binutils-gdb/gold
Ian Lance Taylor 1b77ea505f * configure.ac: Check for declarations for cases where libiberty.h
checks HAVE_DECL_xxx.
	* configure, config.in: Rebuild.
2009-05-15 18:32:13 +00:00
..
po Add Spanish translation to gold. 2009-03-10 09:21:01 +00:00
testsuite * archive.cc (Archive::add_symbols): Check for a version attached 2009-03-18 05:09:52 +00:00
ChangeLog * configure.ac: Check for declarations for cases where libiberty.h 2009-05-15 18:32:13 +00:00
Makefile.am 2009-03-23 Ian Lance Taylor <iant@google.com> 2009-03-24 00:31:29 +00:00
Makefile.in * ffsll.c: New file. 2009-03-28 05:22:30 +00:00
NEWS * NEWS: New file. 2008-03-25 21:55:29 +00:00
README * README: --gc-sections and map files are now supported. Document 2009-02-28 18:08:30 +00:00
TODO * TODO: New file. 2008-04-03 00:33:37 +00:00
aclocal.m4 bfd/ 2008-04-23 16:11:47 +00:00
archive.cc * object.cc (is_elf_object): Define. 2009-03-24 18:42:10 +00:00
archive.h * readsyms.cc (Read_symbols::incompatible_warning): New function. 2009-03-14 05:56:46 +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 * mapfile.cc: New file. 2008-05-21 21:37:44 +00:00
common.h * mapfile.cc: New file. 2008-05-21 21:37:44 +00:00
compressed_output.cc * compressed_output.h (class Output_compressed_section): Use 2008-04-03 14:18:37 +00:00
compressed_output.h * compressed_output.h (class Output_compressed_section): Use 2008-04-03 14:18:37 +00:00
config.in * configure.ac: Check for declarations for cases where libiberty.h 2009-05-15 18:32:13 +00:00
configure * configure.ac: Check for declarations for cases where libiberty.h 2009-05-15 18:32:13 +00:00
configure.ac * configure.ac: Check for declarations for cases where libiberty.h 2009-05-15 18:32:13 +00:00
configure.tgt 2009-03-23 Ian Lance Taylor <iant@google.com> 2009-03-24 00:31:29 +00:00
copy-relocs.cc Handle output sections with more than 0x7fffffff bytes. 2008-07-10 23:01:20 +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 PR gold/5986 2008-03-26 23:36:46 +00:00
defstd.cc Fully implement the SECTIONS clause. 2008-02-04 05:43:05 +00:00
defstd.h Update copyright years. Update language files. 2008-03-13 21:04:21 +00:00
descriptors.cc 2009-03-23 Ian Lance Taylor <iant@google.com> 2009-03-24 04:50:32 +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 elfcpp/: 2008-05-28 20:48:16 +00:00
dwarf_reader.h elfcpp/: 2008-05-28 20:48:16 +00:00
dynobj.cc (From Rafael Espindola) 2009-02-13 19:04:45 +00:00
dynobj.h (From Rafael Espindola) 2009-02-13 19:04:45 +00:00
ehframe.cc PR 6048 2008-07-24 21:23:09 +00:00
ehframe.h * mapfile.cc: New file. 2008-05-21 21:37:44 +00:00
errors.cc 2009-03-23 Ian Lance Taylor <iant@google.com> 2009-03-24 04:50:32 +00:00
errors.h 2009-03-23 Ian Lance Taylor <iant@google.com> 2009-03-24 04:50:32 +00:00
expression.cc Permit scripts to refer to the addresses of output sections which were 2008-02-29 00:04:06 +00:00
ffsll.c * ffsll.c (ffsll): Correct implementation. 2009-03-30 23:17:11 +00:00
fileread.cc * readsyms.cc (Read_symbols::incompatible_warning): New function. 2009-03-14 05:56:46 +00:00
fileread.h * readsyms.cc (Read_symbols::incompatible_warning): New function. 2009-03-14 05:56:46 +00:00
freebsd.h 2009-03-23 Ian Lance Taylor <iant@google.com> 2009-03-24 00:31:29 +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 2009-01-20 Sriraman Tallam <tmsriram@google.com> 2009-01-28 02:25:33 +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 * readsyms.cc (Read_symbols::incompatible_warning): New function. 2009-03-14 05:56:46 +00:00
gold.h * gold.h (Incremental_argument_list): Remove (invalid) forward 2009-05-15 17:01:04 +00:00
i386.cc 2009-03-23 Ian Lance Taylor <iant@google.com> 2009-03-24 00:31:29 +00:00
incremental.cc * gold.h (Incremental_argument_list): Remove (invalid) forward 2009-05-15 17:01:04 +00:00
incremental.h * gold.h (Incremental_argument_list): Remove (invalid) forward 2009-05-15 17:01:04 +00:00
layout.cc * incremental.cc (Incremental_inputs_header_data): Renamed from 2009-04-24 15:44:02 +00:00
layout.h * incremental.cc (Incremental_inputs_header_data): Renamed from 2009-04-24 15:44:02 +00:00
main.cc * gold.h (Incremental_argument_list): Remove (invalid) forward 2009-05-15 17:01:04 +00:00
mapfile.cc * mapfile.cc (Mapfile::print_input_section): Change -1U to -1ULL. 2008-09-29 21:10:26 +00:00
mapfile.h 2008-08-06 Cary Coutant <ccoutant@google.com> 2008-08-07 17:02:11 +00:00
merge.cc * merge.cc (do_add_input_section): Correct pend value. Change 2009-03-23 21:15:08 +00:00
merge.h Handle output sections with more than 0x7fffffff bytes. 2008-07-10 23:01:20 +00:00
mremap.c * ffsll.c: New file. 2009-03-28 05:22:30 +00:00
object.cc * object.cc (is_elf_object): Define. 2009-03-24 18:42:10 +00:00
object.h * object.cc (is_elf_object): Define. 2009-03-24 18:42:10 +00:00
options.cc * options.cc (parse_short_option): Keep dash_z from registering itself. 2009-03-06 23:12:37 +00:00
options.h * gold.h (Incremental_argument_list): Remove (invalid) forward 2009-05-15 17:01:04 +00:00
output.cc 2008-04-23 Elliott Hughes <enh@google.com> 2009-04-24 19:48:21 +00:00
output.h * output.cc (Output_file::map_anonymous): Define. 2009-03-24 18:04:26 +00:00
parameters.cc 2009-03-23 Ian Lance Taylor <iant@google.com> 2009-03-24 00:31:29 +00:00
parameters.h * readsyms.cc (Read_symbols::incompatible_warning): New function. 2009-03-14 05:56:46 +00:00
plugin.cc * gold.h (Incremental_argument_list): Remove (invalid) forward 2009-05-15 17:01:04 +00:00
plugin.h (From Rafael Espindola) 2009-02-13 19:04:45 +00:00
powerpc.cc * powerpc.cc (Target_powerpc::check_non_pic): Assert that output is 2009-03-27 18:19:09 +00:00
pread.c * ffsll.c: New file. 2009-03-28 05:22:30 +00:00
readsyms.cc * gold.h (Incremental_argument_list): Remove (invalid) forward 2009-05-15 17:01:04 +00:00
readsyms.h * readsyms.cc (Read_symbols::incompatible_warning): New function. 2009-03-14 05:56:46 +00:00
reduced_debug_output.cc * gold.h: Include <cstring> and <stdint.h>. 2009-01-28 20:09:18 +00:00
reduced_debug_output.h PR 9812 2009-02-04 15:18:51 +00:00
reloc-types.h * copy-relocs.cc: New file. 2008-04-16 22:54:29 +00:00
reloc.cc PR 9918 2009-03-04 06:46:27 +00:00
reloc.h 2009-01-20 Sriraman Tallam <tmsriram@google.com> 2009-01-28 02:25:33 +00:00
resolve.cc PR 9836 2009-02-27 19:57:46 +00:00
script-c.h * yyscript.y (file_cmd): Recognize EXTERN. 2009-03-24 19:08:37 +00:00
script-sections.cc * script-sections.h: Include <list>. 2009-03-19 05:51:49 +00:00
script-sections.h * script-sections.h: Include <list>. 2009-03-19 05:51:49 +00:00
script.cc * gold.h (Incremental_argument_list): Remove (invalid) forward 2009-05-15 17:01:04 +00:00
script.h * gold.h (Incremental_argument_list): Remove (invalid) forward 2009-05-15 17:01:04 +00:00
sparc.cc * powerpc.cc (Target_powerpc::check_non_pic): Assert that output is 2009-03-27 18:19:09 +00:00
stringpool.cc * stringpool.cc (Stringpool_template::add_with_length): Set key to 2008-07-24 07:23:20 +00:00
stringpool.h * stringpool.cc (Stringpool_template::add_with_length): Set key to 2008-07-24 07:23:20 +00:00
symtab.cc * symtab.cc (Symbol_table::define_default_version): New function, 2009-03-17 07:07:21 +00:00
symtab.h * symtab.h (needs_plt_entry): Check for unsatisfied reference from 2009-03-25 01:34:25 +00:00
target-reloc.h PR 9918 2009-03-04 06:46:27 +00:00
target-select.cc * target-select.cc (instantiate_target): Don't acquire the lock if 2009-03-24 17:32:43 +00:00
target-select.h 2009-03-23 Ian Lance Taylor <iant@google.com> 2009-03-24 04:50:32 +00:00
target.h 2009-03-23 Ian Lance Taylor <iant@google.com> 2009-03-24 00:31:29 +00:00
tls.h Update copyright years. Update language files. 2008-03-13 21:04:21 +00:00
token.h Update copyright years. Update language files. 2008-03-13 21:04:21 +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 * readsyms.cc (Read_symbols::incompatible_warning): New function. 2009-03-14 05:56:46 +00:00
workqueue.h * readsyms.cc (Read_symbols::incompatible_warning): New function. 2009-03-14 05:56:46 +00:00
x86_64.cc * x86_64.cc (do_adjust_output_section): Set entsize to 2009-04-27 16:23:57 +00:00
yyscript.y * yyscript.y (file_cmd): Recognize EXTERN. 2009-03-24 19:08:37 +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)
  * position independent executables (-pie)
  * 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.