Re: ABI ms config

(Switching subject, was  Re: [release] Boost 1.92 RC1 available)

On Mon, Aug 10, 2026 at 7:36 PM Andrey Semashev via Boost <
[email protected]> wrote:

> On 11 Aug 2026 00:58, Tom Kent via Boost wrote:
> > Any ideas where that could be coming from? I'm pretty sure I don't set
> that
> > manually.
>
>
> https://github.com/boostorg/context/blob/cc1b9e02cd530d6607becc984e1e5bfa4f7b3600/boost-context-features.jam#L54-L97
>
> sysv is set by default. The default_abi rule is used by Boost.Context
> project in private requirements, i.e. it applies only to Boost.Context.
> If I'm not mistaken, for everyone else the sysv default remains in
> effect unless abi is specified on the command line.
>
> I think, the feature should be made optional with no default.
> Boost.Context can continue to use the default_abi rule to deduce it from
> the target platform, for everyone else it should not be set.
>
> > On Sat, Aug 8, 2026 at 12:15 AM <[email protected]> wrote:
> >
> >> for Windows '<abi>sysv' is wrong - I believe it should be '<abi>ms'
> >>
> >> 08.08.2026 04:16:00 Tom Kent via Boost <[email protected]>:
> >>
> >>> Still seeing the same config issue I reported for the beta RC:
> >>>
> >>>     - long double support      : yes (cached) [2]
> >>>     - std_wstreambuf           : yes (cached) [2]
> >>> error: No best alternative for
> >>> /D:/RB/boost_1_92_0/libs/graph_parallel/build/boost_graph_parallel with
> >>> <abi>sysv <address-model>32 <architecture>x86 <asynch-exceptions>off
> >>> <binary-format>elf <boost.beast.allow-deprecated>on
> >>> <boost.beast.separate-compilation>on
> >> <boost.cobalt.executor>any_io_executor
> >>> <boost.cobalt.pmr>std <context-impl>fcontext <coverage>off
> >>> <debug-store>object <debug-symbols>on <embed-manifest-via>linker
> >>> <embed-manifest>on <exception-handling>on <extern-c-nothrow>off
> >>> <inlining>off <known-warnings>hide <link>shared <midl-robust>yes
> >>> <midl-stubless-proxy>yes <optimization>off <os>NT <pch>on
> >>> <preserve-test-targets>on <profiling>off <python-debugging>off
> >> <python>3.14
> >>> <rtti>on <runtime-debugging>on <runtime-link>shared <stdlib>native
> >>> <strip>off <target-os>windows <testing.execute>on <threadapi>win32
> >>> <threading>multi <toolset-msvc:version>14.1 <toolset>msvc
> <variant>debug
> >>> <vectorize>off <visibility>hidden <warnings-as-errors>off <warnings>on
> >>> <windows-api>desktop <x-deduced-platform>x86_32
> >>>     matched: (empty)
> >>>     matched: (empty)
> >>>     - lzma                     : no  (cached) [2]
> >>>     - zstd                     : no  (cached) [2]
> >>>
>

I've updated my command to include abi=ms but it is still complaining about
a similar error:

b2 -j%NUMBER_OF_PROCESSORS% --without-mpi --build-dir=D:\RB/bin.v2
--stage-libdir=lib32-msvc-14.1 --build-type=complete toolset=msvc-14.1
address-model=32 architecture=x86 abi=ms stage
Performing configuration checks

    - default address-model    : 64-bit (cached) [1]
    - default architecture     : x86 (cached) [1]
<snip>
    - long double support      : yes (cached) [2]
    - std_wstreambuf           : yes (cached) [2]
error: No best alternative for
/D:/RB/boost_1_93_0/libs/graph_parallel/build/boost_graph_parallel with
<abi>ms <address-model>32 <architecture>x86 <asynch-exceptions>off
<binary-format>elf <boost.beast.allow-deprecated>on
<boost.beast.separate-compilation>on <boost.cobalt.executor>any_io_executor
<boost.cobalt.pmr>std <context-impl>fcontext <coverage>off
<debug-store>object <debug-symbols>on <embed-manifest-via>linker
<embed-manifest>on <exception-handling>on <extern-c-nothrow>off
<inlining>off <known-warnings>hide <link>shared <midl-robust>yes
<midl-stubless-proxy>yes <optimization>off <os>NT <pch>on
<preserve-test-targets>on <profiling>off <python-debugging>off <python>3.14
<rtti>on <runtime-debugging>on <runtime-link>shared <stdlib>native
<strip>off <target-os>windows <testing.execute>on <threadapi>win32
<threading>multi <toolset-msvc:version>14.1 <toolset>msvc <variant>debug
<vectorize>off <visibility>hidden <warnings-as-errors>off <warnings>on
<windows-api>desktop <x-deduced-platform>x86_32
    matched: (empty)
    matched: (empty)
    - lzma                     : no  (cached) [2]
    - zstd                     : no  (cached) [2]


Tom
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