[Insight-developers] ITK Shared Build with VS2012

[Bruno Ronzani]

I just tried to add the osgDB::fstream class to my project :

- copying both osgDB/fstream.h and osgDB/fstream.cpp to my project
source dir, adding them to my project.
- removing all the "DLL_EXPORT" macros, but keeping the namespaces

=> compilation succeeds, without any link error.

If that can help...

Thanks again,

Bruno

On Mon, Feb 4, 2013 at 2:33 PM, Bruno Ronzani <bruno.ronzani at oyez.fr> wrote:
> Hello Brad,
>
> Thank you for your answer.
>
> You are right, here is the osgDB/fstream header :
>
> https://github.com/openscenegraph/osg/blob/master/include/osgDB/fstream
>
> As you can see, osg cleanly redefines its own fstream, but that should
> not be a problem at all.
>
> I've read several times this issue with this kind of answer:
>
> "I have been using Visual Studio 2010 and fstreams and OSG DLLs with
> no issues at all. The only possibility is you are compiling with
> incompatible compiler options between OSG and your other library. All
> files must be compiled /MD(d) and of course compiled with Visual
> Studio 2010."
>
> My guess is I haven't really compiled ITK with /MD, don't you think ?
>
> If you want a very simple example, I can try to provide one.
>
> Thanks again,
>
> On Mon, Feb 4, 2013 at 1:56 PM, Bradley Lowekamp <blowekamp at mail.nih.gov> wrote:
>> Hello,
>>
>> Are you using a CMake file to build your project?
>>
>> Can you boil down this issue to a minimal example to reproduce this error?
>>
>> What seems odd to me is that it sounds like osg92-osgDB.dll is export the std::basic_ifstream. So this may not even be an ITK issue.
>>
>> Brad
>>
>> On Feb 4, 2013, at 6:53 AM, Bruno Ronzani <bruno.ronzani at oyez.fr> wrote:
>>
>>> Hello everyone,
>>>
>>> I am doing all I can to build ITK on VS2012, but I am experiencing a
>>> lot of trouble...
>>>
>>> - I am using CMake.
>>> - If I choose to build "static" (build_shared unchecked) ITK,
>>> everything compiles fine.
>>> - if I choose to build "shared" (build_shared checked), everything
>>> compiles fine too. One ITKCommon-4.0.dll is created.
>>>
>>> Now here the trouble...
>>>
>>> When I try to compile a sample program with OpenSceneGraph, I have a
>>> bunch of link errors of type :
>>>
>>> ITKMetaIO-4.0.lib(metaObject.obj) : error LNK2005: "public: __thiscall
>>> std::basic_ifstream<char,struct std::char_traits<char>
>>>> ::basic_ifstream<char,struct std::char_traits<char> >(void)"
>>> (??0?$basic_ifstream at DU?$char_traits at D@std@@@std@@QAE at XZ) already
>>> defined in osgDB.lib(osg92-osgDB.dll)
>>>
>>> Apparently, this kind of errors appear when a static library is linked
>>> with a dynamic one...
>>> I've checked in my "shared" ITK solution project : most of the
>>> projects are still built in static mode.
>>> I tried to force the "Use MFC in a Shared DLL" but it doesn't change anything.
>>> If I force the Configuration Type to .dll, then I have a bunch of link
>>> errors, like :
>>>
>>> unresolved external symbol __imp__RegCloseKey at 4 referenced in function
>>> "public: static bool __cdecl
>>> itksys::SystemTools::DeleteRegistryValue(char const *,enum
>>> itksys::SystemTools::KeyWOW64)"
>>> (?DeleteRegistryValue at SystemTools@itksys@@SA_NPBDW4KeyWOW64 at 12@@Z)
>>>
>>> Any idea ?
>>>
>>> Thank you very much !
>>>
>>> Cheers,
>>>
>>> Bruno
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