1 /* Configuration for an i386 running MS-DOS with DJGPP. 2 Copyright (C) 1997-2013 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 /* Don't assume anything about the header files. */ 24 #define NO_IMPLICIT_EXTERN_C 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 /* Enable alias attribute support. */ 34 #ifndef SET_ASM_OP 35 #define SET_ASM_OP "\t.set\t" 36 #endif 37 38 /* Define the name of the .text section. */ 39 #undef TEXT_SECTION_ASM_OP 40 #define TEXT_SECTION_ASM_OP "\t.section .text" 41 42 /* Define standard DJGPP installation paths. */ 43 /* We override default /usr or /usr/local part with /dev/env/DJDIR which */ 44 /* points to actual DJGPP installation directory. */ 45 46 /* Search for as.exe and ld.exe in DJGPP's binary directory. */ 47 #undef MD_EXEC_PREFIX 48 #define MD_EXEC_PREFIX "/dev/env/DJDIR/bin/" 49 50 /* Standard DJGPP library and startup files */ 51 #undef MD_STARTFILE_PREFIX 52 #define MD_STARTFILE_PREFIX "/dev/env/DJDIR/lib/" 53 54 /* Correctly handle absolute filename detection in cp/xref.c */ 55 #define FILE_NAME_ABSOLUTE_P(NAME) \ 56 (((NAME)[0] == '/') || ((NAME)[0] == '\\') || \ 57 (((NAME)[0] >= 'A') && ((NAME)[0] <= 'z') && ((NAME)[1] == ':'))) 58 59 #define TARGET_OS_CPP_BUILTINS() \ 60 do \ 61 { \ 62 builtin_define_std ("MSDOS"); \ 63 builtin_define_std ("GO32"); \ 64 builtin_assert ("system=msdos"); \ 65 } \ 66 while (0) 67 68 /* Include <sys/version.h> so __DJGPP__ and __DJGPP_MINOR__ are defined. */ 69 #undef CPP_SPEC 70 #define CPP_SPEC "-remap %{posix:-D_POSIX_SOURCE} \ 71 -imacros %s../include/sys/version.h" 72 73 /* We need to override link_command_spec in gcc.c so support -Tdjgpp.djl. 74 This cannot be done in LINK_SPECS as that LINK_SPECS is processed 75 before library search directories are known by the linker. 76 This avoids problems when specs file is not available. An alternate way, 77 suggested by Robert Hoehne, is to use SUBTARGET_EXTRA_SPECS instead. 78 */ 79 80 #undef LINK_COMMAND_SPEC 81 #define LINK_COMMAND_SPEC \ 82 "%{!fsyntax-only: \ 83 %{!c:%{!M:%{!MM:%{!E:%{!S:%(linker) %l %X %{o*} %{e*} %{N} %{n} \ 84 \t%{r} %{s} %{t} %{u*} %{z} %{Z}\ 85 \t%{!nostdlib:%{!nostartfiles:%S}}\ 86 \t%{static:} %{L*} %D %o\ 87 \t%{!nostdlib:%{!nodefaultlibs:%G %L %G}}\ 88 \t%{!nostdlib:%{!nostartfiles:%E}}\ 89 \t-Tdjgpp.djl %{T*}}}}}}}\n\ 90 %{!c:%{!M:%{!MM:%{!E:%{!S:stubify %{v} %{o*:%*} %{!o*:a.out} }}}}}" 91 92 /* Always just link in 'libc.a'. */ 93 #undef LIB_SPEC 94 #define LIB_SPEC "-lc" 95 96 /* Pick the right startup code depending on the -pg flag. */ 97 #undef STARTFILE_SPEC 98 #define STARTFILE_SPEC "%{pg:gcrt0.o%s}%{!pg:crt0.o%s}" 99 100 /* Make sure that gcc will not look for .h files in /usr/local/include 101 unless user explicitly requests it. */ 102 #undef LOCAL_INCLUDE_DIR 103 104 /* Switch into a generic section. */ 105 #define TARGET_ASM_NAMED_SECTION default_coff_asm_named_section 106 107 /* This is how to output an assembler line 108 that says to advance the location counter 109 to a multiple of 2**LOG bytes. */ 110 111 #undef ASM_OUTPUT_ALIGN 112 #define ASM_OUTPUT_ALIGN(FILE,LOG) \ 113 if ((LOG) != 0) fprintf ((FILE), "\t.p2align %d\n", LOG) 114 115 /* This is how to output a global symbol in the BSS section. */ 116 #undef ASM_OUTPUT_ALIGNED_BSS 117 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ 118 asm_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN)) 119 120 /* This is how to tell assembler that a symbol is weak */ 121 #undef ASM_WEAKEN_LABEL 122 #define ASM_WEAKEN_LABEL(FILE,NAME) \ 123 do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \ 124 fputc ('\n', FILE); } while (0) 125 126 /* djgpp automatically calls its own version of __main, so don't define one 127 in libgcc, nor call one in main(). */ 128 #define HAS_INIT_SECTION 129 130 /* Definitions for types and sizes. Wide characters are 16-bits long so 131 Win32 compiler add-ons will be wide character compatible. */ 132 #undef WCHAR_TYPE_SIZE 133 #define WCHAR_TYPE_SIZE 16 134 135 #undef WCHAR_TYPE 136 #define WCHAR_TYPE "short unsigned int" 137 138 #undef WINT_TYPE 139 #define WINT_TYPE "int" 140 141 #undef SIZE_TYPE 142 #define SIZE_TYPE "long unsigned int" 143 144 #undef PTRDIFF_TYPE 145 #define PTRDIFF_TYPE "int" 146 147 /* Used to be defined in xm-djgpp.h, but moved here for cross-compilers. */ 148 #define LIBSTDCXX "stdcxx" 149 150 /* Warn that -mbnu210 is now obsolete. */ 151 #undef SUBTARGET_OVERRIDE_OPTIONS 152 #define SUBTARGET_OVERRIDE_OPTIONS \ 153 do \ 154 { \ 155 if (TARGET_BNU210) \ 156 { \ 157 warning (0, "-mbnu210 is ignored (option is obsolete)"); \ 158 } \ 159 } \ 160 while (0) 161 162 /* Support for C++ templates. */ 163 #undef MAKE_DECL_ONE_ONLY 164 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1) 165