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Alan Modra 7824c1d22f Weak references to __start_/__stop_ symbols
If a weak reference to a __start_foo or __stop_foo symbol ends up
having no definition due to all the foo sections being removed for
some reason, undef_start_stop currently makes the symbol strong
undefined.  That risks a linker undefined symbol error.  Fix that by
making the symbol undefweak and also undo some dynamic symbol state.

Note that saving the state of the symbol type at the time
lang_init_start_stop runs is not sufficient.  The linker may have
merged in a shared library reference by that point and made what was
an undefweak in regular objects, a strong undefined.  So it is
necessary to look at the ELF symbol flags to decide whether an
undefweak is the proper resolution.

Something probably should be done for COFF/PE too, but I'm unsure how
to do go about that.

	* ldlang.c (undef_start_stop): For ELF make undefined start/stop
	symbols undefweak if that was how they were referenced.  Undo
	dynamic state too.
2021-03-01 14:26:39 +10:30
bfd Automatic date update in version.in 2021-03-01 00:00:19 +00:00
binutils PR27128, nm -P portable output format regression 2021-03-01 14:26:39 +10:30
config config/debuginfod: do not include pkg.m4 directly 2021-02-13 00:15:11 -05:00
contrib
cpu Add Changelog entries and NEWS entries for 2.36 branch 2021-01-09 10:40:28 +00:00
elfcpp Add Changelog entries and NEWS entries for 2.36 branch 2021-01-09 10:40:28 +00:00
etc Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
gas Correct an error message in the ARM assembler. 2021-02-26 16:37:30 +00:00
gdb [PR gdb/27393] set directories: handle empty dirs. 2021-02-27 14:29:39 +00:00
gdbserver gdbserver: linux-low: make linux_process_target::filter_event return void 2021-02-23 10:56:56 -05:00
gdbsupport gnulib: update to 776af40e0 2021-02-05 13:35:20 -05:00
gnulib gnulib: update to 776af40e0 2021-02-05 13:35:20 -05:00
gold gold: Skip address size and segment selector for DWARF5 2021-01-28 04:21:31 -08:00
gprof Regen Makefile.in for jobserver.m4 aclocal.m4 dependency 2021-01-13 22:06:02 +10:30
include Warn when a script redefines a symbol 2021-02-21 14:28:16 +10:30
intl intl: turn LIBINTL into -L / -l form 2021-02-10 15:26:57 +00:00
ld Weak references to __start_/__stop_ symbols 2021-03-01 14:26:39 +10:30
libctf libctf regen for NEWS 2021-02-26 13:29:01 +10:30
libdecnumber
libiberty GCC: Check if AR works with --plugin and rc 2021-01-11 16:26:51 -08:00
opcodes RISC-V: PR27158, fixed UJ/SB types and added CSS/CL/CS types for .insn. 2021-02-19 11:44:49 +08:00
readline Use readline's variant of Windows patch 2021-01-23 09:24:20 -07:00
sim sim: igen: drop config.h & header checking 2021-02-28 03:32:47 -05:00
texinfo
zlib GCC: Check if AR works with --plugin and rc 2021-01-11 16:26:51 -08:00
.cvsignore
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ar-lib
ChangeLog Add missing changes to Makefile.tpl 2021-02-28 04:39:38 -08:00
compile
config-ml.in
config.guess Update config.sub and config.guess 2021-01-05 15:55:59 +10:30
config.rpath
config.sub config.sub update broke powerpc-eabivle 2021-01-07 08:56:28 +10:30
configure Remove arm-symbianelf 2021-02-09 23:36:16 +10:30
configure.ac Remove arm-symbianelf 2021-02-09 23:36:16 +10:30
COPYING
COPYING3
COPYING3.LIB
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depcomp
djunpack.bat
install-sh
libtool.m4 GCC: Check if AR works with --plugin and rc 2021-01-11 16:26:51 -08:00
lt~obsolete.m4
ltgcc.m4
ltmain.sh
ltoptions.m4
ltsugar.m4
ltversion.m4
MAINTAINERS
Makefile.def ld: depend on libctf 2021-01-27 11:04:12 +00:00
Makefile.in ld: depend on libctf 2021-01-27 11:04:12 +00:00
Makefile.tpl Add missing changes to Makefile.tpl 2021-02-28 04:39:38 -08:00
makefile.vms
missing
mkdep
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multilib.am
README
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setup.com
src-release.sh src-release: fix indentation 2021-01-12 18:19:20 -05:00
symlink-tree
test-driver
ylwrap

		   README for GNU development tools

This directory contains various GNU compilers, assemblers, linkers, 
debuggers, etc., plus their support routines, definitions, and documentation.

If you are receiving this as part of a GDB release, see the file gdb/README.
If with a binutils release, see binutils/README;  if with a libg++ release,
see libg++/README, etc.  That'll give you info about this
package -- supported targets, how to use it, how to report bugs, etc.

It is now possible to automatically configure and build a variety of
tools with one command.  To build all of the tools contained herein,
run the ``configure'' script here, e.g.:

	./configure 
	make

To install them (by default in /usr/local/bin, /usr/local/lib, etc),
then do:
	make install

(If the configure script can't determine your type of computer, give it
the name as an argument, for instance ``./configure sun4''.  You can
use the script ``config.sub'' to test whether a name is recognized; if
it is, config.sub translates it to a triplet specifying CPU, vendor,
and OS.)

If you have more than one compiler on your system, it is often best to
explicitly set CC in the environment before running configure, and to
also set CC when running make.  For example (assuming sh/bash/ksh):

	CC=gcc ./configure
	make

A similar example using csh:

	setenv CC gcc
	./configure
	make

Much of the code and documentation enclosed is copyright by
the Free Software Foundation, Inc.  See the file COPYING or
COPYING.LIB in the various directories, for a description of the
GNU General Public License terms under which you can copy the files.

REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info
on where and how to report problems.