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[binutils.git] / ld / ld.h
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1 /* ld.h -- general linker header file
2 Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005
4 Free Software Foundation, Inc.
6 This file is part of GLD, the Gnu Linker.
8 GLD is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
11 any later version.
13 GLD is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GLD; see the file COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
21 02110-1301, USA. */
23 #ifndef LD_H
24 #define LD_H
26 #ifdef HAVE_LOCALE_H
27 #endif
28 #ifndef SEEK_CUR
29 #define SEEK_CUR 1
30 #endif
31 #ifndef SEEK_END
32 #define SEEK_END 2
33 #endif
35 #if defined(__GNUC__) && !defined(C_ALLOCA)
36 # undef alloca
37 # define alloca __builtin_alloca
38 #else
39 # if defined(HAVE_ALLOCA_H) && !defined(C_ALLOCA)
40 # include <alloca.h>
41 # else
42 # ifndef alloca /* predefined by HP cc +Olibcalls */
43 # if !defined (__STDC__) && !defined (__hpux)
44 char *alloca ();
45 # else
46 void *alloca ();
47 # endif /* __STDC__, __hpux */
48 # endif /* alloca */
49 # endif /* HAVE_ALLOCA_H */
50 #endif
53 #ifdef HAVE_LOCALE_H
54 # ifndef ENABLE_NLS
55 /* The Solaris version of locale.h always includes libintl.h. If we have
56 been configured with --disable-nls then ENABLE_NLS will not be defined
57 and the dummy definitions of bindtextdomain (et al) below will conflict
58 with the defintions in libintl.h. So we define these values to prevent
59 the bogus inclusion of libintl.h. */
60 # define _LIBINTL_H
61 # define _LIBGETTEXT_H
62 # endif
63 # include <locale.h>
64 #endif
66 #ifdef ENABLE_NLS
67 # include <libintl.h>
68 # define _(String) gettext (String)
69 # ifdef gettext_noop
70 # define N_(String) gettext_noop (String)
71 # else
72 # define N_(String) (String)
73 # endif
74 #else
75 # define gettext(Msgid) (Msgid)
76 # define dgettext(Domainname, Msgid) (Msgid)
77 # define dcgettext(Domainname, Msgid, Category) (Msgid)
78 # define textdomain(Domainname) while (0) /* nothing */
79 # define bindtextdomain(Domainname, Dirname) while (0) /* nothing */
80 # define _(String) (String)
81 # define N_(String) (String)
82 #endif
84 #include "bin-bugs.h"
86 /* Look in this environment name for the linker to pretend to be */
87 #define EMULATION_ENVIRON "LDEMULATION"
88 /* If in there look for the strings: */
90 /* Look in this variable for a target format */
91 #define TARGET_ENVIRON "GNUTARGET"
93 /* Input sections which are put in a section of this name are actually
94 discarded. */
95 #define DISCARD_SECTION_NAME "/DISCARD/"
97 /* A file name list */
98 typedef struct name_list {
99 const char *name;
100 struct name_list *next;
102 name_list;
104 /* A wildcard specification. */
106 typedef enum {
107 none, by_name, by_alignment, by_name_alignment, by_alignment_name
108 } sort_type;
110 extern sort_type sort_section;
112 struct wildcard_spec {
113 const char *name;
114 struct name_list *exclude_name_list;
115 sort_type sorted;
118 struct wildcard_list {
119 struct wildcard_list *next;
120 struct wildcard_spec spec;
123 struct map_symbol_def {
124 struct bfd_link_hash_entry *entry;
125 struct map_symbol_def *next;
128 /* The initial part of fat_user_section_struct has to be idential with
129 lean_user_section_struct. */
130 typedef struct fat_user_section_struct {
131 /* For input sections, when writing a map file: head / tail of a linked
132 list of hash table entries for symbols defined in this section. */
133 struct map_symbol_def *map_symbol_def_head;
134 struct map_symbol_def **map_symbol_def_tail;
135 } fat_section_userdata_type;
137 #define get_userdata(x) ((x)->userdata)
139 #define BYTE_SIZE (1)
140 #define SHORT_SIZE (2)
141 #define LONG_SIZE (4)
142 #define QUAD_SIZE (8)
144 typedef struct {
145 /* 1 => assign space to common symbols even if `relocatable_output'. */
146 bfd_boolean force_common_definition;
148 /* 1 => do not assign addresses to common symbols. */
149 bfd_boolean inhibit_common_definition;
150 bfd_boolean relax;
152 /* Name of runtime interpreter to invoke. */
153 char *interpreter;
155 /* Name to give runtime libary from the -soname argument. */
156 char *soname;
158 /* Runtime library search path from the -rpath argument. */
159 char *rpath;
161 /* Link time runtime library search path from the -rpath-link
162 argument. */
163 char *rpath_link;
165 /* Big or little endian as set on command line. */
166 enum { ENDIAN_UNSET = 0, ENDIAN_BIG, ENDIAN_LITTLE } endian;
168 /* If TRUE, build MIPS embedded PIC relocation tables in the output
169 file. */
170 bfd_boolean embedded_relocs;
172 /* If TRUE, force generation of a file with a .exe file. */
173 bfd_boolean force_exe_suffix;
175 /* If TRUE, generate a cross reference report. */
176 bfd_boolean cref;
178 /* If TRUE (which is the default), warn about mismatched input
179 files. */
180 bfd_boolean warn_mismatch;
182 /* Name of shared object whose symbol table should be filtered with
183 this shared object. From the --filter option. */
184 char *filter_shlib;
186 /* Name of shared object for whose symbol table this shared object
187 is an auxiliary filter. From the --auxiliary option. */
188 char **auxiliary_filters;
190 /* A version symbol to be applied to the symbol names found in the
191 .exports sections. */
192 char *version_exports_section;
194 /* If TRUE (the default) check section addresses, once compute,
195 fpor overlaps. */
196 bfd_boolean check_section_addresses;
198 /* If TRUE allow the linking of input files in an unknown architecture
199 assuming that the user knows what they are doing. This was the old
200 behaviour of the linker. The new default behaviour is to reject such
201 input files. */
202 bfd_boolean accept_unknown_input_arch;
204 /* If TRUE reduce memory overheads, at the expense of speed.
205 This will cause map file generation to use an O(N^2) algorithm. */
206 bfd_boolean reduce_memory_overheads;
208 } args_type;
210 extern args_type command_line;
212 typedef int token_code_type;
214 typedef struct {
215 bfd_size_type specified_data_size;
216 bfd_boolean magic_demand_paged;
217 bfd_boolean make_executable;
219 /* If TRUE, doing a dynamic link. */
220 bfd_boolean dynamic_link;
222 /* If TRUE, -shared is supported. */
223 /* ??? A better way to do this is perhaps to define this in the
224 ld_emulation_xfer_struct since this is really a target dependent
225 parameter. */
226 bfd_boolean has_shared;
228 /* If TRUE, build constructors. */
229 bfd_boolean build_constructors;
231 /* If TRUE, warn about any constructors. */
232 bfd_boolean warn_constructors;
234 /* If TRUE, warn about merging common symbols with others. */
235 bfd_boolean warn_common;
237 /* If TRUE, only warn once about a particular undefined symbol. */
238 bfd_boolean warn_once;
240 /* If TRUE, warn if multiple global-pointers are needed (Alpha
241 only). */
242 bfd_boolean warn_multiple_gp;
244 /* If TRUE, warn if the starting address of an output section
245 changes due to the alignment of an input section. */
246 bfd_boolean warn_section_align;
248 /* If TRUE, warning messages are fatal */
249 bfd_boolean fatal_warnings;
251 bfd_boolean sort_common;
253 bfd_boolean text_read_only;
255 char *map_filename;
256 FILE *map_file;
258 bfd_boolean stats;
260 /* If set, orphan input sections will be mapped to separate output
261 sections. */
262 bfd_boolean unique_orphan_sections;
264 unsigned int split_by_reloc;
265 bfd_size_type split_by_file;
267 /* If set, only search library directories explicitly selected
268 on the command line. */
269 bfd_boolean only_cmd_line_lib_dirs;
271 /* The size of the hash table to use. */
272 bfd_size_type hash_table_size;
273 } ld_config_type;
275 extern ld_config_type config;
277 extern FILE * saved_script_handle;
278 extern bfd_boolean force_make_executable;
280 /* Non-zero if we are processing a --defsym from the command line. */
281 extern int parsing_defsym;
283 extern int yyparse (void);
284 extern void add_cref (const char *, bfd *, asection *, bfd_vma);
285 extern void output_cref (FILE *);
286 extern void check_nocrossrefs (void);
287 extern void ld_abort (const char *, int, const char *) ATTRIBUTE_NORETURN;
289 /* If gcc >= 2.6, we can give a function name, too. */
290 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 6)
291 #define __PRETTY_FUNCTION__ NULL
292 #endif
294 #undef abort
295 #define abort() ld_abort (__FILE__, __LINE__, __PRETTY_FUNCTION__)
297 #endif