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* ldgram.y (AS_NEEDED): New token.

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(input_list): Handle AS_NEEDED ( input_list ).
	* ldlex.l (AS_NEEDED): Add.
	* ld.texinfo: Document AS_NEEDED ().
	* NEWS: Mention AS_NEEDED ().
This commit is contained in:
Jakub Jelinek 2005-01-21 12:04:25 +00:00
parent 666ec76f41
commit b717d30eb5
5 changed files with 40 additions and 4 deletions
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8
ld/ChangeLog
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@ -1,3 +1,11 @@
2005-01-21 Jakub Jelinek <jakub@redhat.com>
* ldgram.y (AS_NEEDED): New token.
(input_list): Handle AS_NEEDED ( input_list ).
* ldlex.l (AS_NEEDED): Add.
* ld.texinfo: Document AS_NEEDED ().
* NEWS: Mention AS_NEEDED ().
2005-01-21 Ben Elliston <bje@au.ibm.com>
* ldlang.c (lang_reasonable_defaults): Remove.

3
ld/NEWS
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@ -1,5 +1,8 @@
-*- text -*-
* New linker script construct AS_NEEDED(), which sets the --as-needed flag
for input files listed inside of it.
* A new command-line option, --sysroot, can be used to override the
default sysroot location. It only applies to toolchains that were
configured using --with-sysroot.

14
ld/ld.texinfo
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@ -1,7 +1,7 @@
\input texinfo
@setfilename ld.info
@c Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
@c 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
@c 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
@syncodeindex ky cp
@include configdoc.texi
@c (configdoc.texi is generated by the Makefile)
@ -2576,6 +2576,18 @@ files should all be archives, and they are searched repeatedly until no
new undefined references are created. See the description of @samp{-(}
in @ref{Options,,Command Line Options}.
@item AS_NEEDED(@var{file}, @var{file}, @dots{})
@itemx AS_NEEDED(@var{file} @var{file} @dots{})
@kindex AS_NEEDED(@var{files})
This construct can appear only inside of the @code{INPUT} or @code{GROUP}
commands, among other filenames. The files listed will be handled
as if they appear directly in the @code{INPUT} or @code{GROUP} commands,
with the exception of ELF shared libraries, that will be added only
when they are actually needed. This construct essentially enables
@option{--as-needed} option for all the files listed inside of it
and restores previous @option{--as-needed} resp. @option{--no-as-needed}
setting afterwards.
@item OUTPUT(@var{filename})
@kindex OUTPUT(@var{filename})
@cindex output file name in linker scripot

16
ld/ldgram.y
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@ -1,6 +1,6 @@
/* A YACC grammar to parse a superset of the AT&T linker scripting language.
Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
2001, 2002, 2003, 2004 Free Software Foundation, Inc.
2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
Written by Steve Chamberlain of Cygnus Support (steve@cygnus.com).
This file is part of GNU ld.
@ -144,7 +144,7 @@ static int error_index;
%token STARTUP HLL SYSLIB FLOAT NOFLOAT NOCROSSREFS
%token ORIGIN FILL
%token LENGTH CREATE_OBJECT_SYMBOLS INPUT GROUP OUTPUT CONSTRUCTORS
%token ALIGNMOD AT SUBALIGN PROVIDE
%token ALIGNMOD AT SUBALIGN PROVIDE AS_NEEDED
%type <token> assign_op atype attributes_opt sect_constraint
%type <name> filename
%token CHIP LIST SECT ABSOLUTE LOAD NEWLINE ENDWORD ORDER NAMEWORD ASSERT_K
@ -372,6 +372,18 @@ input_list:
| input_list LNAME
{ lang_add_input_file($2,lang_input_file_is_l_enum,
(char *)NULL); }
| AS_NEEDED '('
{ $<integer>$ = as_needed; as_needed = TRUE; }
input_list ')'
{ as_needed = $<integer>3; }
| input_list ',' AS_NEEDED '('
{ $<integer>$ = as_needed; as_needed = TRUE; }
input_list ')'
{ as_needed = $<integer>5; }
| input_list AS_NEEDED '('
{ $<integer>$ = as_needed; as_needed = TRUE; }
input_list ')'
{ as_needed = $<integer>4; }
;
sections:

3
ld/ldlex.l
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@ -1,7 +1,7 @@
%{
/* Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
This file is part of GLD, the Gnu Linker.
@ -269,6 +269,7 @@ V_IDENTIFIER [*?.$_a-zA-Z\[\]\-\!\^\\]([*?.$_a-zA-Z0-9\[\]\-\!\^\\]|::)*
<BOTH,SCRIPT>"OUTPUT" { RTOKEN(OUTPUT);}
<BOTH,SCRIPT>"INPUT" { RTOKEN(INPUT);}
<EXPRESSION,BOTH,SCRIPT>"GROUP" { RTOKEN(GROUP);}
<EXPRESSION,BOTH,SCRIPT>"AS_NEEDED" { RTOKEN(AS_NEEDED);}
<EXPRESSION,BOTH,SCRIPT>"DEFINED" { RTOKEN(DEFINED);}
<BOTH,SCRIPT>"CREATE_OBJECT_SYMBOLS" { RTOKEN(CREATE_OBJECT_SYMBOLS);}
<BOTH,SCRIPT>"CONSTRUCTORS" { RTOKEN( CONSTRUCTORS);}