1 /****************************************************************************
3 * GNAT COMPILER COMPONENTS *
7 * C Implementation File *
9 * Copyright (C) 1992-2003, Free Software Foundation, Inc. *
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. *
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. *
28 * GNAT was originally developed by the GNAT team at New York University. *
29 * Extensive contributions were provided by Ada Core Technologies Inc. *
31 ****************************************************************************/
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 */
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. */
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 */
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. */
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. */
64 /* shared_libgnat_default gives the system dependent link method that */
65 /* be used by default for linking libgnat (shared or static) */
67 /* using_gnu_linker is set to 1 when the GNU linker is used under this */
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 ...) */
86 const char *object_file_option = "-Wl,-input,";
87 const char *run_path_option = "-Wl,-rpath,";
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";
95 const char *object_file_option = "-Wl,-objectlist,";
96 const char *run_path_option = "-Wl,-rpath,";
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";
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";
112 #elif defined (__INTERIX)
113 const char *object_file_option = "";
114 const char *run_path_option = "";
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";
122 const char *object_file_option = "-Wl,-c,";
123 const char *run_path_option = "-Wl,+b,";
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";
131 const char *object_file_option = "-Wl,-f,";
132 const char *run_path_option = "";
133 int link_max = 15000;
134 const unsigned char objlist_file_supported = 1;
135 char shared_libgnat_default = STATIC;
136 unsigned char using_gnu_linker = 0;
137 const char *object_library_extension = ".a";
140 const char *object_file_option = "";
141 const char *run_path_option = "";
142 char shared_libgnat_default = STATIC;
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";
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";
157 #elif defined (__FreeBSD__)
158 char *object_file_option = "";
159 char *run_path_option = "";
160 char shared_libgnat_default = SHARED;
161 int link_max = 2147483647;
162 unsigned char objlist_file_supported = 0;
163 unsigned char using_gnu_linker = 0;
164 char *object_library_extension = ".a";
166 #elif defined (linux)
167 const char *object_file_option = "";
168 const char *run_path_option = "-Wl,-rpath,";
169 char shared_libgnat_default = STATIC;
171 unsigned char objlist_file_supported = 1;
172 unsigned char using_gnu_linker = 1;
173 const char *object_library_extension = ".a";
175 #elif defined (__svr4__) && defined (i386)
176 const char *object_file_option = "";
177 const char *run_path_option = "";
178 char shared_libgnat_default = STATIC;
179 int link_max = 2147483647;
180 unsigned char objlist_file_supported = 0;
181 unsigned char using_gnu_linker = 0;
182 const char *object_library_extension = ".a";
186 /* These are the default settings for all other systems. No response file
187 is supported, the shared library default is STATIC. */
188 const char *run_path_option = "";
189 const char *object_file_option = "";
190 char shared_libgnat_default = STATIC;
191 int link_max = 2147483647;
192 unsigned char objlist_file_supported = 0;
193 unsigned char using_gnu_linker = 0;
194 const char *object_library_extension = ".a";