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17167ab951
binutils/binutils-2.20.51.0.2-add-needed.patch
Nicholas Clifton 8d40e3a0e8 Fix --no-copy-dt-needed so that it does not complain about weak references. 
Fix --no-copy-dt-needed so that it reports the correct input file which
    needs a DSO.
2010-01-20 09:48:52 +00:00

431 lines
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diff -rup ../binutils-2.20.51.0.2/bfd/elflink.c ./bfd/elflink.c
--- ../binutils-2.20.51.0.2/bfd/elflink.c 2010-01-20 08:27:19.000000000 +0000
+++ ./bfd/elflink.c 2010-01-20 08:35:12.000000000 +0000
@@ -3918,6 +3918,7 @@ error_free_dyn:
bfd_boolean common;
unsigned int old_alignment;
bfd *old_bfd;
+ bfd * undef_bfd = NULL;
override = FALSE;
@@ -4042,6 +4043,20 @@ error_free_dyn:
unsigned int vernum = 0;
bfd_boolean skip;
+ /* If this is a definition of a symbol which was previously
+ referenced in a non-weak manner then make a note of the bfd
+ that contained the reference. This is used if we need to
+ refer to the source of the reference later on. */
+ if (! bfd_is_und_section (sec))
+ {
+ h = elf_link_hash_lookup (elf_hash_table (info), name, FALSE, FALSE, FALSE);
+
+ if (h != NULL
+ && h->root.type == bfd_link_hash_undefined
+ && h->root.u.undef.abfd)
+ undef_bfd = h->root.u.undef.abfd;
+ }
+
if (ever == NULL)
{
if (info->default_imported_symver)
@@ -4149,6 +4164,19 @@ error_free_dyn:
name = newname;
}
+ /* If necessary, make a second attempt to locate the bfd
+ containing an unresolved, non-weak reference to the
+ current symbol. */
+ if (! bfd_is_und_section (sec) && undef_bfd == NULL)
+ {
+ h = elf_link_hash_lookup (elf_hash_table (info), name, FALSE, FALSE, FALSE);
+
+ if (h != NULL
+ && h->root.type == bfd_link_hash_undefined
+ && h->root.u.undef.abfd)
+ undef_bfd = h->root.u.undef.abfd;
+ }
+
if (!_bfd_elf_merge_symbol (abfd, info, name, isym, &sec,
&value, &old_alignment,
sym_hash, &skip, &override,
@@ -4502,13 +4530,18 @@ error_free_dyn:
/* A symbol from a library loaded via DT_NEEDED of some
other library is referenced by a regular object.
Add a DT_NEEDED entry for it. Issue an error if
- --no-add-needed is used. */
- if ((elf_dyn_lib_class (abfd) & DYN_NO_NEEDED) != 0)
+ --no-add-needed is used and the reference was not
+ a weak one. */
+ if (undef_bfd != NULL
+ && (elf_dyn_lib_class (abfd) & DYN_NO_NEEDED) != 0)
{
(*_bfd_error_handler)
- (_("%s: invalid DSO for symbol `%s' definition"),
+ (_("%B: undefined reference to symbol '%s'"),
+ undef_bfd, name);
+ (*_bfd_error_handler)
+ (_("note: '%s' is defined in DSO %B so try adding it to the linker command line"),
abfd, name);
- bfd_set_error (bfd_error_bad_value);
+ bfd_set_error (bfd_error_invalid_operation);
goto error_free_vers;
}
diff -rup ../binutils-2.20.51.0.2/ld/emultempl/elf32.em ./ld/emultempl/elf32.em
--- ../binutils-2.20.51.0.2/ld/emultempl/elf32.em 2009-10-09 23:26:22.000000000 +0100
+++ ./ld/emultempl/elf32.em 2010-01-13 16:01:13.000000000 +0000
@@ -110,7 +110,7 @@ fi
if test x"$LDEMUL_RECOGNIZED_FILE" != xgld"${EMULATION_NAME}"_load_symbols; then
fragment <<EOF
-/* Handle as_needed DT_NEEDED. */
+/* Handle the generation of DT_NEEDED tags. */
static bfd_boolean
gld${EMULATION_NAME}_load_symbols (lang_input_statement_type *entry)
@@ -120,13 +120,13 @@ gld${EMULATION_NAME}_load_symbols (lang_
/* Tell the ELF linker that we don't want the output file to have a
DT_NEEDED entry for this file, unless it is used to resolve
references in a regular object. */
- if (entry->as_needed)
+ if (entry->add_DT_NEEDED_for_regular)
link_class = DYN_AS_NEEDED;
/* Tell the ELF linker that we don't want the output file to have a
DT_NEEDED entry for any dynamic library in DT_NEEDED tags from
this file at all. */
- if (!entry->add_needed)
+ if (!entry->add_DT_NEEDED_for_dynamic)
link_class |= DYN_NO_ADD_NEEDED;
if (entry->just_syms_flag
@@ -134,7 +134,7 @@ gld${EMULATION_NAME}_load_symbols (lang_
einfo (_("%P%F: --just-symbols may not be used on DSO: %B\n"),
entry->the_bfd);
- if (!link_class
+ if (link_class == 0
|| (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) == 0)
return FALSE;
diff -rup ../binutils-2.20.51.0.2/ld/ldgram.y ./ld/ldgram.y
--- ../binutils-2.20.51.0.2/ld/ldgram.y 2009-09-08 18:11:39.000000000 +0100
+++ ./ld/ldgram.y 2010-01-13 16:01:16.000000000 +0000
@@ -378,17 +378,17 @@ input_list:
{ lang_add_input_file($2,lang_input_file_is_l_enum,
(char *)NULL); }
| AS_NEEDED '('
- { $<integer>$ = as_needed; as_needed = TRUE; }
+ { $<integer>$ = add_DT_NEEDED_for_regular; add_DT_NEEDED_for_regular = TRUE; }
input_list ')'
- { as_needed = $<integer>3; }
+ { add_DT_NEEDED_for_regular = $<integer>3; }
| input_list ',' AS_NEEDED '('
- { $<integer>$ = as_needed; as_needed = TRUE; }
+ { $<integer>$ = add_DT_NEEDED_for_regular; add_DT_NEEDED_for_regular = TRUE; }
input_list ')'
- { as_needed = $<integer>5; }
+ { add_DT_NEEDED_for_regular = $<integer>5; }
| input_list AS_NEEDED '('
- { $<integer>$ = as_needed; as_needed = TRUE; }
+ { $<integer>$ = add_DT_NEEDED_for_regular; add_DT_NEEDED_for_regular = TRUE; }
input_list ')'
- { as_needed = $<integer>4; }
+ { add_DT_NEEDED_for_regular = $<integer>4; }
;
sections:
diff -rup ../binutils-2.20.51.0.2/ld/ldlang.c ./ld/ldlang.c
--- ../binutils-2.20.51.0.2/ld/ldlang.c 2009-10-09 23:25:30.000000000 +0100
+++ ./ld/ldlang.c 2010-01-13 16:01:16.000000000 +0000
@@ -1056,8 +1056,8 @@ new_afile (const char *name,
p->next_real_file = NULL;
p->next = NULL;
p->dynamic = config.dynamic_link;
- p->add_needed = add_needed;
- p->as_needed = as_needed;
+ p->add_DT_NEEDED_for_dynamic = add_DT_NEEDED_for_dynamic;
+ p->add_DT_NEEDED_for_regular = add_DT_NEEDED_for_regular;
p->whole_archive = whole_archive;
p->loaded = FALSE;
lang_statement_append (&input_file_chain,
@@ -2592,7 +2592,8 @@ load_symbols (lang_input_statement_type
{
bfd_error_type err;
bfd_boolean save_ldlang_sysrooted_script;
- bfd_boolean save_as_needed, save_add_needed;
+ bfd_boolean save_add_DT_NEEDED_for_regular;
+ bfd_boolean save_add_DT_NEEDED_for_dynamic;
err = bfd_get_error ();
@@ -2623,10 +2624,10 @@ load_symbols (lang_input_statement_type
push_stat_ptr (place);
save_ldlang_sysrooted_script = ldlang_sysrooted_script;
ldlang_sysrooted_script = entry->sysrooted;
- save_as_needed = as_needed;
- as_needed = entry->as_needed;
- save_add_needed = add_needed;
- add_needed = entry->add_needed;
+ save_add_DT_NEEDED_for_regular = add_DT_NEEDED_for_regular;
+ add_DT_NEEDED_for_regular = entry->add_DT_NEEDED_for_regular;
+ save_add_DT_NEEDED_for_dynamic = add_DT_NEEDED_for_dynamic;
+ add_DT_NEEDED_for_dynamic = entry->add_DT_NEEDED_for_dynamic;
ldfile_assumed_script = TRUE;
parser_input = input_script;
@@ -2637,8 +2638,8 @@ load_symbols (lang_input_statement_type
ldfile_assumed_script = FALSE;
ldlang_sysrooted_script = save_ldlang_sysrooted_script;
- as_needed = save_as_needed;
- add_needed = save_add_needed;
+ add_DT_NEEDED_for_regular = save_add_DT_NEEDED_for_regular;
+ add_DT_NEEDED_for_dynamic = save_add_DT_NEEDED_for_dynamic;
pop_stat_ptr ();
return TRUE;
diff -rup ../binutils-2.20.51.0.2/ld/ldlang.h ./ld/ldlang.h
--- ../binutils-2.20.51.0.2/ld/ldlang.h 2009-10-09 23:25:30.000000000 +0100
+++ ./ld/ldlang.h 2010-01-13 16:01:13.000000000 +0000
@@ -270,11 +270,11 @@ typedef struct lang_input_statement_stru
/* Whether DT_NEEDED tags should be added for dynamic libraries in
DT_NEEDED tags from this entry. */
- unsigned int add_needed : 1;
+ unsigned int add_DT_NEEDED_for_dynamic : 1;
/* Whether this entry should cause a DT_NEEDED tag only when
satisfying references from regular files, or always. */
- unsigned int as_needed : 1;
+ unsigned int add_DT_NEEDED_for_regular : 1;
/* Whether to include the entire contents of an archive. */
unsigned int whole_archive : 1;
diff -rup ../binutils-2.20.51.0.2/ld/ldmain.c ./ld/ldmain.c
--- ../binutils-2.20.51.0.2/ld/ldmain.c 2010-01-20 08:27:18.000000000 +0000
+++ ./ld/ldmain.c 2010-01-13 16:01:16.000000000 +0000
@@ -93,13 +93,14 @@ bfd_boolean version_printed;
/* Nonzero means link in every member of an archive. */
bfd_boolean whole_archive;
-/* Nonzero means create DT_NEEDED entries only if a dynamic library
- actually satisfies some reference in a regular object. */
-bfd_boolean as_needed;
-
-/* Nonzero means never create DT_NEEDED entries for dynamic libraries
- in DT_NEEDED tags. */
-bfd_boolean add_needed = TRUE;
+/* True means only create DT_NEEDED entries for dynamic libraries
+ if they actually satisfy some reference in a regular object. */
+bfd_boolean add_DT_NEEDED_for_regular;
+
+/* True means create DT_NEEDED entries for dynamic libraries that
+ are DT_NEEDED by dynamic libraries specifically mentioned on
+ the command line. */
+bfd_boolean add_DT_NEEDED_for_dynamic = TRUE;
/* TRUE if we should demangle symbol names. */
bfd_boolean demangling;
diff -rup ../binutils-2.20.51.0.2/ld/ldmain.h ./ld/ldmain.h
--- ../binutils-2.20.51.0.2/ld/ldmain.h 2009-10-09 23:26:22.000000000 +0100
+++ ./ld/ldmain.h 2010-01-13 16:01:12.000000000 +0000
@@ -1,6 +1,6 @@
/* ldmain.h -
Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1999, 2002, 2003, 2004,
- 2005, 2007, 2008 Free Software Foundation, Inc.
+ 2005, 2007, 2008, 2009 Free Software Foundation, Inc.
This file is part of the GNU Binutils.
@@ -34,8 +34,8 @@ extern bfd_boolean trace_files;
extern bfd_boolean trace_file_tries;
extern bfd_boolean version_printed;
extern bfd_boolean whole_archive;
-extern bfd_boolean as_needed;
-extern bfd_boolean add_needed;
+extern bfd_boolean add_DT_NEEDED_for_regular;
+extern bfd_boolean add_DT_NEEDED_for_dynamic;
extern bfd_boolean demangling;
extern enum report_method how_to_report_unresolved_symbols;
extern int g_switch_value;
diff -rup ../binutils-2.20.51.0.2/ld/ld.texinfo ./ld/ld.texinfo
--- ../binutils-2.20.51.0.2/ld/ld.texinfo 2010-01-20 08:27:18.000000000 +0000
+++ ./ld/ld.texinfo 2010-01-13 16:01:12.000000000 +0000
@@ -1132,27 +1132,24 @@ restore the old behaviour.
@item --as-needed
@itemx --no-as-needed
This option affects ELF DT_NEEDED tags for dynamic libraries mentioned
-on the command line after the @option{--as-needed} option. Normally,
+on the command line after the @option{--as-needed} option. Normally
the linker will add a DT_NEEDED tag for each dynamic library mentioned
on the command line, regardless of whether the library is actually
-needed. @option{--as-needed} causes a DT_NEEDED tag to only be emitted
-for a library that satisfies a symbol reference from regular objects
-which is undefined at the point that the library was linked, or, if
-the library is not found in the DT_NEEDED lists of other libraries
-linked up to that point, a reference from another dynamic library.
+needed or not. @option{--as-needed} causes a DT_NEEDED tag to only be
+emitted for a library that satisfies an undefined symbol reference
+from a regular object file or, if the library is not found in the
+DT_NEEDED lists of other libraries linked up to that point, an
+undefined symbol reference from another dynamic library.
@option{--no-as-needed} restores the default behaviour.
@kindex --add-needed
@kindex --no-add-needed
@item --add-needed
@itemx --no-add-needed
-This option affects the treatment of dynamic libraries from ELF
-DT_NEEDED tags in dynamic libraries mentioned on the command line after
-the @option{--no-add-needed} option. Normally, the linker will add
-a DT_NEEDED tag for each dynamic library from DT_NEEDED tags.
-@option{--no-add-needed} causes DT_NEEDED tags will never be emitted
-for those libraries from DT_NEEDED tags. @option{--add-needed} restores
-the default behaviour.
+These two options have been deprecated because of the similarity of
+their names to the @option{--as-needed} and @option{--no-as-needed}
+options. They have been replaced by @option{--copy-dt-needed-entries}
+and @option{--no-copy-dt-needed-entries}.
@kindex -assert @var{keyword}
@item -assert @var{keyword}
@@ -1253,6 +1250,29 @@ Section overlap is not usually checked f
force checking in that case by using the @option{--check-sections}
option.
+@kindex --copy-dt-needed-entries
+@kindex --no-copy-dt-needed-entries
+@item --copy-dt-needed-entries
+@itemx --no-copy-dt-needed-entries
+This option affects the treatment of dynamic libraries referred to
+by DT_NEEDED tags @emph{inside} ELF dynamic libraries mentioned on the
+command line. Normally the linker will add a DT_NEEDED tag to the
+output binary for each library mentioned in a DT_NEEDED tag in an
+input dynamic library. With @option{--no-copy-dt-needed-entries}
+specified on the command line however any dynamic libraries that
+follow it will have their DT_NEEDED entries ignored. The default
+behaviour can be restored with @option{--copy-dt-needed-entries}.
+
+This option also has an effect on the resolution of symbols in dynamic
+libraries. With the default setting dynamic libraries mentioned on
+the command line will be recursively searched, following their
+DT_NEEDED tags to other libraries, in order to resolve symbols
+required by the output binary. With
+@option{--no-copy-dt-needed-entries} specified however the searching
+of dynamic libraries that follow it will stop with the dynamic
+library itself. No DT_NEEDED links will be traversed to resolve
+symbols.
+
@cindex cross reference table
@kindex --cref
@item --cref
diff -rup ../binutils-2.20.51.0.2/ld/lexsup.c ./ld/lexsup.c
--- ../binutils-2.20.51.0.2/ld/lexsup.c 2009-10-09 23:26:22.000000000 +0100
+++ ./ld/lexsup.c 2010-01-13 16:01:15.000000000 +0000
@@ -125,10 +125,10 @@ enum option_values
OPTION_SPLIT_BY_RELOC,
OPTION_SPLIT_BY_FILE ,
OPTION_WHOLE_ARCHIVE,
- OPTION_ADD_NEEDED,
- OPTION_NO_ADD_NEEDED,
- OPTION_AS_NEEDED,
- OPTION_NO_AS_NEEDED,
+ OPTION_ADD_DT_NEEDED_FOR_DYNAMIC,
+ OPTION_NO_ADD_DT_NEEDED_FOR_DYNAMIC,
+ OPTION_ADD_DT_NEEDED_FOR_REGULAR,
+ OPTION_NO_ADD_DT_NEEDED_FOR_REGULAR,
OPTION_WRAP,
OPTION_FORCE_EXE_SUFFIX,
OPTION_GC_SECTIONS,
@@ -333,19 +333,22 @@ static const struct ld_option ld_options
OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH},
'\0', NULL, N_("Reject input files whose architecture is unknown"),
TWO_DASHES },
- { {"add-needed", no_argument, NULL, OPTION_ADD_NEEDED},
- '\0', NULL, N_("Set DT_NEEDED tags for DT_NEEDED entries in\n"
- " following dynamic libs"),
- TWO_DASHES },
- { {"no-add-needed", no_argument, NULL, OPTION_NO_ADD_NEEDED},
- '\0', NULL, N_("Do not set DT_NEEDED tags for DT_NEEDED entries\n"
- " in following dynamic libs"),
- TWO_DASHES },
- { {"as-needed", no_argument, NULL, OPTION_AS_NEEDED},
+
+ /* The next two options are deprecated because of their similarity to
+ --as-needed and --no-as-needed. They have been replaced by
+ --resolve-implicit-dynamic-symbols and
+ --no-resolve-implicit-dynamic-symbols. */
+ { {"add-needed", no_argument, NULL, OPTION_ADD_DT_NEEDED_FOR_DYNAMIC},
+ '\0', NULL, NULL, NO_HELP },
+ { {"no-add-needed", no_argument, NULL, OPTION_NO_ADD_DT_NEEDED_FOR_DYNAMIC},
+ '\0', NULL, NULL, NO_HELP },
+
+ { {"as-needed", no_argument, NULL, OPTION_ADD_DT_NEEDED_FOR_REGULAR},
'\0', NULL, N_("Only set DT_NEEDED for following dynamic libs if used"),
TWO_DASHES },
- { {"no-as-needed", no_argument, NULL, OPTION_NO_AS_NEEDED},
- '\0', NULL, N_("Always set DT_NEEDED for following dynamic libs"),
+ { {"no-as-needed", no_argument, NULL, OPTION_NO_ADD_DT_NEEDED_FOR_REGULAR},
+ '\0', NULL, N_("Always set DT_NEEDED for dynamic libraries mentioned on\n"
+ " the command line"),
TWO_DASHES },
{ {"assert", required_argument, NULL, OPTION_ASSERT},
'\0', N_("KEYWORD"), N_("Ignored for SunOS compatibility"), ONE_DASH },
@@ -373,6 +376,15 @@ static const struct ld_option ld_options
{ {"no-check-sections", no_argument, NULL, OPTION_NO_CHECK_SECTIONS},
'\0', NULL, N_("Do not check section addresses for overlaps"),
TWO_DASHES },
+ { {"copy-dt-needed-entries", no_argument, NULL,
+ OPTION_ADD_DT_NEEDED_FOR_DYNAMIC},
+ '\0', NULL, N_("Copy DT_NEEDED links mentioned inside DSOs that follow"),
+ TWO_DASHES },
+ { {"no-copy-dt-needed-entries", no_argument, NULL,
+ OPTION_NO_ADD_DT_NEEDED_FOR_DYNAMIC},
+ '\0', NULL, N_("Do not copy DT_NEEDED links mentioned inside DSOs that follow"),
+ TWO_DASHES },
+
{ {"cref", no_argument, NULL, OPTION_CREF},
'\0', NULL, N_("Output cross reference table"), TWO_DASHES },
{ {"defsym", required_argument, NULL, OPTION_DEFSYM},
@@ -1373,17 +1385,17 @@ parse_args (unsigned argc, char **argv)
case OPTION_WHOLE_ARCHIVE:
whole_archive = TRUE;
break;
- case OPTION_ADD_NEEDED:
- add_needed = TRUE;
+ case OPTION_ADD_DT_NEEDED_FOR_DYNAMIC:
+ add_DT_NEEDED_for_dynamic = TRUE;
break;
- case OPTION_NO_ADD_NEEDED:
- add_needed = FALSE;
+ case OPTION_NO_ADD_DT_NEEDED_FOR_DYNAMIC:
+ add_DT_NEEDED_for_dynamic = FALSE;
break;
- case OPTION_AS_NEEDED:
- as_needed = TRUE;
+ case OPTION_ADD_DT_NEEDED_FOR_REGULAR:
+ add_DT_NEEDED_for_regular = TRUE;
break;
- case OPTION_NO_AS_NEEDED:
- as_needed = FALSE;
+ case OPTION_NO_ADD_DT_NEEDED_FOR_REGULAR:
+ add_DT_NEEDED_for_regular = FALSE;
break;
case OPTION_WRAP:
add_wrap (optarg);
diff -rup ../binutils-2.20.51.0.2/ld/NEWS ./ld/NEWS
--- ../binutils-2.20.51.0.2/ld/NEWS 2010-01-20 08:27:18.000000000 +0000
+++ ./ld/NEWS 2010-01-13 16:01:16.000000000 +0000
@@ -1,5 +1,8 @@
-*- text -*-
+* --add-needed renamed to --copy-dt-needed-entries in order to avoid confusion
+ with --as-needed option.
+
* Add support for the Renesas RX processor.
Changes in 2.20:
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