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Subject: Re: [boost] clang type traits
From: Doug Gregor (doug.gregor_at_[hidden])
Date: 2011-06-13 15:33:05

On Sun, Jun 12, 2011 at 4:27 AM, Daniel James <dnljms_at_[hidden]> wrote:
> On 10 June 2011 18:13, Doug Gregor <doug.gregor_at_[hidden]> wrote:
>> For Clang feature tests, please use __has_feature (or the newer
>> __has_extension) rather than peeking at Clang version numbers.
>> __has_feature/__has_extension are language-dialect aware and represent
>> what the compiler actually supports, while Clang version numbers can
>> vary widely from one vendor to another (e.g., Apple's version numbers
>> for its Clang-based compilers are distinct from the LLVM project's
>> version numbers for Clang).
> Can we distinguish between Apple's versions and LLVM's versions?

__APPLE_CC__ will say whether we're running on Darwin, but otherwise, no.

  - Doug

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