Re: [Boost-users] building on OS X with custom gcc version

Subject: Re: [Boost-users] building on OS X with custom gcc version
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2018-06-25 16:48:29

AMDG

On 06/25/2018 10:31 AM, Damien via Boost-users wrote:
> On Jun 24, 2018, at 7:02 PM, Steven Watanabe via Boost-users
> <boost-users_at_[hidden]> wrote:
>>>> <snip>
>>>> Okay.  I see what's going on here.  Boost.Context
>>>> only supports darwin and clang on OSX.
>>>>
>>>> You can work around the issue by finding this
>>>> in libs/context/build/Jamfile.v2:
>>>>
>>>> # X86_64/SYSV/MACH-O
>>>> alias asm_sources
>>>> Â Â  : asm/make_x86_64_sysv_macho_gas.S
>>>> Â Â Â Â  asm/jump_x86_64_sysv_macho_gas.S
>>>> Â Â Â Â  asm/ontop_x86_64_sysv_macho_gas.S
>>>> Â Â  : <abi>sysv
>>>> Â Â Â Â  <address-model>64
>>>> Â Â Â Â  <architecture>x86
>>>> Â Â Â Â  <binary-format>mach-o
>>>> Â Â Â Â  <toolset>clang
>>>> Â Â  ;
>>>>
>>>> and making a copy, replacing clang with gcc.
>>> This didn’t work, unfortunately the errors are the same as before.
>> I assumed that you were building for x86_64.  If you're building
>> for a different platform, then you'd need to find the alias for
>> that architecture, instead.
> 
> Actually I'd like to understand what we did wrong.  Just to be clear
> because terminology can be different, that's a full 64-bit build for
> 64-bit Intel architecture, correct?

Right.  Hmm.  The easiest way to debug this is to use
--with-context --debug-building
which will show the build properties.
(--debug-building generates a lot of output, so it's
better to restrict it to Boost.Context only, hence
--with-context).

In particular, check the values of <abi> and <binary-format>
for the asm_sources target.  <architecture> and <address-model>
should be correct, especially since you're passing
address-model explicitly, but it wouldn't hurt to check them
as well.

>Â  That is what we were after. Our
> build command for a gcc release build was:
> 
> ./b2 --toolset=gcc-8.1 address-model=64 --stagedir=./stage64release
> --build-dir=./build64release --layout=system --without-mpi
> variant=release link=shared threading=multi runtime-link=shared install
> --prefix=./osx64release/indep --exec-prefix=./osx64release/bin
> --libdir=./osx64release/lib --includedir=./osx64release/include
> 
> user-config.jam entry is:
> 
> # gcc 8
> using gcc
> Â Â Â  : 8.1
> Â Â Â  : "/usr/local/bin/g++-8"
> Â Â Â  ;
> 

In Christ,
Steven Watanabe