Re: [boost] Clang 3.4 failing to compile boost 1.57 headers

Subject: Re: [boost] Clang 3.4 failing to compile boost 1.57 headers
From: Marc Glisse (marc.glisse_at_[hidden])
Date: 2015-01-18 18:51:57

On Sun, 18 Jan 2015, John Maddock wrote:

>>> Results are as follows for clang 3.5
>>> 
>>> gcc version      gcc reports     clang reports
>>> 4.6.3                  40603             40700
>>> 4.8.2                  40802             40800
>>> 4.9.0                  40900             40900
>>> 4.9.2                  40902             40900
>>> 5.0.0                  50000             40700
>>> 
>>> I can see that there are some serious problems getting the correct
>>> identification with Clang.
>> 
>> Looks like unless it recognizes 4.8 or 4.9, it reports 40700 by default,
>> which would make things a bit complicated.
>
> No it checks for C++11 headers introduced with specific GCC versions - if the 
> header is found (via clang __has_include) then the compiler version is 
> assumed to be later than the GCC version that first introduced that header.
>
> So... 4.6.3 reporting 4.7 implies that <chrono> is present?

4.6.4 has <chrono> for me (even 4.4.7 has it), so I guess you should check 
another header instead (sorry, I don't have 4.5 so I can't easily suggest 
one).

-- 
Marc Glisse