[cfe-dev] Clang and C++Ox : what I'm doing wrong

[Argyrios Kyrtzidis]

On Oct 8, 2010, at 12:27 AM, Jaonary Rabarisoa wrote:

> Hi all,
> 
> I trying build the following simple code that use a static const variable inside a class but I got an undefinend reference error :
> 
> #include <iostream>
> 
> using namespace std;
> 
> class Test
> {
>   public :
>     static const double value = 10.0;
> };
> 
> 
> int main()
> {
>   cout << "hello "  << Test::value << endl;
>   return 0;
> }
> 
> This code produce the following warning and error at link time :
> 
> clang: warning: argument unused during compilation: '-cc1'
> /home/jrabarisoa/Sandbox/test_clang/main.cpp:27:25: warning: in-class initializer for static data member of type 'const double' is a
>       C++0x extension [-Wc++0x-extensions]
>     static const double value = 10.0;
>                         ^       ~~~~
> 1 warning generated.
> Linking CXX executable test
> g++: unrecognized option '-cc1'
> CMakeFiles/test.dir/main.cpp.o: In function `main':
> /home/jrabarisoa/Sandbox/test_clang/main.cpp:(.text+0x7a): undefined reference to `Test::value'
> collect2: ld returned 1 exit status

Why are we requiring a definition for Test::value, isn't this supposed to be used as a constant ? John ?

-Argiris

> 
> What I've missed ?
> 
> I use the latest clang from the svn repository.
> 
> Regards,
> 
> Jaonary
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