binutils-gdb/gold
Tulio Magno Quites Machado Filho f6f9ed015e Fix "may be used uninitialized" warning.
* object.cc (Sized_relobj_file::map_to_kept_section): Initialize
	kept_file.
2018-08-07 22:40:33 -07:00
..
po Updated French translation for gold and Spanish translation for ld. 2018-07-18 08:37:38 +01:00
testsuite Fix internal error when using --emit-relocs with plugins. 2018-07-14 12:44:48 -07:00
ChangeLog Fix "may be used uninitialized" warning. 2018-08-07 22:40:33 -07:00
ChangeLog-0815 binutils ChangeLog rotation 2016-01-01 22:59:17 +10:30
ChangeLog-2016 ChangeLog rotation 2017-01-02 13:55:05 +10:30
ChangeLog-2017 ChangeLog rotation 2018-01-03 17:49:42 +10:30
Makefile.am Replace thread config with automatic config using ax_pthread.m4. 2018-06-19 18:57:28 -07:00
Makefile.in Replace thread config with automatic config using ax_pthread.m4. 2018-06-19 18:57:28 -07:00
NEWS Bump version number and summarize new features in 1.16. 2018-06-23 00:46:13 -07:00
README Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
TODO
aarch64-reloc-property.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
aarch64-reloc-property.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
aarch64-reloc.def Add support for R_AARCH64_TLSLE_LDST8_TPREL_LO12, etc. 2018-03-28 09:10:25 -07:00
aarch64.cc Fix _GLOBAL_OFFSET_TABLE_ value for large GOTs (aarch64). 2018-05-10 00:13:33 -07:00
aclocal.m4 Replace thread config with automatic config using ax_pthread.m4. 2018-06-19 18:57:28 -07:00
archive.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
archive.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
arm-reloc-property.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
arm-reloc-property.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
arm-reloc.def Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
arm.cc Further improve warnings for relocations referring to discarded sections. 2018-04-06 22:50:14 -07:00
attributes.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
attributes.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
binary.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
binary.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
common.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
common.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
compressed_output.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
compressed_output.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
config.in Replace thread config with automatic config using ax_pthread.m4. 2018-06-19 18:57:28 -07:00
configure Replace thread config with automatic config using ax_pthread.m4. 2018-06-19 18:57:28 -07:00
configure.ac Replace thread config with automatic config using ax_pthread.m4. 2018-06-19 18:57:28 -07:00
configure.tgt Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
copy-relocs.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
copy-relocs.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
cref.cc Apply: 2018-01-12 11:05:58 -08:00
cref.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
debug.h Add --debug=plugin option to record plugin actions. 2018-03-23 10:05:38 -07:00
defstd.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
defstd.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
descriptors.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
descriptors.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
dirsearch.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
dirsearch.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
dwarf_reader.cc Add support for DWARF-4 line number tables. 2018-02-02 17:44:27 -08:00
dwarf_reader.h Add support for DWARF-4 line number tables. 2018-02-02 17:44:27 -08:00
dwp.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
dwp.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
dynobj.cc Fix problem where gold does not create base version for executables. 2018-06-20 01:25:04 -07:00
dynobj.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
ehframe.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
ehframe.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
errors.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
errors.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
expression.cc Fix symbol resolution with linker plugins for defsym symbols. 2018-02-15 17:35:16 -08:00
ffsll.c Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
fileread.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
fileread.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
freebsd.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
ftruncate.c Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
gc.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
gc.h Fix bug with relocation addends and merge sections with --icf. 2018-04-24 22:13:56 -07:00
gdb-index.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
gdb-index.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
gold-threads.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
gold-threads.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
gold.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
gold.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
i386.cc Fix problem where mixed section types can cause internal error during a -r link. 2018-04-02 19:07:04 -07:00
icf.cc Fix bug with relocation addends and merge sections with --icf. 2018-04-24 22:13:56 -07:00
icf.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
incremental-dump.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
incremental.cc Fix test for availability of emplace_back. 2018-07-09 16:12:27 -07:00
incremental.h Silence GCC 9 error about deprecated implicit copy constructor. 2018-06-22 18:19:51 -07:00
int_encoding.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
int_encoding.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
layout.cc Combine ,gnu.build.attributes.* sections into one .gnu.build.attributes section during linking. 2018-07-30 09:34:40 +01:00
layout.h Update support for .note.gnu.property sections. 2018-06-22 23:36:50 -07:00
main.cc Fix printing the size of GOLD's memory areana on Cygwin based systems. 2018-07-11 08:39:36 -07:00
mapfile.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
mapfile.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
merge.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
merge.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
mips.cc Revert previous patch and apply revised patch. 2018-04-05 09:45:07 -07:00
mremap.c Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
nacl.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
nacl.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
object.cc Fix "may be used uninitialized" warning. 2018-08-07 22:40:33 -07:00
object.h Add support for .note.gnu.property sections. 2018-06-22 09:52:00 -07:00
options.cc Use top-level config support for enabling plugins. 2018-03-28 14:02:41 -07:00
options.h Add --warn-drop-version option; by default, do not warn when discarding version info. 2018-08-06 14:10:13 -07:00
output.cc Fix problem where mixed section types can cause internal error during a -r link. 2018-04-02 19:07:04 -07:00
output.h Fix problem where mixed section types can cause internal error during a -r link. 2018-04-02 19:07:04 -07:00
parameters.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
parameters.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
plugin.cc Fix case where IR file provides symbol visibility but replacement file does not. 2018-03-26 10:54:45 -07:00
plugin.h Add --debug=plugin option to record plugin actions. 2018-03-23 10:05:38 -07:00
powerpc.cc [GOLD] PowerPC .gnu.attributes support 2018-07-06 15:18:51 +09:30
pread.c Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
readsyms.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
readsyms.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
reduced_debug_output.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
reduced_debug_output.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
reloc-types.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
reloc.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
reloc.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
resolve.cc Fix treatment of symbol versions with unused as-needed libraries. 2018-06-21 13:54:16 -07:00
s390.cc Fix problem where mixed section types can cause internal error during a -r link. 2018-04-02 19:07:04 -07:00
script-c.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
script-sections.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
script-sections.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
script.cc Fix symbol resolution with linker plugins for defsym symbols. 2018-02-15 17:35:16 -08:00
script.h Fix symbol resolution with linker plugins for defsym symbols. 2018-02-15 17:35:16 -08:00
sparc.cc Fix problem where mixed section types can cause internal error during a -r link. 2018-04-02 19:07:04 -07:00
stringpool.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
stringpool.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
symtab.cc Add --warn-drop-version option; by default, do not warn when discarding version info. 2018-08-06 14:10:13 -07:00
symtab.h Fix internal error caused by conflicting default version definitions. 2018-04-24 13:51:24 -07:00
system.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
target-reloc.h Further improve warnings for relocations referring to discarded sections. 2018-04-06 22:50:14 -07:00
target-select.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
target-select.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
target.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
target.h Fix type checking errors. 2018-08-06 13:36:42 -07:00
tilegx.cc Fix problem where mixed section types can cause internal error during a -r link. 2018-04-02 19:07:04 -07:00
timer.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
timer.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
tls.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
token.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
version.cc Bump version number and summarize new features in 1.16. 2018-06-23 00:46:13 -07:00
workqueue-internal.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
workqueue-threads.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
workqueue.cc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
workqueue.h Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
x86_64.cc Properly merge GNU_PROPERTY_X86_ISA_1_USED (x86_64). 2018-08-07 21:35:41 -07:00
yyscript.y Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30

README

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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:
  * 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++/manual/source_code_style.html
    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 and 4.1.3 are known to work.  g++
3.2, 3.4.3, and 4.1.2 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.


Copyright (C) 2012-2018 Free Software Foundation, Inc.

Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
notice and this notice are preserved.