git://gcc.gnu.org / gcc.git / blame
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1 | /**************************************************************************** |
| 2 | * * | |
| 3 | * GNAT COMPILER COMPONENTS * | |
| 4 | * * | |
| 5 | * L I N K * | |
| 6 | * * | |
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7 | * C Implementation File * |
| 8 | * * | |
| fbf5a39b | 9 | * Copyright (C) 1992-2003, Free Software Foundation, Inc. * |
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10 | * * |
| 11 | * GNAT is free software; you can redistribute it and/or modify it under * | |
| 12 | * terms of the GNU General Public License as published by the Free Soft- * | |
| 13 | * ware Foundation; either version 2, or (at your option) any later ver- * | |
| 14 | * sion. GNAT is distributed in the hope that it will be useful, but WITH- * | |
| 15 | * OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY * | |
| 16 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * | |
| 17 | * for more details. You should have received a copy of the GNU General * | |
| 18 | * Public License distributed with GNAT; see file COPYING. If not, write * | |
| 19 | * to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, * | |
| 20 | * MA 02111-1307, USA. * | |
| 21 | * * | |
| 22 | * As a special exception, if you link this file with other files to * | |
| 23 | * produce an executable, this file does not by itself cause the resulting * | |
| 24 | * executable to be covered by the GNU General Public License. This except- * | |
| 25 | * ion does not however invalidate any other reasons why the executable * | |
| 26 | * file might be covered by the GNU Public License. * | |
| 27 | * * | |
| 28 | * GNAT was originally developed by the GNAT team at New York University. * | |
| 71ff80dc | 29 | * Extensive contributions were provided by Ada Core Technologies Inc. * |
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30 | * * |
| 31 | ****************************************************************************/ | |
| 32 | ||
| 33 | /* This file contains parameterizations used by gnatlink.adb in handling */ | |
| 34 | /* very long linker lines in systems where there are limitations on the */ | |
| 35 | /* argument length when the command line is used to pass items to the */ | |
| 36 | /* linker */ | |
| 37 | ||
| 38 | #include <string.h> | |
| 39 | ||
| 40 | /* objlist_file_supported is set to 1 when the system linker allows */ | |
| 41 | /* response file, that is a file that contains the list of object files. */ | |
| 42 | /* This is useful on systems where the command line length is limited, */ | |
| 43 | /* meaning that putting all the object files on the command line can */ | |
| 44 | /* result in an unacceptable limit on the number of files. */ | |
| 45 | ||
| 46 | /* object_file_option denotes the system dependent linker option which */ | |
| 47 | /* allows object file names to be placed in a file and then passed to */ | |
| 48 | /* the linker. object_file_option must be set if objlist_file_supported */ | |
| 49 | /* is set to 1. */ | |
| 50 | ||
| 51 | /* link_max is a conservative system specific threshold (in bytes) of the */ | |
| 52 | /* argument length passed to the linker which will trigger a file being */ | |
| 53 | /* used instead of the command line directly. If the argument length is */ | |
| 54 | /* greater than this threshhold, then an objlist_file will be generated */ | |
| 55 | /* and object_file_option and objlist_file_supported must be set. If */ | |
| 56 | /* objlist_file_supported is set to 0 (unsupported), then link_max is */ | |
| 57 | /* set to 2**31-1 so that the limit will never be exceeded. */ | |
| 58 | ||
| 59 | /* run_path_option is the system dependent linker option which specifies */ | |
| 60 | /* the run time path to use when loading dynamic libraries. This should */ | |
| 61 | /* be set to the null string if the system does not support dynmamic */ | |
| 62 | /* loading of libraries. */ | |
| 63 | ||
| 64 | /* shared_libgnat_default gives the system dependent link method that */ | |
| 65 | /* be used by default for linking libgnat (shared or static) */ | |
| 66 | ||
| 67 | /* using_gnu_linker is set to 1 when the GNU linker is used under this */ | |
| 68 | /* target. */ | |
| 69 | ||
| 70 | /* RESPONSE FILE & GNU LINKER */ | |
| 71 | /* -------------------------- */ | |
| 72 | /* objlist_file_supported and using_gnu_link used together tell gnatlink */ | |
| 73 | /* to generate a GNU style response file. Note that object_file_option */ | |
| 74 | /* must be set to "" in this case, since no option is required for a */ | |
| 75 | /* response file to be passed to GNU ld. With a GNU linker we use the */ | |
| 76 | /* linker script to implement the response file feature. Any file passed */ | |
| 77 | /* in the GNU ld command line with an unknown extension is supposed to be */ | |
| 78 | /* a linker script. Each linker script augment the current configuration. */ | |
| 79 | /* The format of such response file is as follow : */ | |
| 80 | /* INPUT (obj1.p obj2.o ...) */ | |
| 81 | ||
| 82 | #define SHARED 'H' | |
| 83 | #define STATIC 'T' | |
| 84 | ||
| 85 | #if defined (__osf__) | |
| 86 | const char *object_file_option = "-Wl,-input,"; | |
| 87 | const char *run_path_option = "-Wl,-rpath,"; | |
| 88 | int link_max = 10000; | |
| 89 | unsigned char objlist_file_supported = 1; | |
| 90 | char shared_libgnat_default = STATIC; | |
| 91 | unsigned char using_gnu_linker = 0; | |
| 92 | const char *object_library_extension = ".a"; | |
| 93 | ||
| 94 | #elif defined (sgi) | |
| 95 | const char *object_file_option = "-Wl,-objectlist,"; | |
| 96 | const char *run_path_option = "-Wl,-rpath,"; | |
| 97 | int link_max = 5000; | |
| 98 | unsigned char objlist_file_supported = 1; | |
| 99 | char shared_libgnat_default = SHARED; | |
| 100 | unsigned char using_gnu_linker = 0; | |
| 101 | const char *object_library_extension = ".a"; | |
| 102 | ||
| 103 | #elif defined (__WIN32) | |
| 104 | const char *object_file_option = ""; | |
| 105 | const char *run_path_option = ""; | |
| 106 | int link_max = 30000; | |
| 107 | unsigned char objlist_file_supported = 1; | |
| 108 | char shared_libgnat_default = STATIC; | |
| 109 | unsigned char using_gnu_linker = 1; | |
| 110 | const char *object_library_extension = ".a"; | |
| 111 | ||
| 112 | #elif defined (__INTERIX) | |
| 113 | const char *object_file_option = ""; | |
| 114 | const char *run_path_option = ""; | |
| 115 | int link_max = 5000; | |
| 116 | unsigned char objlist_file_supported = 1; | |
| 117 | char shared_libgnat_default = STATIC; | |
| 118 | unsigned char using_gnu_linker = 1; | |
| 119 | const char *object_library_extension = ".a"; | |
| 120 | ||
| 121 | #elif defined (hpux) | |
| 122 | const char *object_file_option = "-Wl,-c,"; | |
| 123 | const char *run_path_option = "-Wl,+b,"; | |
| 124 | int link_max = 5000; | |
| 125 | unsigned char objlist_file_supported = 1; | |
| 126 | char shared_libgnat_default = STATIC; | |
| 127 | unsigned char using_gnu_linker = 0; | |
| 128 | const char *object_library_extension = ".a"; | |
| 129 | ||
| 130 | #elif defined (_AIX) | |
| 131 | const char *object_file_option = "-Wl,-f,"; | |
| 132 | const char *run_path_option = ""; | |
| 133 | int link_max = 15000; | |
| b174e2d4 | 134 | const unsigned char objlist_file_supported = 1; |
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135 | char shared_libgnat_default = STATIC; |
| 136 | unsigned char using_gnu_linker = 0; | |
| 137 | const char *object_library_extension = ".a"; | |
| 138 | ||
| 139 | #elif defined (VMS) | |
| 140 | const char *object_file_option = ""; | |
| 141 | const char *run_path_option = ""; | |
| 142 | char shared_libgnat_default = SHARED; | |
| 143 | int link_max = 2147483647; | |
| 144 | unsigned char objlist_file_supported = 0; | |
| 145 | unsigned char using_gnu_linker = 0; | |
| 146 | const char *object_library_extension = ".olb"; | |
| 147 | ||
| 148 | #elif defined (sun) | |
| 149 | const char *object_file_option = ""; | |
| 150 | const char *run_path_option = "-R"; | |
| 151 | char shared_libgnat_default = STATIC; | |
| 152 | int link_max = 2147483647; | |
| 153 | unsigned char objlist_file_supported = 0; | |
| 154 | unsigned char using_gnu_linker = 0; | |
| 155 | const char *object_library_extension = ".a"; | |
| 156 | ||
| 157 | #elif defined (linux) | |
| 158 | const char *object_file_option = ""; | |
| 159 | const char *run_path_option = "-Wl,-rpath,"; | |
| 160 | char shared_libgnat_default = STATIC; | |
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161 | int link_max = 8192; |
| 162 | unsigned char objlist_file_supported = 1; | |
| 163 | unsigned char using_gnu_linker = 1; | |
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164 | const char *object_library_extension = ".a"; |
| 165 | ||
| 166 | #elif defined (__svr4__) && defined (i386) | |
| 167 | const char *object_file_option = ""; | |
| 168 | const char *run_path_option = ""; | |
| 169 | char shared_libgnat_default = STATIC; | |
| 170 | int link_max = 2147483647; | |
| 171 | unsigned char objlist_file_supported = 0; | |
| 172 | unsigned char using_gnu_linker = 0; | |
| 173 | const char *object_library_extension = ".a"; | |
| 174 | ||
| 175 | #else | |
| 176 | ||
| 177 | /* These are the default settings for all other systems. No response file | |
| 178 | is supported, the shared library default is STATIC. */ | |
| 179 | const char *run_path_option = ""; | |
| 180 | const char *object_file_option = ""; | |
| 181 | char shared_libgnat_default = STATIC; | |
| 182 | int link_max = 2147483647; | |
| 183 | unsigned char objlist_file_supported = 0; | |
| 184 | unsigned char using_gnu_linker = 0; | |
| 185 | const char *object_library_extension = ".a"; | |
| 186 | #endif |