[Qt-interest] Qt mocks issue multiple definition of

[Alex Ivasyuv]

On 10/31/2010 11:24 PM, Scott Aron Bloom wrote:
>
> *From:*Alex Ivasyuv [mailto:industral at gmail.com]
> *Sent:* Sunday, October 31, 2010 2:16 PM
> *To:* Scott Aron Bloom
> *Cc:* qt-interest at trolltech.com
> *Subject:* Re: [Qt-interest] Qt mocks issue multiple definition of
>
> On 10/31/2010 11:08 PM, Scott Aron Bloom wrote:
>
> Surprised...
>
> However, I will say this.. you are asking qmake to have multiple files 
> target the same object file...
>
>
> Are they the same if they're in different namespaces?
>
> Absolutely...
>
> The object file is based on the cpp file name, NOT the contents of the 
> file.. You could have 10 classes of different namespaces defined in 
> the .cpp file, and they all go to the same .o file.
>

Yes, if I have 10 classes in one file. But in this case it's in separate 
folders...

Check it out:

$ g++ A/MyClass.cpp B/MyClass.cpp main.cpp

the same code compile success.

Another one example:

$ g++ A/MyClass.cpp -c -o A_MyClass.o
$ g++ B/MyClass.cpp -c -o B_MyClass.o
$ g++ main.cpp -c -o main.o
$ g++ main.o A_MyClass.o B_MyClass.o -o myapp

It's absolutely controlled... And I think qmake should creates 
appropriate Makefile based on paths instead of filenames, e.g.

A_MyClass.o: ....
B_MyClass.o: ....

And now snipped from generated Makefile:

####### Compile

main.o: main.cpp
     $(CXX) -c $(CXXFLAGS) $(INCPATH) -o main.o main.cpp

MyClass.o: A/MyClass.cpp A/MyClass.hpp
     $(CXX) -c $(CXXFLAGS) $(INCPATH) -o MyClass.o A/MyClass.cpp

MyClass.o: B/MyClass.cpp B/MyClass.hpp
     $(CXX) -c $(CXXFLAGS) $(INCPATH) -o MyClass.o B/MyClass.cpp

####### Install

Two identical target names: MyClass.o

You right, it should be posted in bug tracking system...

>
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-- 
Best regards,
Alex Ivasyuv
Senior WebUI Software Engineer
ReelRoles, Inc.


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