 76 77 /* This is how to output an assembler line 78 that says to advance the location counter 79 to a multiple of 2**LOG bytes. */ 80 81 #undef ASM_OUTPUT_ALIGN 82 #define ASM_OUTPUT_ALIGN(FILE,LOG) \ 83 if ((LOG) != 0) fprintf ((FILE), "\t.p2align %d\n", LOG) 84 85 /* This is how to output a global symbol in the BSS section. */ 86 #undef ASM_OUTPUT_ALIGNED_BSS 87 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ 88 asm_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN)) 89 90 /* Write the extra assembler code needed to declare a function properly. */ 91 92 #ifndef ASM_DECLARE_FUNCTION_NAME 93 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \ 94 do \ 95 { \ 96 ASM_OUTPUT_FUNCTION_LABEL (FILE, NAME, DECL); \ 97 } \ 98 while (0) 99 #endif 100 101 /* This is how to tell assembler that a symbol is weak */ 102 #undef ASM_WEAKEN_LABEL 103 #define ASM_WEAKEN_LABEL(FILE,NAME) \ 104 do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \ 105 fputc ('\n', FILE); } while (0) 106 107 /* djgpp automatically calls its own version of __main, so don't define one 108 in libgcc, nor call one in main(). */ 109 #define HAS_INIT_SECTION 110 111 #undef TARGET_LIBC_HAS_FUNCTION 112 #define TARGET_LIBC_HAS_FUNCTION no_c99_libc_has_function 113 114 /* Definitions for types and sizes. Wide characters are 16-bits long so 115 Win32 compiler add-ons will be wide character compatible. */ 116 #undef WCHAR_TYPE_SIZE 117 #define WCHAR_TYPE_SIZE 16 118 119 #undef WCHAR_TYPE 120 #define WCHAR_TYPE "short unsigned int" 121 122 #undef WINT_TYPE 123 #define WINT_TYPE "int" 124 125 #undef SIZE_TYPE 126 #define SIZE_TYPE "long unsigned int" 127 128 #undef PTRDIFF_TYPE 129 #define PTRDIFF_TYPE "int" 130 131 #undef DBX_REGISTER_NUMBER 132 #define DBX_REGISTER_NUMBER(n) svr4_dbx_register_map[n] 133 134 /* Default to pcc-struct-return. */ 135 #define DEFAULT_PCC_STRUCT_RETURN 1 136 137 /* Ignore (with warning) -fPIC for DJGPP */ 138 #undef SUBTARGET_OVERRIDE_OPTIONS 139 #define SUBTARGET_OVERRIDE_OPTIONS \ 140 do { \ 141 if (flag_pic) \ 142 { \ 143 fnotice(stdout, "-f%s ignored (not supported for DJGPP)\n", \ 144 (flag_pic > 1) ? "PIC" : "pic"); \ 145 flag_pic = 0; \ 146 } \ 147 \ 148 /* Don't emit DWARF3/4 unless specifically selected. */ \ 149 /* DWARF3/4 currently does not work for DJGPP. */ \ 150 if (!OPTION_SET_P (dwarf_version)) \ 151 dwarf_version = 2; \ 152 \ 153 } \ 154 while (0) 155 156 /* Support for C++ templates. */ 157 #undef MAKE_DECL_ONE_ONLY 158 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1) 159 160 #undef TARGET_COFF 161 #define TARGET_COFF 1 162 163 /* Kludge because of missing COFF support for early LTO debug. */ 164 #undef TARGET_ASM_LTO_START 165 #define TARGET_ASM_LTO_START i386_djgpp_asm_lto_start 166 #undef TARGET_ASM_LTO_END 167 #define TARGET_ASM_LTO_END i386_djgpp_asm_lto_end 168 169 /* Function protypes for gcc/i386/djgpp.cc */ 170 171 void 172 i386_djgpp_asm_named_section(const char *name, unsigned int flags, 173 tree decl); 174 void i386_djgpp_asm_lto_start (void); 175 void i386_djgpp_asm_lto_end (void); 176
Indexes created Sat Feb 28 05:31:39 UTC 2026