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H.J. Lu a4819f54c0 Treat common symbol as undefined for --no-define-common 
When --no-define-common is used to build shared library, treat common
symbol as undefined so that common symbols that are referenced from a
shared library to be assigned addresses only in the main program.  This
eliminates the unused duplicate space in the shared library, and also
prevents any possible confusion over resolving to the wrong duplicate
when there are many dynamic modules with specialized search paths for
runtime symbol resolution.

--no-define-common is only allowed when building a shared library.

bfd/

	PR ld/21903:
	* elflink.c (elf_link_add_object_symbols): Treat common symbol
	as undefined for --no-define-common.

include/

	PR ld/21903:
	* bfdlink.h (bfd_link_info): Add inhibit_common_definition.

ld/

	PR ld/21903:
	* ld.h (command_line): Remove inhibit_common_definition.
	* ldgram.y: Replace command_line.inhibit_common_definition with
	link_info.inhibit_common_definition.
	* ldlang.c (lang_common): Likewise.
	* lexsup.c (parse_args): Likewise.
	* ldmain.c (main): Only allow --no-define-common with -shared.
	* testsuite/ld-elf/pr21903.s: New file.
	* testsuite/ld-elf/pr21903a.d: Likewise.
	* testsuite/ld-elf/pr21903b.d: Likewise.
	* testsuite/ld-elf/pr21903c.d: Likewise.
	* testsuite/ld-elf/pr21903d.d: Likewise.
	* testsuite/ld-elf/pr21903e.d: Likewise.
 		2017-08-06 08:19:04 -07:00
..
aout Fix spelling typos. 2017-07-18 16:58:14 +01:00
cgen Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
coff Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
elf [ARC] Add JLI support. 2017-07-19 09:56:55 +02:00
gdb Fix spelling typos. 2017-07-18 16:58:14 +01:00
mach-o Fix spelling typos. 2017-07-18 16:58:14 +01:00
nlm Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
opcode [ARC] Add SJLI instruction. 2017-07-19 09:56:55 +02:00
som Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
vms Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
COPYING Update the address and phone number of the FSF organization 2005-05-10 10:21:13 +00:00
COPYING3 * COPYING3: New file. Contains version 3 of the GNU General Public License. 2007-07-17 13:50:23 +00:00
ChangeLog Treat common symbol as undefined for --no-define-common 2017-08-06 08:19:04 -07:00
ChangeLog-0415 binutils ChangeLog rotation 2016-01-01 22:59:17 +10:30
ChangeLog-2016 ChangeLog rotation 2017-01-02 13:55:05 +10:30
ChangeLog-9103 Add copyright notices 2012-12-10 12:48:03 +00:00
MAINTAINERS Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
alloca-conf.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
ansidecl.h Fix compile time error when using ansidecl.h with an old version of GCC. 2017-07-31 15:08:32 +01:00
bfdlink.h Treat common symbol as undefined for --no-define-common 2017-08-06 08:19:04 -07:00
binary-io.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
bout.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
demangle.h Sync libiberty sources with GCC. 2017-03-13 17:49:32 +00:00
dis-asm.h binutils/objdump: Fix disassemble for huge elf sections 2017-07-14 22:51:01 +09:30
dwarf2.def Import include/+libiberty/ r249883 from upstream GCC. 2017-07-02 22:09:52 +02:00
dwarf2.h Import include/+libiberty/ r249883 from upstream GCC. 2017-07-02 22:09:52 +02:00
dyn-string.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
environ.h Fix MinGW compilation warnings due to environ.h 2017-05-31 09:35:07 +03:00
fibheap.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
filenames.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
floatformat.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
fnmatch.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
fopen-bin.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
fopen-same.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
fopen-vms.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
gcc-c-fe.def Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
gcc-c-interface.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
gcc-interface.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
getopt.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
hashtab.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
hp-symtab.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
ieee.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
leb128.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
libiberty.h Fix spelling typos. 2017-07-18 16:58:14 +01:00
longlong.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
lto-symtab.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
md5.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
oasys.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
objalloc.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
obstack.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
os9k.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
partition.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
plugin-api.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
progress.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
safe-ctype.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
sha1.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
simple-object.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
sort.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
splay-tree.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
symcat.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
timeval-utils.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
vtv-change-permission.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
xregex.h merge from gcc 2011-07-25 17:11:48 +00:00
xregex2.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
xtensa-config.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
xtensa-isa-internal.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
xtensa-isa.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30