Re: ZXing Link Error on Visual C++ 2010

[Steven Parkes]

MS does some weird non-standard/incompatible stuff if you don't add /Za to your project.

On Jun 4, 2013, at 8:03 AM, NeoDreamer <asu...@gmail.com> wrote:

> I was build ZXing static library by CMAKE and Visual C++ 2010.
> After that I got the "libzxing.lib"
>
> And then I try to use libzxing.lib on Visual C++ Project.
> but I get the error message
> libzxing.lib(DecodeHints.obj) : error LNK2005: "public: static unsigned int const zxing::DecodeHints::CHARACTER_SET" (?CHARACTER_SET@DecodeHints@zxing@@2IB) already defined in stdafx.obj
>
> What I have to do for remove the error message.
>
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[NeoDreamer]

Thanks your answer.

But I do not add "/Za" option to my project.

and same after add "/Za" option.

[Steven Parkes]

I'm not familiar enough with VS to help beyond what I've said (which I know isn't much). Somebody else on the list might have a better idea ...

[hico]

I also have this problem.

Does somebody resolved this weird issue ?

[Sebastian Göbel]

The CHARACTER_SET parameter is defined and initialized in DecodeHints.h:

static const DecodeHintType CHARACTER_SET = 1 << 30;

In DecodedHints.cpp is an (unnecessary?) redefinition of this parameter and the visual compiler is not happy about:

line 32: const DecodeHintType DecodeHints::CHARACTER_SET;

Just remove (comment out) this line and rebuild the lib.

[hico]

Well, actually, you do not need to remove this line.
However, the initialization must be done in the CPP file, not in the .h.
It solved the problem for me ;)

[wael...@gmail.com]

HI Guys,
I made the modification mentioned before but i still get this Error
if anyone no how to solve it please help!

[Joonggun Ha]

Did you fix the problem?

Could you send me the lib files(include .dll and .h)?
I could not make lib file cuz of errer.

Pls, help me~!

[9629...@qq.com]

On Tuesday, June 4, 2013 at 11:03:13 PM UTC+8, NeoDreamer wrote:
> I was build ZXing static library by CMAKE and Visual C++ 2010.
> After that I got the "libzxing.lib"
>
>
> And then I try to use libzxing.lib on Visual C++ Project.
> but I get the error message 
> libzxing.lib(DecodeHints.obj) : error LNK2005: "public: static unsigned int const zxing::DecodeHints::CHARACTER_SET" (?CHARACTER_SET@DecodeHints@zxing@@2IB) already defined in stdafx.obj
>
>
> What I have to do for remove the error message.

将“DecodeHints.h”文件中第57行： static const DecodeHintType CHARACTER_SET = 1 << 30 语句的赋值操作放在“DecodeHints.cpp”中实现，问题即可解决。