MSVC++ 6.0 Linking problem (possible OT)

hamishd

TestClass.obj : error LNK2005: "int volatile bIsProcessing"
(?bIsProcessing @@3HC) already defined in OtherClass.obj

Creating library Release/TestDLL.lib and object Release/TestDLL.exp
Release/TestDLL.dll : fatal error LNK1169: one or more multiply defined
symbols found
In TestClass header file I have:
volatile BOOL bIsProcessing;

In OtherClass I have:
volatile BOOL * pbProcessing;

I cannot link, and I am confused as what is wrong? I can't see any
difference between this situation and one in a different project which
is linking ok

Aug 31 '06 #1

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2174

Jeff Partch

"hamishd" <Ha*********@gm ail.comwrote in message
news:11******** **************@ b28g2000cwb.goo glegroups.com.. .

TestClass.obj : error LNK2005: "int volatile bIsProcessing"
(?bIsProcessing @@3HC) already defined in OtherClass.obj

Creating library Release/TestDLL.lib and object Release/TestDLL.exp
Release/TestDLL.dll : fatal error LNK1169: one or more multiply defined
symbols found
In TestClass header file I have:
volatile BOOL bIsProcessing;

Is this maybe a global defined in the header and included in both?
--
Jeff Partch [VC++ MVP]

Aug 31 '06 #2

Victor Bazarov

hamishd wrote:

TestClass.obj : error LNK2005: "int volatile bIsProcessing"
(?bIsProcessing @@3HC) already defined in OtherClass.obj

Creating library Release/TestDLL.lib and object Release/TestDLL.exp
Release/TestDLL.dll : fatal error LNK1169: one or more multiply
defined symbols found
In TestClass header file I have:
volatile BOOL bIsProcessing;

Never put definitions in the header, unless they are definitions of
functions declared 'inline'. Or definitions of classes. Or of class
templates. Or of function templates. Anyway, do not define *objects*
in headers.

What you probably want is

extern volatile BOOL bIsProcessing; // declaration

in the header and then

volatile BOOL bIsProcessing = false; // definition

in *one* of the C++ files.

In OtherClass I have:
volatile BOOL * pbProcessing;

I cannot link, and I am confused as what is wrong?

The linker already told you: multiple definition of an object.

I can't see any
difference between this situation and one in a different project which
is linking ok

What can I say? Look more carefully. There must be a difference.

V
--
Please remove capital 'A's when replying by e-mail
I do not respond to top-posted replies, please don't ask

Aug 31 '06 #3

hamishd

Never put definitions in the header, unless they are definitions of

functions declared 'inline'. Or definitions of classes. Or of class
templates. Or of function templates. Anyway, do not define *objects*
in headers.

What you probably want is

extern volatile BOOL bIsProcessing; // declaration

in the header and then

volatile BOOL bIsProcessing = false; // definition

in *one* of the C++ files.

Thanks. Got it.

Aug 31 '06 #4

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