[squid-dev] More woes with ubuntu-precise

[Kinkie]

Hi,
   EnumIterator has brought out one more issue with ubuntu-precise: since
it carries gcc-4.6, it doesn't support std::underlying_type<enum>.

The options are:
- drop support for precise in trunk. We claim to need gcc 4.8 anyway
- not to use std::underlying_type and blindly use int.
- do template metaprogramming to detect std::underlying_type, fall back to
int if not possible
- use autoconf

3. and 4. are quite crazy IMO but I mentioned them for completeness' sake.
Any opinion on 1. and 2.?

-- 
    Francesco
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