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* [Bug c++/13150] New: WEAK symbols not exported by collect2
@ 2003-11-21 16:03 greed at pobox dot com
2003-11-21 16:04 ` [Bug c++/13150] " greed at pobox dot com
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: greed at pobox dot com @ 2003-11-21 16:03 UTC (permalink / raw)
To: gcc-bugs
GCC 3.3 and up on AIX 5.2 correctly detect that the native assembler and linker
finally support weak symbols (though there are still issues...).
But collect2 doesn't recognize any weak exported symbol as being exported, so
GCC's C++ libraries, wind up with Important Things inaccessible. Here's a
simple testcase, using only C, to show the problem:
% cat >lib.c <<'EOF'
int __attribute__ ((weak)) a = 20;
int foo (void) { return a; }
EOF
% cat >prog.c <<'EOF'
extern int a;
int main(int argc,char ** argv) { return a; }
EOF
Compiled using:
% gcc -shared -o liblib.so lib.c
% gcc -Wl,-brtl,-bnortllib -o prog prog.c -L. -llib
ld: 0711-317 ERROR: Undefined symbol: a
ld: 0711-345 Use the -bloadmap or -bnoquiet option to obtain more information.
collect2: ld returned 8 exit status
If we examine the static symbol table of liblib.so, we see 'a' is present and
marked weak as expected:
% dump -tv liblib.so | grep ' a'
[2] m 0x20000340 .data 1 unamex a
[14] m 0x20000290 .data 1 weak a
But the dynamic symbol table does not have 'a':
% dump -Tv liblib.so | grep ' a'
[no output]
I have updated collect2.c to recognize AIX's C_WEAKEXT and consider such symbols
candidates for exporting. The patch will be attached after I open this.
With the patch, the dynamic symbol table becomes:
[1] 0x20000290 .data wEXP RW Ldef [noIMid] a
(Also, the unused function foo is no longer required to fool linker into keeping
'a'.)
--
Summary: WEAK symbols not exported by collect2
Product: gcc
Version: 3.3.2
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: greed at pobox dot com
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: powerpc-ibm-aix5.2.0.0
GCC host triplet: powerpc-ibm-aix5.2.0.0
GCC target triplet: powerpc-ibm-aix5.2.0.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13150
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/13150] WEAK symbols not exported by collect2
2003-11-21 16:03 [Bug c++/13150] New: WEAK symbols not exported by collect2 greed at pobox dot com
@ 2003-11-21 16:04 ` greed at pobox dot com
2003-11-21 16:08 ` [Bug other/13150] " pinskia at gcc dot gnu dot org
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: greed at pobox dot com @ 2003-11-21 16:04 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From greed at pobox dot com 2003-11-21 16:04 -------
Created an attachment (id=5181)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=5181&action=view)
Patch to teach collect2.c to recognize AIX C_WEAKEXT symbols.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13150
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug other/13150] WEAK symbols not exported by collect2
2003-11-21 16:03 [Bug c++/13150] New: WEAK symbols not exported by collect2 greed at pobox dot com
2003-11-21 16:04 ` [Bug c++/13150] " greed at pobox dot com
@ 2003-11-21 16:08 ` pinskia at gcc dot gnu dot org
2003-12-06 19:10 ` [Bug target/13150] " dje at gcc dot gnu dot org
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2003-11-21 16:08 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2003-11-21 16:08 -------
Patches should go to gcc-patches@gcc.gnu.org as not every maintainer reads bugs (do not know
why), also patches need to be from the head of the tree of the cvs.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Component|c++ |other
Ever Confirmed| |1
Last reconfirmed|0000-00-00 00:00:00 |2003-11-21 16:08:42
date| |
Target Milestone|--- |3.4
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13150
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/13150] WEAK symbols not exported by collect2
2003-11-21 16:03 [Bug c++/13150] New: WEAK symbols not exported by collect2 greed at pobox dot com
2003-11-21 16:04 ` [Bug c++/13150] " greed at pobox dot com
2003-11-21 16:08 ` [Bug other/13150] " pinskia at gcc dot gnu dot org
@ 2003-12-06 19:10 ` dje at gcc dot gnu dot org
2003-12-08 4:26 ` dje at gcc dot gnu dot org
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: dje at gcc dot gnu dot org @ 2003-12-06 19:10 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Last reconfirmed|2003-11-21 16:08:42 |2003-12-06 19:10:16
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13150
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/13150] WEAK symbols not exported by collect2
2003-11-21 16:03 [Bug c++/13150] New: WEAK symbols not exported by collect2 greed at pobox dot com
` (2 preceding siblings ...)
2003-12-06 19:10 ` [Bug target/13150] " dje at gcc dot gnu dot org
@ 2003-12-08 4:26 ` dje at gcc dot gnu dot org
2003-12-08 19:02 ` cvs-commit at gcc dot gnu dot org
2003-12-08 19:48 ` pinskia at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: dje at gcc dot gnu dot org @ 2003-12-08 4:26 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From dje at gcc dot gnu dot org 2003-12-08 04:25 -------
http://gcc.gnu.org/ml/gcc-patches/2003-12/msg00731.html
--
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13150
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/13150] WEAK symbols not exported by collect2
2003-11-21 16:03 [Bug c++/13150] New: WEAK symbols not exported by collect2 greed at pobox dot com
` (3 preceding siblings ...)
2003-12-08 4:26 ` dje at gcc dot gnu dot org
@ 2003-12-08 19:02 ` cvs-commit at gcc dot gnu dot org
2003-12-08 19:48 ` pinskia at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2003-12-08 19:02 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2003-12-08 19:02 -------
Subject: Bug 13150
CVSROOT: /cvs/gcc
Module name: gcc
Branch: gcc-3_3-branch
Changes by: dje@gcc.gnu.org 2003-12-08 19:02:43
Modified files:
gcc : ChangeLog collect2.c
Log message:
PR target/13150
* collect2.c (GCC_OK_SYMBOL): Add support for AIX C_WEAKEXT.
(GCC_UNDEF_SYMBOL): Same.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.16114.2.831&r2=1.16114.2.832
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/collect2.c.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.142.4.2&r2=1.142.4.3
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13150
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/13150] WEAK symbols not exported by collect2
2003-11-21 16:03 [Bug c++/13150] New: WEAK symbols not exported by collect2 greed at pobox dot com
` (4 preceding siblings ...)
2003-12-08 19:02 ` cvs-commit at gcc dot gnu dot org
@ 2003-12-08 19:48 ` pinskia at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2003-12-08 19:48 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|3.4 |3.3.3
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13150
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2003-12-08 19:48 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2003-11-21 16:03 [Bug c++/13150] New: WEAK symbols not exported by collect2 greed at pobox dot com
2003-11-21 16:04 ` [Bug c++/13150] " greed at pobox dot com
2003-11-21 16:08 ` [Bug other/13150] " pinskia at gcc dot gnu dot org
2003-12-06 19:10 ` [Bug target/13150] " dje at gcc dot gnu dot org
2003-12-08 4:26 ` dje at gcc dot gnu dot org
2003-12-08 19:02 ` cvs-commit at gcc dot gnu dot org
2003-12-08 19:48 ` pinskia at gcc dot gnu dot org
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