Commit | Line | Data |
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252b5132 | 1 | -*- text -*- |
cf88bb9f | 2 | |
e8fd7476 NC |
3 | * Added support for Xtensa architecture. |
4 | ||
9c8ebd6a DJ |
5 | * Added --with-sysroot configure switch to specify a target system root, for |
6 | linking against a target filesystem image. | |
7 | ||
312b768e NC |
8 | * Added --accept-unknown-linker-format to restore old linker behaviour (pre |
9 | 2.14) of silently accepting and linking in any files in an unknown binary | |
10 | file format. | |
11 | ||
63fd3b82 NC |
12 | * Added --no-omagic to undo the effects of the -N option. |
13 | ||
004d9caf NC |
14 | * Support for Texas Instruments TMS320C4x and TMS320C3x series of |
15 | DSP's contributed by Michael Hayes and Svein E. Seldal. | |
026df7c5 | 16 | |
8e523c23 NC |
17 | * Added --with-lib-path configure switch to specify default value for |
18 | LIB_PATH. | |
19 | ||
7e392df6 NC |
20 | * ARM port to QNX operating system added by Graeme Peterson. |
21 | ||
cf88bb9f NC |
22 | * IP2K support added by Denis Chertykov. |
23 | ||
2cbb2eef NC |
24 | Changes in 2.13: |
25 | ||
26 | * Support for the Fujitsu FRV architecture added by Red Hat. Models for FR400 | |
27 | and FR500 included. | |
7d553a40 | 28 | |
37020578 JT |
29 | Changes in version 2.13: |
30 | ||
31 | * DEC VAX ELF support, by Matt Thomas. | |
32 | ||
9a66911f NC |
33 | Changes in version 2.12: |
34 | ||
49fda6c8 HPN |
35 | * Support for Don Knuth's MMIX, by Hans-Peter Nilsson. |
36 | ||
3b16e843 NC |
37 | * Support for the OpenRISC 32-bit embedded processor by OpenCores. |
38 | ||
8bd621d8 AM |
39 | * Support for -z nocopyreloc in the x86 ELF linker, which disables |
40 | production of copy relocs. Warning: using this option may result in | |
41 | non-sharable applications. | |
5b343f5a | 42 | |
db6751f2 JJ |
43 | * Support for -z combreloc in the ELF linker, which puts dynamic |
44 | relocations against the same symbol together, so that dynamic linker | |
45 | can use an one-entry symbol lookup cache. | |
46 | ||
47 | * Support for ELF SHF_MERGE section merging, by Jakub Jelinek. | |
48 | ||
9a66911f NC |
49 | Changes in version 2.11: |
50 | ||
b8355149 JH |
51 | * Support for AMD x86-64 architecture, by Jan Hubicka, SuSE Labs. |
52 | ||
18e03609 NC |
53 | * Support added for eliminating duplicate DWARF2 debug information by |
54 | having the compiler generate the information in sections called | |
55 | .gnu.linkonce.wi.XXXX where XXXX is a checksum for the contents. The | |
56 | linker then merges these sections together into the normal .debug_info | |
57 | section. | |
252b5132 | 58 | |
ec4eb78a L |
59 | * The native ELF linker now searches the directories in DT_RUNPATH or |
60 | DT_RPATH of a shared library for shared libraries needed by it. | |
61 | ||
2d30b3da TW |
62 | * TI C54x support, by Timothy Wall. |
63 | ||
176355da NC |
64 | * Added command line switch --section-start to set the start address of any |
65 | specified section. | |
66 | ||
a712da20 NC |
67 | * Added ability to emit full relocation information in linked executables, |
68 | enabled by --emit-relocs. Some post-linkage optimization tools need | |
69 | this information in order to be able to correctly identify and perform | |
70 | symbol relative addressing in the event of changes in section contents | |
71 | (instructions being added or deleted, extending data sections, etc.) | |
72 | ||
22b36938 JE |
73 | * Support for i860, by Jason Eckhardt (preliminary, alpha quality). |
74 | ||
5bcac8a4 HPN |
75 | * Support for CRIS (Axis Communications ETRAX series). |
76 | ||
500800ca NC |
77 | * Support for PDP-11 and 2.11BSD a.out format, by Lars Brinkhoff. |
78 | ||
919e4093 AM |
79 | Changes in version 2.10: |
80 | ||
5948916f TW |
81 | * Added AT> to the linker script language to allow load-time allocation of |
82 | sections into regions. | |
83 | ||
252b5132 RH |
84 | * Added garbage collection of unused sections, enabled by --gc-sections. |
85 | It does require a bit of backend support; currently implemented are | |
4667035e AM |
86 | arm-elf, avr-elf, d10v-elf, fr30-elf, i386-elf, m32r-elf, m68k-elf, |
87 | mcore-elf, mips-elf, mn10300-elf, ppc-elf, sh-elf, sparc-elf, and v850-elf. | |
987fd5b4 | 88 | Others will ignore the option. |
252b5132 RH |
89 | |
90 | * Added SORT to the linker script language to permit sorting sections by file | |
91 | name or section name. | |
92 | ||
93 | * Added EXTERN to the linker script language as an equivalent to the -u | |
94 | command-line option. | |
95 | ||
96 | * Added ASSERT to the linker script language. | |
97 | ||
277c9afe ILT |
98 | * Added EXCLUDE_FILE to the linker script language for further control over |
99 | wildcard file names. | |
100 | ||
252b5132 | 101 | * Added -O option to optimize linker output (as of this writing, this only |
500800ca | 102 | affects ELF shared library generation). |
252b5132 RH |
103 | |
104 | * The -e option now accepts a number as well as a symbol name. | |
105 | ||
2575273d ILT |
106 | * Added --no-undefined option to disallow undefined symbols when creating a |
107 | shared library. | |
108 | ||
9b1d3b78 ILT |
109 | * The linker now issues a warning, not an error, for an undefined symbol when |
110 | using -Bsymbolic; use the new --no-undefined option to get the old | |
111 | behaviour. | |
112 | ||
252b5132 RH |
113 | * Added --demangle and --no-demangle options. |
114 | ||
115 | Changes in version 2.9: | |
116 | ||
117 | * Added SQUAD to the linker script language. | |
118 | ||
119 | * New option --no-warn-mismatch. | |
120 | ||
121 | * The MEMORY command now parses the attributes to determine where sections that | |
122 | are not placed in a specific memory region are placed. | |
123 | ||
124 | Changes in version 2.8: | |
125 | ||
126 | * Linker scripts may now contain shell wildcard characters for file and section | |
127 | names. | |
128 | ||
129 | * The linker now supports symbol versions in ELF. | |
130 | ||
131 | * The NOCROSSREFS command was added to the linker script language. | |
132 | ||
133 | * The LOADADDR expression was added to the linker script language. | |
134 | ||
135 | * MAX and MIN functions were added to the linker script language. | |
136 | ||
137 | * The OVERLAY construct was added to the linker script language. | |
138 | ||
139 | * New option --warn-section-align to warn when the address of an output section | |
140 | changes due to alignment of an input section. | |
141 | ||
142 | * New options --filter/-F and --auxiliary/-f. | |
143 | ||
144 | Changes in version 2.7: | |
145 | ||
146 | * New option --cref to print out a cross reference table. | |
147 | ||
148 | * New option --wrap SYMBOL. | |
149 | ||
150 | * New option --no-whole-archive, to turn off the effect of --whole-archive. | |
151 | ||
152 | * Input sections assigned to the output section /DISCARD/ in the linker script | |
153 | are not included in the output file. | |
154 | ||
155 | * The SunOS and ELF linkers now merge stabs debugging information which uses | |
156 | the N_BINCL and N_EINCL stab types. This reduces the amount of debugging | |
157 | information generated. | |
158 | ||
159 | Changes in version 2.6: | |
160 | ||
161 | * When an ELF section name is representable as a C identifier (this is not true | |
162 | of most ELF section names), the linker will automatically define symbols | |
163 | __start_SECNAME and __stop_SECNAME, where SECNAME is the section name, at the | |
164 | beginning and the end of the section. This is used by glibc. | |
165 | ||
166 | * When an ELF section named .gnu.warning is encountered in an input file, the | |
167 | contents of the section are displayed as an error message, and the section is | |
168 | not copied into the output file. This is used by glibc. | |
169 | ||
170 | * When an ELF section named .gnu.warning.SYMBOL is encountered in an input | |
171 | file, and the symbol SYMBOL is referenced by some object file, the contents of | |
172 | the section are displayed as an error message. The section is not copied into | |
173 | the output file, unless doing a relocateable or shared link. This is used by | |
174 | glibc. | |
175 | ||
176 | * New options -split-by-reloc and -split-by-file. | |
177 | ||
178 | * The linker now supports linking PIC compiled code on SPARC SunOS. It can | |
179 | also create SPARC SunOS shared libraries, and, like the native SunOS linker, | |
180 | will do so whenever there is an undefined symbol in the link and neither the -e | |
181 | nor the -r option was used. | |
182 | ||
183 | * The -rpath option may be used on SunOS to set the list of directories to be | |
184 | searched at run time. This overrides the default of building the list from the | |
185 | -L options. | |
186 | ||
187 | * The COFF linker now combines debugging information for structs, unions, and | |
188 | enums, so that even if the same type is defined in multiple input files it will | |
189 | only be defined once in the output file. The --traditional-format switch will | |
190 | prevent this optimization. | |
191 | ||
192 | Changes in version 2.5: | |
193 | ||
194 | * The linker now supports linking against SunOS shared libraries. It still can | |
195 | not link SunOS PIC (Position Independent Code) files, so it can not be used to | |
196 | generate shared libaries. | |
197 | ||
198 | * The linker now supports linking against ELF shared libraries for the i386 | |
199 | (UnixWare) and SPARC (Solaris). It can also link ELF PIC files, and can be | |
200 | used to generate shared libraries. Shared library generation is not well | |
201 | tested; please report any problems encountered. The linker is now enabled for | |
202 | Solaris again. | |
203 | ||
204 | * Eric Youngdale has contributed Linux support code, including linking against | |
205 | Linux a.out shared libraries. The linker produces Linux QMAGIC binaries. | |
206 | ||
207 | * The ELF backend has been converted to the new linker code. To use the new | |
208 | ELF linker, each particular target requires a relocation function. So far, | |
209 | this function has been written for i386 (UnixWare), SPARC (Solaris) MIPS (Irix | |
210 | 5), and HPPA ELF targets. | |
211 | ||
212 | * The -( (--start-group) and -) (--end-group) options have been added to | |
213 | support searching a group of archives as though they were a single archive. | |
214 | This can also be used in a linker script, as GROUP ( files ). | |
215 | ||
216 | * When a file is named on the command line, and the linker does not recognize | |
217 | it as an object file, the linker will now treat the file as a linker script | |
218 | file. A linker script named in this way augments, but does not replace, the | |
219 | default linker script. | |
220 | ||
221 | * The -warn-once option was added. It causes the linker to only warn once per | |
222 | undefined symbol, rather than once per reference. | |
223 | ||
224 | * The COFF backend has been converted to the new linker code. As with ELF, to | |
225 | use the new linker, each particular target requires a relocation function. So | |
226 | far, this function has been written for the i386, m68k, a29k and SH targets. | |
227 | ||
228 | * The -V flag was made a synonym for -v, for SVR4 compatibility. The old -V | |
229 | behaviour is available via --verbose. | |
230 | ||
231 | Changes in version 2.4: | |
232 | ||
233 | * New linker code, by Steve Chamberlain and Ian Taylor. For a.out and ecoff | |
234 | formats (so far), this should result in considerable savings in time | |
235 | and memory used while linking; slightly poorer performance than | |
236 | before for formats not converted yet. | |
237 | ||
238 | * Command-line parsing is no longer done with flex. This means | |
239 | oddball characters in filenames won't get treated as argument | |
240 | separators. | |
241 | ||
242 | * HP-PA ELF support, by Jeff Law. (No SOM support yet.) | |
243 | ||
244 | * Mach i386 support, by David Mackenzie. | |
245 | ||
246 | * Irix 4 shared libraries are now supported (Irix 5 uses ELF, and ELF shared | |
247 | libraries are not yet supported). | |
248 | ||
249 | * COFF shared libraries (as on SCO) should work as well. | |
250 | ||
251 | * The linker is disabled for Solaris. (Actually, it was in 2.3 also, I just | |
252 | forgot to note it.) Some of their C library routines don't work when | |
253 | statically linked, and the GNU linker doesn't support dynamic linking yet. | |
254 | ||
255 | Changes in version 2.3: | |
256 | ||
257 | * Weak symbols are now supported. | |
258 | ||
259 | * ELF support has been added. The linker has been bootstrapped on | |
260 | UnixWare and Solaris. | |
261 | ||
262 | * Alpha OSF/1 support has been added (non dynamic linking only). | |
263 | ||
264 | Changes in version 2.2: | |
265 | ||
266 | * The `bfd' library has been updated to reduce a.out-format string | |
267 | table size. The effect of this is that files linked from many input | |
268 | files with duplicate symbols (`-g' debugging records, or identical | |
269 | static symbols) should be much smaller. | |
270 | ||
271 | Changes in version 2.1: | |
272 | ||
273 | * The ld -ySYMBOL flag (to trace references to SYMBOL) is now implemented. | |
274 | ||
275 | * There is now support for writing ECOFF files, so ld and the | |
276 | other utilities should work on Risc/Ultrix and Irix. | |
277 | ||
278 | \f | |
279 | Local variables: | |
280 | fill-column: 79 | |
281 | End: |