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1 /****************************************************************************
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2 * *
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3 * GNAT COMPILER COMPONENTS *
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4 * *
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5 * L I N K *
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6 * *
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7 * C Implementation File *
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8 * *
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131
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9 * Copyright (C) 1992-2018, Free Software Foundation, Inc. *
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111
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10 * *
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11 * GNAT is free software; you can redistribute it and/or modify it under *
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12 * terms of the GNU General Public License as published by the Free Soft- *
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13 * ware Foundation; either version 3, or (at your option) any later ver- *
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14 * sion. GNAT is distributed in the hope that it will be useful, but WITH- *
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15 * OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY *
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16 * or FITNESS FOR A PARTICULAR PURPOSE. *
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17 * *
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18 * As a special exception under Section 7 of GPL version 3, you are granted *
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19 * additional permissions described in the GCC Runtime Library Exception, *
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20 * version 3.1, as published by the Free Software Foundation. *
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21 * *
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22 * You should have received a copy of the GNU General Public License and *
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23 * a copy of the GCC Runtime Library Exception along with this program; *
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24 * see the files COPYING3 and COPYING.RUNTIME respectively. If not, see *
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25 * <http://www.gnu.org/licenses/>. *
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26 * *
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27 * GNAT was originally developed by the GNAT team at New York University. *
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28 * Extensive contributions were provided by Ada Core Technologies Inc. *
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29 * *
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30 ****************************************************************************/
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31
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32 /* This file contains host-specific parameters describing the behavior of the
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33 linker. It is used by gnatlink as well as all tools that use Mlib. */
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34
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35 #ifdef __cplusplus
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36 extern "C" {
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37 #endif
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38
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39 #ifdef IN_GCC
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40 #include "auto-host.h"
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41 #endif
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42
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43 #include <string.h>
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44
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45 /* objlist_file_supported is set to 1 when the system linker allows */
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46 /* response file, that is a file that contains the list of object files. */
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47 /* This is useful on systems where the command line length is limited, */
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48 /* meaning that putting all the object files on the command line can */
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49 /* result in an unacceptable limit on the number of files. */
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50
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51 /* object_file_option denotes the system dependent linker option which */
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52 /* allows object file names to be placed in a file and then passed to */
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53 /* the linker. object_file_option must be set if objlist_file_supported */
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54 /* is set to 1. */
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55
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56 /* link_max is a conservative system specific threshold (in bytes) of the */
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57 /* argument length passed to the linker which will trigger a file being */
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58 /* used instead of the command line directly. If the argument length is */
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59 /* greater than this threshold, then an objlist_file will be generated */
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60 /* and object_file_option and objlist_file_supported must be set. If */
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61 /* objlist_file_supported is set to 0 (unsupported), then link_max is */
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62 /* set to 2**31-1 so that the limit will never be exceeded. */
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63
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64 /* run_path_option is the system dependent linker option which specifies */
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65 /* the run time path to use when loading dynamic libraries. This should */
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66 /* be set to the null string if the system does not support dynamic */
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67 /* loading of libraries. */
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68
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69 /* shared_libgnat_default gives the system dependent link method that */
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70 /* be used by default for linking libgnat (shared or static) */
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71
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72 /* shared_libgcc_default gives the system dependent link method that */
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73 /* be used by default for linking libgcc (shared or static) */
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74
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75 /* separate_run_path_options is set to 1 when separate "rpath" arguments */
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76 /* must be passed to the linker for each directory in the rpath. */
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77
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78 /* default_libgcc_subdir is the subdirectory name (from the installation */
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79 /* root) where we may find a shared libgcc to use by default. */
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80
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81 #define SHARED 'H'
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82 #define STATIC 'T'
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83
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84 #if defined (__WIN32)
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85 const char *__gnat_object_file_option = "-Wl,@";
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86 const char *__gnat_run_path_option = "";
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87 int __gnat_link_max = 30000;
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88 unsigned char __gnat_objlist_file_supported = 1;
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89 char __gnat_shared_libgnat_default = STATIC;
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90 char __gnat_shared_libgcc_default = STATIC;
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91 const char *__gnat_object_library_extension = ".a";
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92 unsigned char __gnat_separate_run_path_options = 0;
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93 const char *__gnat_default_libgcc_subdir = "lib";
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94
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95 #elif defined (__hpux__)
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96 const char *__gnat_object_file_option = "-Wl,-c,";
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97 const char *__gnat_run_path_option = "-Wl,+b,";
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98 int __gnat_link_max = 5000;
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99 unsigned char __gnat_objlist_file_supported = 1;
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100 char __gnat_shared_libgnat_default = STATIC;
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101 char __gnat_shared_libgcc_default = STATIC;
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102 const char *__gnat_object_library_extension = ".a";
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103 unsigned char __gnat_separate_run_path_options = 0;
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104 const char *__gnat_default_libgcc_subdir = "lib";
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105
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106 #elif defined (__FreeBSD__) || defined (__DragonFly__) \
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131
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107 || defined (__NetBSD__) || defined (__OpenBSD__) \
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108 || defined (__QNX__)
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111
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109 const char *__gnat_object_file_option = "-Wl,@";
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110 const char *__gnat_run_path_option = "-Wl,-rpath,";
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111 char __gnat_shared_libgnat_default = STATIC;
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112 char __gnat_shared_libgcc_default = STATIC;
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113 int __gnat_link_max = 8192;
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114 unsigned char __gnat_objlist_file_supported = 1;
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115 const char *__gnat_object_library_extension = ".a";
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116 unsigned char __gnat_separate_run_path_options = 0;
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117 const char *__gnat_default_libgcc_subdir = "lib";
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118
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119 #elif defined (__APPLE__)
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120 const char *__gnat_object_file_option = "-Wl,-filelist,";
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121 const char *__gnat_run_path_option = "-Wl,-rpath,";
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122 char __gnat_shared_libgnat_default = STATIC;
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123 char __gnat_shared_libgcc_default = SHARED;
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124 int __gnat_link_max = 262144;
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125 unsigned char __gnat_objlist_file_supported = 1;
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126 const char *__gnat_object_library_extension = ".a";
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127 unsigned char __gnat_separate_run_path_options = 1;
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128 const char *__gnat_default_libgcc_subdir = "lib";
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129
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130 #elif defined (__linux__) || defined (__GLIBC__)
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131 const char *__gnat_object_file_option = "-Wl,@";
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132 const char *__gnat_run_path_option = "-Wl,-rpath,";
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133 char __gnat_shared_libgnat_default = STATIC;
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134 char __gnat_shared_libgcc_default = STATIC;
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135 int __gnat_link_max = 8192;
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136 unsigned char __gnat_objlist_file_supported = 1;
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137 const char *__gnat_object_library_extension = ".a";
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138 unsigned char __gnat_separate_run_path_options = 0;
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139 #if defined (__x86_64)
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140 # if defined (__LP64__)
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141 const char *__gnat_default_libgcc_subdir = "lib64";
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142 # else
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143 const char *__gnat_default_libgcc_subdir = "libx32";
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144 # endif
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145 #else
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146 const char *__gnat_default_libgcc_subdir = "lib";
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147 #endif
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148
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149 #elif defined (_AIX)
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150 /* On AIX, even when with GNU ld we use native linker switches. This is
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151 particularly important for '-f' as it should be interpreted by collect2. */
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152
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153 const char *__gnat_object_file_option = "-Wl,-f,";
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154 const char *__gnat_run_path_option = "";
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155 char __gnat_shared_libgnat_default = STATIC;
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156 char __gnat_shared_libgcc_default = STATIC;
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157 int __gnat_link_max = 15000;
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158 unsigned char __gnat_objlist_file_supported = 1;
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159 const char *__gnat_object_library_extension = ".a";
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160 unsigned char __gnat_separate_run_path_options = 0;
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161 const char *__gnat_default_libgcc_subdir = "lib";
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162
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163 #elif (HAVE_GNU_LD)
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164 /* These are the settings for all systems that use gnu ld. GNU style response
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165 file is supported, the shared library default is STATIC. */
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166
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167 const char *__gnat_object_file_option = "-Wl,@";
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168 const char *__gnat_run_path_option = "";
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169 char __gnat_shared_libgnat_default = STATIC;
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170 char __gnat_shared_libgcc_default = STATIC;
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171 int __gnat_link_max = 8192;
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172 unsigned char __gnat_objlist_file_supported = 1;
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173 const char *__gnat_object_library_extension = ".a";
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174 unsigned char __gnat_separate_run_path_options = 0;
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175 const char *__gnat_default_libgcc_subdir = "lib";
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176
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177 #elif defined (VMS)
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178 const char *__gnat_object_file_option = "";
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179 const char *__gnat_run_path_option = "";
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180 char __gnat_shared_libgnat_default = STATIC;
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181 char __gnat_shared_libgcc_default = STATIC;
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182 int __gnat_link_max = 2147483647;
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183 unsigned char __gnat_objlist_file_supported = 0;
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184 const char *__gnat_object_library_extension = ".olb";
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185 unsigned char __gnat_separate_run_path_options = 0;
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186 const char *__gnat_default_libgcc_subdir = "lib";
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187
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188 #elif defined (__sun__)
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189 const char *__gnat_object_file_option = "";
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190 const char *__gnat_run_path_option = "-Wl,-R";
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191 char __gnat_shared_libgnat_default = STATIC;
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192 char __gnat_shared_libgcc_default = STATIC;
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193 int __gnat_link_max = 2147483647;
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194 unsigned char __gnat_objlist_file_supported = 0;
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195 const char *__gnat_object_library_extension = ".a";
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196 unsigned char __gnat_separate_run_path_options = 0;
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197 #if defined (__sparc_v9__) || defined (__sparcv9)
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198 const char *__gnat_default_libgcc_subdir = "lib/sparcv9";
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199 #elif defined (__x86_64)
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200 const char *__gnat_default_libgcc_subdir = "lib/amd64";
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201 #else
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202 const char *__gnat_default_libgcc_subdir = "lib";
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203 #endif
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204
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205 #elif defined (__svr4__) && defined (__i386__)
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206 const char *__gnat_object_file_option = "";
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207 const char *__gnat_run_path_option = "";
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208 char __gnat_shared_libgnat_default = STATIC;
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209 char __gnat_shared_libgcc_default = STATIC;
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210 int __gnat_link_max = 2147483647;
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211 unsigned char __gnat_objlist_file_supported = 0;
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212 const char *__gnat_object_library_extension = ".a";
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213 unsigned char __gnat_separate_run_path_options = 0;
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214 const char *__gnat_default_libgcc_subdir = "lib";
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215
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216 #else
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217
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218 /* These are the default settings for all other systems. No response file
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219 is supported, the shared library default is STATIC. */
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220 const char *__gnat_run_path_option = "";
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221 const char *__gnat_object_file_option = "";
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222 char __gnat_shared_libgnat_default = STATIC;
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223 char __gnat_shared_libgcc_default = STATIC;
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224 int __gnat_link_max = 2147483647;
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225 unsigned char __gnat_objlist_file_supported = 0;
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226 const char *__gnat_object_library_extension = ".a";
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227 unsigned char __gnat_separate_run_path_options = 0;
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228 const char *__gnat_default_libgcc_subdir = "lib";
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229 #endif
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230
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231 #ifdef __cplusplus
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232 }
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233 #endif
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