From: Ian Lance Taylor <iant@google.com>
To: John Marino <binutils@marino.st>
Cc: binutils@sourceware.org
Subject: Re: gold linker 2.22 regressed for DragonFly
Date: Mon, 02 Jan 2012 18:38:00 -0000 [thread overview]
Message-ID: <mcr4nwe2bmv.fsf@dhcp-172-18-216-180.mtv.corp.google.com> (raw)
In-Reply-To: <4F017A8B.1000905@marino.st> (John Marino's message of "Mon, 02 Jan 2012 10:36:11 +0100")
John Marino <binutils@marino.st> writes:
> On 1/2/2012 3:05 AM, Ian Lance Taylor wrote:
>> John Marino <binutils@marino.st> writes:
>>
>>> On 12/2/2011 3:27 PM, Ian Lance Taylor wrote:
>>>> John Marino <binutils@marino.st> writes:
>>>>
>>>>> I need to stress that gold built with ld does not have this problem.
>>>>> It's only gold built with gold that segfaults. Does that affect your
>>>>> answer?
>>>>
>>>> Try using the gold option --no-ctors-in-init-array.
>>>>
>>>> Ian
>>>
>>> I'm sorry that I had to put this away for a while, but I've picked it
>>> back up today.
>>>
>>> Gold build with ld will function without segfaults and produces executables.
>>> Gold build with gold segfaults. It ignores all command-line options.
>>>
>>> I modified the makefile to set optimization level to 0. That let me see
>>> the values of variables in gdb. Using gdb on ld-new (gold built with
>>> ld), "print options" on gdb shows a properly defined option set of
>>> General_options class. Doing the same for ld1 (gold built by gold)
>>> shows every single option with null pointers. Not even strings like
>>> "Report usage information" and "Report version information" are included.
>>>
>>> So the problem lies in options.h within the General_options class. I
>>> have no idea what ld-new is doing wrong such that ld1 can't built its
>>> option set. These definitions are built with macros though.
>>
>>
>> Did you try using the --no-ctors-in-init-array option?
>>
>> Ian
>
> Yes, I modified the gold makefile to add that to ld1_LDFLAGS and it
> makes no difference. The resultant ld1 will still segfault as it tries
> to build ld2.
What linker are you using to build ld1?
You said earlier that gold built with ld does not have a problem. Only
gold build with gold segfaults. I am suggesting that you use
--no-ctors-in-init-array when running gold. In fact you should try just
editing options.h to make --no-ctors-in-init-array the default to see if
that fixes all your problems.
Otherwise, the problem you describe suggests that global constructors
are not running correctly when running gold itself, but I don't know why
that would happen if you are not linking gold itself with gold.
Ian
next prev parent reply other threads:[~2012-01-02 18:38 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-01 22:16 John Marino
2011-12-02 4:59 ` Ian Lance Taylor
2011-12-02 8:44 ` John Marino
2011-12-02 14:28 ` Ian Lance Taylor
2011-12-31 16:40 ` John Marino
2012-01-02 2:05 ` Ian Lance Taylor
2012-01-02 9:36 ` John Marino
2012-01-02 18:38 ` Ian Lance Taylor [this message]
2012-01-02 19:27 ` John Marino
2012-01-02 19:48 ` John Marino
2012-01-02 22:56 ` John Marino
2012-01-03 9:20 ` gold linker 2.22 regressed for DragonFly [revised testsuite results] John Marino
2012-01-05 18:32 ` Ian Lance Taylor
2012-01-06 10:24 ` John Marino
2012-01-06 14:43 ` Ian Lance Taylor
2012-01-06 20:04 ` John Marino
2012-01-22 18:59 ` John Marino
2012-01-22 19:43 ` Ian Lance Taylor
2012-01-22 20:46 ` John Marino
2012-01-23 16:49 ` Ian Lance Taylor
2012-01-03 19:43 ` gold linker 2.22 regressed for DragonFly Ian Lance Taylor
2012-01-05 17:30 ` John Marino
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