Re: Release works, Debug (still) crashes on OS X Leopard, Xcode 3.0

[Graham Reitz]

I figured it out.  I had to change the location where it looks for the  
dylib.

thanks,
g

On Dec 5, 2007, at 11:19 PM, Graham Reitz wrote:

> Huh weird.
>
> I built mysql++ the following way:
>
> make clean
> ./configure CXXFLAGS="-g -D_GLIBCXX_DEBUG=1 - 
> D_GLIBCXX_DEBUG_PEDANTIC=1" --with-mysql=/sw
> make
>
> The resulting dylib is a little less than 50% larger than the  
> original.
>
> I then renamed the dylib (added a _d) and copied the dylib over to  
> the /usr/local/lib directory and updated the Xcode project to use  
> the new mysql++ dylib.
>
> I received the same assertion as before when running the debug build.
>
> I was a little suspicious that the original dylib was getting loaded  
> anyways...
>
> I then copied over the new (with _DEBUG) libmysqlpp.dylib to  /usr/ 
> local/lib and it worked fine.
>
> Is there something that caused the original libmysqlpp.dylib to get  
> loaded instead of the renamed libmysqlpp_d.dylib, even though I told  
> it not to in Xcode?
>
> thanks,
> graham
>
> On Dec 5, 2007, at 10:08 PM, Graham Reitz wrote:
>
>> Ok cool.  Thanks guys.   I will get that done Warren.
>>
>> It will be good experience for me.  I start vacation on the 14th  
>> and will get that rolling at that point.  It would be really nice  
>> to have Xcode project files for mysql++.  (People like me won't be  
>> able to do this again.)
>>
>> Thanks for that link Jon.  This says it all:
>>
>> "To use the libstdc++ debug mode, compile your application with the  
>> compiler flag -D_GLIBCXX_DEBUG. Note that this flag changes the  
>> sizes and behavior of standard class templates such as std::vector,  
>> and therefore you can only link code compiled with debug mode and  
>> code compiled without debug mode if no instantiation of a container  
>> is passed between the two translation units."
>>
>> What I wasn't aware of is that you can link debug (-g) and release  
>> code but not when D_GLIBCXX_DEBUG has been defined (if containers  
>> are passed between cpps). It seems like using D_GLIBCXX_DEBUG is a  
>> really good idea when debugging since it will catch improper usage  
>> of the stdlibc++.
>>
>> graham
>>
>>
>> On Dec 5, 2007, at 6:56 PM, Warren Young wrote:
>>
>>> Graham Reitz wrote:
>>>> Why doesn't mysql++ [have a special debug build mode]?
>>>
>>> There's no real history of such things on *ix systems, so where it  
>>> is done, it's done in some way particular to that system.  And, if  
>>> you use the Unixy command line build systems on OS X, the current  
>>> behavior is fine.  This is no doubt why you're the first to bring  
>>> this to my attention.
>>>
>>> Compare Visual Studio.  Almost everyone uses the IDE, not the  
>>> command line tools, and the IDE sets up both debug and release  
>>> builds for any new project.  It's both standard and the default,  
>>> so everyone does it.
>>>
>>> On OS X, what we have here are two different use cases, so they  
>>> should be handled separately: autoconf with no special debug modes  
>>> for command line geeks like me, and Xcode project files set up to  
>>> build both debug and release versions for folk like you.  Bakefile  
>>> can generate Xcode project files, so it's just a matter of using  
>>> them.
>>>
>>> I nominate you to do it. :)  Seriously.  I use OS X every day, but  
>>> beyond some "Hello, world" toy programs, I've never used Xcode the  
>>> IDE.  You're in the best position to scratch this itch.
>>>
>>> Xcode project support apparently goes back to 0.1.9 in Bakefile,  
>>> but there are reportedly big improvements in svn, so I'd recommend  
>>> you use that, at least to start.  Later you can roll back to 0.1.9  
>>> to see if it still works adequately.  I'm already of half a mind  
>>> to make MySQL++ v3.0 wait on Bakefile 0.2.3 to get VC2003 support.
>>>
>>> The v3 effort is getting close to winding up, but you've probably  
>>> got a few weeks at least to get something to me.
>>>
>>> -- 
>>> MySQL++ Mailing List
>>> For list archives: http://lists.mysql.com/plusplus
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>>>
>>
>
>
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