Undefined reference to static member [duplicate]

Question

I have a static member in my class. It's declared and defined:

In my header:

class Bla { ... static Bla* instance; ... };

In my implementation file:

Bla::Bla* instance = 0;

But ld doesn't seems to like it:

release/bla.o:bla.cpp:(.text+0x19f7): undefined reference to `Bla::instance'

I'm using GCC 4.4.0 from the Qt SDK.

I can't figure it out what I'm doing wrong. Can someone shed a light on this issue?

No Results Found · Accepted Answer · 2013-02-15 13:23:27Z

8

You missed a Bla, and instead created a global. Make it:

Bla* Bla::instance = 0;

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answered Sep 28, 2010 at 19:46

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