Re: dead-code stripping, pass two...
Re: dead-code stripping, pass two...
- Subject: Re: dead-code stripping, pass two...
- From: "Andy O'Meara" <email@hidden>
- Date: Wed, 17 May 2006 23:38:27 -0400
- Thread-topic: dead-code stripping, pass two...
If you search this list archive, you'll find the below thread -- it should
address your questions/problems:
http://lists.apple.com/archives/xcode-users/2006/Mar/msg00552.html
On 5/17/06 10:44 PM, "Steve Christensen" <email@hidden> wrote:
> Following another other dead-code stripping thread, I turned on
> "Symbols hidden by default" (aka [GCC_SYMBOLS_PRIVATE_EXTERN, -
> fvisibility=hidden]) and noticed a reduction in executable size.
> However nm is still reporting a lot of API symbols that are only
> referenced from unused C++ class methods, so I don't know where the
> reduction actually came from. Thus I'm still kinda in the same boat
> is before.
>
> Any more guesses? :-)
>
>
>
> On May 17, 2006, at 2:16 PM, Steve Christensen wrote:
>
>> On May 17, 2006, at 2:03 PM, Ladd Van Tol wrote:
>>
>>> On May 17, 2006, at 11:27 AM, Steve Christensen wrote:
>>>
>>>> I'd asked about this last month and didn't really receive any
>>>> responses, so I figure I should try again just in case.
>>>>
>>>> I have a number of plug-in projects I imported from CodeWarrior
>>>> to Xcode as part of making them Universal and all that. They
>>>> build and run correctly, but I've noticed that the binary size
>>>> has grown considerably more than 2x (in one case going from
>>>> around 48K in CodeWarrior to 197K as a UB built by Xcode).
>>>>
>>>> After doing a little more poking around, I found that the problem
>>>> appears to be that unused class methods are not being stripped
>>>> out, which means that the method code as well as any that they
>>>> reference, etc., etc., gets left in the binary. These are not
>>>> virtual methods, BTW.
>>>>
>>>> I have dead-code stripping and symbol stripping turned on, as
>>>> well as doing an extra post-link strip pass and specifying an
>>>> exported symbols file just to see if that would make a
>>>> difference. It doesn't.
>>>>
>>>> Is there some magical incantation that I've missed someplace? A
>>>> known linker bug? A bug in the CodeWarrior project import process?
>>>
>>> This is fairly obvious, but do you have -gfull set?
>>
>> Yep, or at least that's what the project settings say.
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