Re: [Boost-users] [Context] Errors compiling Boost.Log on OS X

Subject: Re: [Boost-users] [Context] Errors compiling Boost.Log on OS X
From: Nat Linden (nat_at_[hidden])
Date: 2013-04-29 08:50:34

[Adding [Context] to subject line to catch Oliver's attention]

On Sun, Apr 28, 2013 at 5:18 PM, Rich E <reakinator_at_[hidden]> wrote:
>
> On Sun, Apr 28, 2013 at 10:37 AM, Nat Linden <nat_at_[hidden]> wrote:
>>
>> I'm using Xcode 4.3.3, gcc 4.2.1, these commands:
>>
>> ./b2 variant=debug address-model=32 architecture=x86 link=static
>> threading=multi libs/context/test
>> ./b2 variant=debug address-model=32 architecture=x86 link=static
>> threading=multi libs/context/example
>
> Sorry, I should have been clearer in that I'm using clang with libc++
> (current Xcode version, 4.6.2), as this is now standard on OS X and required
> by our software framework.

My situation is the opposite of yours: I can't yet upgrade.

> I have the following in my user-config.jam:
>
> using clang : osx
> : xcrun clang -stdlib=libc++ -std=c++11
> ;
>
> To just build context, I do:
>
> ./bootstrap.sh --with-libraries=context
> ./b2 -a toolset=clang-osx link=static threading=multi stage

With Xcode 4.3.3, the above produces warnings but no errors.

> lang-darwin.compile.c++
> bin.v2/libs/context/build/clang-darwin-osx/release/link-static/threading-multi/unsupported.o
> libs/context/src/unsupported.cpp:7:2: error: "platform not supported"
> #error "platform not supported"
>  ^
> 1 error generated.

Unfortunately this source file tells me nothing about the conditions
that lead to its being compiled. I see in
libs/context/build/Jamfile.v2 the following:

alias asm_context_sources
   : unsupported.cpp
   ;

(the only reference I found to 'unsupported' in boost/context or
libs/context). bjam is a black box to me. I must defer to those who do
understand it.