binutils-gdb/gold
Ian Lance Taylor 719328e148 PR 10980
* options.h (class General_options): Permit two dashes with
	--retain-symbols-file.
2009-12-31 06:05:49 +00:00
..
po PR 10895 2009-11-03 15:20:30 +00:00
testsuite PR 10979 2009-12-31 05:07:22 +00:00
ChangeLog PR 10980 2009-12-31 06:05:49 +00:00
Makefile.am 2009-12-17 Rafael Avila de Espindola <espindola@google.com> 2009-12-17 16:02:03 +00:00
Makefile.in 2009-12-17 Rafael Avila de Espindola <espindola@google.com> 2009-12-17 16:02:03 +00:00
NEWS * NEWS: New file. 2008-03-25 21:55:29 +00:00
README Add support for -pie. 2009-10-14 05:25:02 +00:00
TODO * TODO: New file. 2008-04-03 00:33:37 +00:00
aclocal.m4 Regenerate tree using Autoconf 2.64 and Automake 1.11. 2009-08-22 16:56:56 +00:00
archive.cc * archive.cc (Archive::add_symbols): Only look up a symbol without 2009-12-15 22:05:22 +00:00
archive.h 2009-05-19 Doug Kwan <dougkwan@google.com> 2009-05-19 22:14:17 +00:00
arm.cc * layout.cc (Layout::Layout): Initialize increase_relro_. 2009-12-30 06:57:17 +00:00
attributes.cc 2009-12-28 Chris Demetriou <cgd@google.com> 2009-12-29 06:09:03 +00:00
attributes.h Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
binary.cc * binary.cc: Fix file comment. 2009-02-07 01:03:32 +00:00
binary.h Add support for --format binary for input files. 2008-02-08 07:06:58 +00:00
common.cc PR 10979 2009-12-31 05:07:22 +00:00
common.h * mapfile.cc: New file. 2008-05-21 21:37:44 +00:00
compressed_output.cc Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
compressed_output.h Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
config.in 2009-12-17 Rafael Avila de Espindola <espindola@google.com> 2009-12-17 16:02:03 +00:00
configure * configure.ac: Set the MCMODEL_MEDIUM conditional to false if 2009-12-29 22:49:13 +00:00
configure.ac * configure.ac: Set the MCMODEL_MEDIUM conditional to false if 2009-12-29 22:49:13 +00:00
configure.tgt 2009-05-28 Doug Kwan <dougkwan@google.com> 2009-05-29 00:15:12 +00:00
copy-relocs.cc * layout.cc (Layout::Layout): Initialize increase_relro_. 2009-12-30 06:57:17 +00:00
copy-relocs.h Handle output sections with more than 0x7fffffff bytes. 2008-07-10 23:01:20 +00:00
cref.cc * cref.cc: New file. 2008-07-22 22:08:43 +00:00
cref.h * cref.cc: New file. 2008-07-22 22:08:43 +00:00
debug.h 2009-09-17 Doug Kwan <dougkwan@google.com> 2009-09-18 01:10:38 +00:00
defstd.cc PR 10876 2009-11-07 02:02:29 +00:00
defstd.h Update copyright years. Update language files. 2008-03-13 21:04:21 +00:00
descriptors.cc * descriptor.cc: Include <cstdio> and "binary-io.h". 2009-10-10 04:56:43 +00:00
descriptors.h 2009-03-23 Ian Lance Taylor <iant@google.com> 2009-03-24 04:50:32 +00:00
dirsearch.cc * readsyms.cc (Read_symbols::incompatible_warning): New function. 2009-03-14 05:56:46 +00:00
dirsearch.h * readsyms.cc (Read_symbols::incompatible_warning): New function. 2009-03-14 05:56:46 +00:00
dwarf_reader.cc Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
dwarf_reader.h 2009-12-08 Doug Kwan <dougkwan@google.com> 2009-12-09 03:02:28 +00:00
dynobj.cc PR 10450 2009-12-30 08:29:37 +00:00
dynobj.h Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
ehframe.cc Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
ehframe.h Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
errors.cc Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
errors.h 2009-03-23 Ian Lance Taylor <iant@google.com> 2009-03-24 04:50:32 +00:00
expression.cc Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
ffsll.c * ffsll.c (ffsll): Correct implementation. 2009-03-30 23:17:11 +00:00
fileread.cc Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
fileread.h Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
freebsd.h Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
ftruncate.c * ffsll.c: New file. 2009-03-28 05:22:30 +00:00
gc.cc 2009-01-20 Sriraman Tallam <tmsriram@google.com> 2009-01-28 02:25:33 +00:00
gc.h * object.h (class Relobj): Drop options parameter from 2009-10-29 05:16:23 +00:00
gold-threads.cc * target-select.cc (instantiate_target): Don't acquire the lock if 2009-03-24 17:32:43 +00:00
gold-threads.h 2009-03-23 Ian Lance Taylor <iant@google.com> 2009-03-24 04:50:32 +00:00
gold.cc * gold.cc (queue_middle_tasks): Fix formatting. 2009-12-29 00:22:43 +00:00
gold.h 2009-10-21 Doug Kwan <dougkwan@google.com> 2009-10-21 08:08:41 +00:00
i386.cc PR 10450 2009-12-30 07:22:06 +00:00
icf.cc Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
icf.h Sriraman Tallam <tmsriram@google.com> 2009-08-12 19:03:16 +00:00
incremental-dump.cc 2009-12-07 Rafael Avila de Espindola <espindola@google.com> 2009-12-07 21:36:52 +00:00
incremental.cc 2009-12-04 Rafael Avila de Espindola <espindola@google.com> 2009-12-04 18:18:18 +00:00
incremental.h Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
int_encoding.cc 2009-12-08 Doug Kwan <dougkwan@google.com> 2009-12-09 03:02:28 +00:00
int_encoding.h 2009-12-08 Doug Kwan <dougkwan@google.com> 2009-12-09 03:02:28 +00:00
layout.cc PR 10979 2009-12-31 05:43:29 +00:00
layout.h PR 10979 2009-12-31 03:48:46 +00:00
main.cc 2009-12-29 Rafael Espindola <espindola@google.com> 2009-12-29 23:45:10 +00:00
mapfile.cc Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
mapfile.h 2008-08-06 Cary Coutant <ccoutant@google.com> 2008-08-07 17:02:11 +00:00
merge.cc Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
merge.h Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
mremap.c * ffsll.c: New file. 2009-03-28 05:22:30 +00:00
object.cc PR 10670 2009-12-30 20:23:29 +00:00
object.h Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
options.cc PR 10861 2009-12-30 22:35:49 +00:00
options.h PR 10980 2009-12-31 06:05:49 +00:00
output.cc PR 10450 2009-12-30 19:29:20 +00:00
output.h * layout.cc (Layout::Layout): Initialize increase_relro_. 2009-12-30 06:57:17 +00:00
parameters.cc Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
parameters.h * object.h (class Object): Remove target_ field, and target, 2009-09-30 22:21:13 +00:00
plugin.cc Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
plugin.h * plugin.h (Plugin::Plugin): Initialize cleanup_done_. 2009-10-28 18:07:25 +00:00
powerpc.cc * layout.cc (Layout::Layout): Initialize increase_relro_. 2009-12-30 06:57:17 +00:00
pread.c * pread.c: Include stdio.h. 2009-10-09 23:10:15 +00:00
readsyms.cc 2009-10-10 Chris Demetriou <cgd@google.com> 2009-10-10 07:39:04 +00:00
readsyms.h * readsyms.cc (Read_symbols::incompatible_warning): New function. 2009-03-14 05:56:46 +00:00
reduced_debug_output.cc Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
reduced_debug_output.h Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
reloc-types.h * copy-relocs.cc: New file. 2008-04-16 22:54:29 +00:00
reloc.cc Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
reloc.h Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
resolve.cc * symtab.h (class Symbol_table): Add enum Defined. 2009-12-29 00:31:48 +00:00
script-c.h 2009-10-16 Doug Kwan <dougkwan@google.com> 2009-10-16 18:56:07 +00:00
script-sections.cc * symtab.h (class Symbol_table): Add enum Defined. 2009-12-29 00:31:48 +00:00
script-sections.h 2009-10-16 Doug Kwan <dougkwan@google.com> 2009-10-16 18:56:07 +00:00
script.cc PR 10979 2009-12-31 03:48:46 +00:00
script.h PR 10861 2009-12-30 22:35:49 +00:00
sparc.cc * layout.cc (Layout::Layout): Initialize increase_relro_. 2009-12-30 06:57:17 +00:00
stringpool.cc 2009-10-21 Doug Kwan <dougkwan@google.com> 2009-10-21 08:08:41 +00:00
stringpool.h PR 10133 2009-06-23 07:04:10 +00:00
symtab.cc PR 10916 2009-12-31 01:14:34 +00:00
symtab.h PR 10979 2009-12-31 05:07:22 +00:00
target-reloc.h PR 10843 2009-12-30 20:35:52 +00:00
target-select.cc Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
target-select.h Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
target.cc 2009-10-09 Doug Kwan <dougkwan@google.com> 2009-10-09 23:18:19 +00:00
target.h 2009-12-05 Doug Kwan <dougkwan@google.com> 2009-12-06 02:49:46 +00:00
timer.cc 2009-12-17 Rafael Avila de Espindola <espindola@google.com> 2009-12-17 16:02:03 +00:00
timer.h 2009-12-17 Rafael Avila de Espindola <espindola@google.com> 2009-12-17 16:02:03 +00:00
tls.h Update copyright years. Update language files. 2008-03-13 21:04:21 +00:00
token.h Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
version.cc * version.cc (version_string): Bump to 1.8. 2009-01-28 20:18:11 +00:00
workqueue-internal.h Update copyright years. Update language files. 2008-03-13 21:04:21 +00:00
workqueue-threads.cc Update copyright years. Update language files. 2008-03-13 21:04:21 +00:00
workqueue.cc 2009-12-29 Rafael Espindola <espindola@google.com> 2009-12-29 23:45:10 +00:00
workqueue.h Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
x86_64.cc PR 10450 2009-12-30 07:22:06 +00:00
yyscript.y 2009-10-16 Doug Kwan <dougkwan@google.com> 2009-10-16 18:56:07 +00:00

README

gold is an ELF linker.  It is intended to have complete support for
ELF and to run as fast as possible on modern systems.  For normal use
it is a drop-in replacement for the older GNU linker.

gold is part of the GNU binutils.  See ../binutils/README for more
general notes, including where to send bug reports.

gold was originally developed at Google, and was contributed to the
Free Software Foundation in March 2008.  At Google it was designed by
Ian Lance Taylor, with major contributions by Cary Coutant, Craig
Silverstein, and Andrew Chatham.

The existing GNU linker manual is intended to be accurate
documentation for features which gold supports.  gold supports most of
the features of the GNU linker for ELF targets.  Notable
omissions--features of the GNU linker not currently supported in
gold--are:
  * MEMORY regions in linker scripts
  * MRI compatible linker scripts
  * cross-reference reports (--cref)
  * various other minor options


Notes on the code
=================

These are some notes which may be helpful to people working on the
source code of gold itself.

gold is written in C++.  It is a GNU program, and therefore follows
the GNU formatting standards as modified for C++.  Source documents in
order of decreasing precedence:
    http://www.gnu.org/prep/standards/
    http://gcc.gnu.org/onlinedocs/libstdc++/17_intro/C++STYLE
    http://www.zembu.com/eng/procs/c++style.html

The linker is intended to have complete support for cross-compilation,
while still supporting the normal case of native linking as fast as
possible.  In order to do this, many classes are actually templates
whose parameter is the ELF file class (e.g., 32 bits or 64 bits).  The
C++ code is the same, but we don't pay the execution time cost of
always using 64-bit integers if the target is 32 bits.  Many of these
class templates also have an endianness parameter: true for
big-endian, false for little-endian.

The linker is multi-threaded.  The Task class represents a single unit
of work.  Task objects are stored on a single Workqueue object.  Tasks
communicate via Task_token objects.  Task_token objects are only
manipulated while holding the master Workqueue lock.  Relatively few
mutexes are used.


Build requirements
==================

The gold source code uses templates heavily.  Building it requires a
recent version of g++.  g++ 4.0.3 is known to work.  g++ 3.2 and g++
3.4.3 are known to fail.

The linker script parser uses features which are only in newer
versions of bison.  bison 2.3 is known to work.  bison 1.26 is known
to fail.  If you are building gold from an official binutils release,
the bison output should already be included.