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1 /* Configuration for an i386 running MS-DOS with DJGPP.
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2 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2004, 2005,
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3 2007 Free Software Foundation, Inc.
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4
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5 This file is part of GCC.
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6
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7 GCC is free software; you can redistribute it and/or modify
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8 it under the terms of the GNU General Public License as published by
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9 the Free Software Foundation; either version 3, or (at your option)
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10 any later version.
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11
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12 GCC is distributed in the hope that it will be useful,
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13 but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with GCC; see the file COPYING3. If not see
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19 <http://www.gnu.org/licenses/>. */
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20
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21 /* Support generation of DWARF2 debugging info. */
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22 #define DWARF2_DEBUGGING_INFO 1
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23
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24 /* Don't assume anything about the header files. */
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25 #define NO_IMPLICIT_EXTERN_C
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26
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27 #define HANDLE_SYSV_PRAGMA 1
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28
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29 /* Enable parsing of #pragma pack(push,<n>) and #pragma pack(pop). */
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30 #define HANDLE_PRAGMA_PACK_PUSH_POP 1
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31
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32 /* If defined, a C expression whose value is a string containing the
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33 assembler operation to identify the following data as
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34 uninitialized global data. If not defined, and neither
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35 `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined,
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36 uninitialized global data will be output in the data section if
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37 `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be
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38 used. */
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39 #undef BSS_SECTION_ASM_OP
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40 #define BSS_SECTION_ASM_OP "\t.section\t.bss"
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41
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42 /* Define the name of the .data section. */
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43 #undef DATA_SECTION_ASM_OP
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44 #define DATA_SECTION_ASM_OP "\t.section .data"
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45
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46 /* Define the name of the .ident op. */
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47 #undef IDENT_ASM_OP
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48 #define IDENT_ASM_OP "\t.ident\t"
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49
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50 /* Enable alias attribute support. */
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51 #ifndef SET_ASM_OP
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52 #define SET_ASM_OP "\t.set\t"
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53 #endif
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54
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55 /* Define the name of the .text section. */
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56 #undef TEXT_SECTION_ASM_OP
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57 #define TEXT_SECTION_ASM_OP "\t.section .text"
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58
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59 /* Define standard DJGPP installation paths. */
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60 /* We override default /usr or /usr/local part with /dev/env/DJDIR which */
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61 /* points to actual DJGPP installation directory. */
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62
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63 /* Standard include directory */
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64 #undef STANDARD_INCLUDE_DIR
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65 #define STANDARD_INCLUDE_DIR "/dev/env/DJDIR/include/"
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66
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67 /* Search for as.exe and ld.exe in DJGPP's binary directory. */
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68 #undef MD_EXEC_PREFIX
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69 #define MD_EXEC_PREFIX "/dev/env/DJDIR/bin/"
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70
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71 /* Standard DJGPP library and startup files */
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72 #undef MD_STARTFILE_PREFIX
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73 #define MD_STARTFILE_PREFIX "/dev/env/DJDIR/lib/"
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74
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75 /* Correctly handle absolute filename detection in cp/xref.c */
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76 #define FILE_NAME_ABSOLUTE_P(NAME) \
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77 (((NAME)[0] == '/') || ((NAME)[0] == '\\') || \
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78 (((NAME)[0] >= 'A') && ((NAME)[0] <= 'z') && ((NAME)[1] == ':')))
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79
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80 #define TARGET_OS_CPP_BUILTINS() \
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81 do \
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82 { \
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83 builtin_define_std ("MSDOS"); \
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84 builtin_define_std ("GO32"); \
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85 builtin_assert ("system=msdos"); \
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86 } \
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87 while (0)
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88
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89 /* Include <sys/version.h> so __DJGPP__ and __DJGPP_MINOR__ are defined. */
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90 #undef CPP_SPEC
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91 #define CPP_SPEC "-remap %{posix:-D_POSIX_SOURCE} \
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92 -imacros %s../include/sys/version.h"
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93
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94 /* We need to override link_command_spec in gcc.c so support -Tdjgpp.djl.
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95 This cannot be done in LINK_SPECS as that LINK_SPECS is processed
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96 before library search directories are known by the linker.
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97 This avoids problems when specs file is not available. An alternate way,
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98 suggested by Robert Hoehne, is to use SUBTARGET_EXTRA_SPECS instead.
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99 */
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100
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101 #undef LINK_COMMAND_SPEC
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102 #define LINK_COMMAND_SPEC \
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103 "%{!fsyntax-only: \
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104 %{!c:%{!M:%{!MM:%{!E:%{!S:%(linker) %l %X %{o*} %{A} %{d} %{e*} %{m} %{N} %{n} \
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105 \t%{r} %{s} %{t} %{u*} %{x} %{z} %{Z}\
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106 \t%{!A:%{!nostdlib:%{!nostartfiles:%S}}}\
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107 \t%{static:} %{L*} %D %o\
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108 \t%{!nostdlib:%{!nodefaultlibs:%G %L %G}}\
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109 \t%{!A:%{!nostdlib:%{!nostartfiles:%E}}}\
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110 \t-Tdjgpp.djl %{T*}}}}}}}\n\
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111 %{!c:%{!M:%{!MM:%{!E:%{!S:stubify %{v} %{o*:%*} %{!o*:a.out} }}}}}"
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112
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113 /* Always just link in 'libc.a'. */
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114 #undef LIB_SPEC
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115 #define LIB_SPEC "-lc"
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116
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117 /* Pick the right startup code depending on the -pg flag. */
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118 #undef STARTFILE_SPEC
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119 #define STARTFILE_SPEC "%{pg:gcrt0.o%s}%{!pg:crt0.o%s}"
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120
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121 /* Make sure that gcc will not look for .h files in /usr/local/include
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122 unless user explicitly requests it. */
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123 #undef LOCAL_INCLUDE_DIR
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124
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125 /* Switch into a generic section. */
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126 #define TARGET_ASM_NAMED_SECTION default_coff_asm_named_section
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127
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128 /* This is how to output an assembler line
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129 that says to advance the location counter
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130 to a multiple of 2**LOG bytes. */
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131
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132 #undef ASM_OUTPUT_ALIGN
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133 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
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134 if ((LOG) != 0) fprintf ((FILE), "\t.p2align %d\n", LOG)
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135
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136 /* This is how to output a global symbol in the BSS section. */
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137 #undef ASM_OUTPUT_ALIGNED_BSS
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138 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
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139 asm_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
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140
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141 /* This is how to tell assembler that a symbol is weak */
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142 #undef ASM_WEAKEN_LABEL
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143 #define ASM_WEAKEN_LABEL(FILE,NAME) \
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144 do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \
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145 fputc ('\n', FILE); } while (0)
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146
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147 /* djgpp automatically calls its own version of __main, so don't define one
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148 in libgcc, nor call one in main(). */
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149 #define HAS_INIT_SECTION
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150
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151 /* Definitions for types and sizes. Wide characters are 16-bits long so
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152 Win32 compiler add-ons will be wide character compatible. */
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153 #undef WCHAR_TYPE_SIZE
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154 #define WCHAR_TYPE_SIZE 16
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155
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156 #undef WCHAR_TYPE
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157 #define WCHAR_TYPE "short unsigned int"
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158
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159 #undef WINT_TYPE
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160 #define WINT_TYPE "int"
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161
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162 #undef SIZE_TYPE
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163 #define SIZE_TYPE "long unsigned int"
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164
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165 #undef PTRDIFF_TYPE
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166 #define PTRDIFF_TYPE "int"
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167
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168 /* Used to be defined in xm-djgpp.h, but moved here for cross-compilers. */
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169 #define LIBSTDCXX "-lstdcxx"
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170
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171 #define TARGET_VERSION fprintf (stderr, " (80386, MS-DOS DJGPP)");
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172
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173 /* Warn that -mbnu210 is now obsolete. */
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174 #undef SUBTARGET_OVERRIDE_OPTIONS
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175 #define SUBTARGET_OVERRIDE_OPTIONS \
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176 do \
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177 { \
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178 if (TARGET_BNU210) \
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179 { \
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180 warning (0, "-mbnu210 is ignored (option is obsolete)"); \
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181 } \
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182 } \
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183 while (0)
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184
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185 /* Support for C++ templates. */
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186 #undef MAKE_DECL_ONE_ONLY
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187 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
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