[cone] Poll: C++11 compiler support

[Sam V. <mr...@co...>]

The forward match of progress is requiring a clean break from the pre-c++11  
days. Under consideration is migrating the courier-unicode library, used by  
both Courier and Cone, to use C++11's unicode support only.

I am taking a poll whether there's still any notable platforms where Courier  
and Cone is used that's still using an old compiler that does not support  
C++11.

According to gcc's documentation, gcc 4.8.1 was the first version with full  
C++11 support; but it's likely that older versions of gcc had sufficient  
support. gcc 4.5's compliance page gives Unicode string literals as  
supported, so I'm fairly confident of sufficient C++11 unicode support at  
least in gcc 4.5, at the latest.

I'd like to know if your compiler does not support C++11 unicode strings.  
This can be determined with a simple test:

#include <string>

int main()
{
    char32_t c=0;
    std::u32string u;

    return 0;
}

Save the above as "utest.C", then execute either:

g++ -o utest utest.C

or

g++ -std=c++11 -o utest utest.C

If either one completes without errors, you're good. This is if your  
compiler is "g++", of course. Certain platforms, like Debian, FreeBSD, and  
many others, might have multiple versions of gcc installed; typically as  
"g++NN". Use the appropriate command for your gcc.