Re: [release] Boost 1.92 RC1 available

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]
>>>
>>>
>>> Other than that, things look good on Windows/Visual Studio:
>>>
>>> toolset     arch    compile Link    Execute
>>> msvc-14.1   32      X       X       X
>>> msvc-14.1   64      X       X       X
>>> msvc-14.2   32      X       X       X
>>> msvc-14.2   64      X       X       X
>>> msvc-14.3   32      X       X       X
>>> msvc-14.3   64      X       X       X
>>> msvc-14.5   32      X       X       X
>>> msvc-14.5   64      X       X       X
>>>
>>> Compile means that the b2 command completed without errors
>>> Link means that visual studio was able to link a sample executable to a
>>> library (libboost_thread-vcXXX-mt[-gd]-1_XX.lib) generated
>>> Execute means that the linked program executed without errors.
>>>
>>> Logs here:
>>> https://gist.github.com/teeks99/39e711e05d42fe58959360a1b3e42c7f
>>>
>>> Tom
>>>
>>> On Thu, Aug 6, 2026 at 9:41 AM Ion Gaztañaga via Boost <
>>> [email protected]> wrote:
>>>
>>>> The first release candidates for the 1.92.0 release are now available
>> at:
>>>> https://archives.boost.io/release/1.92.0/source/
>>>>
>>>> The SHA256 checksums are as follows:
>>>>
>>>> c4a3b310ddd2472416e091067166b0713be97c63f38c212c484ada022fd296ce
>>>> boost_1_92_0_rc1.tar.gz
>>>>
>>>> 57f2ded2390068a44d88748425067e01a8c285257a4d9611d04ade9d8ec68615
>>>> boost_1_92_0_rc1.7z
>>>>
>>>> c46baee75ed4b558cf6553630d0615a147ed582812917b57e6f0839d1954549f
>>>> boost_1_92_0_rc1.zip
>>>>
>>>> 5c1d40cb8e19adbf740a4ec2da35b3e58f3f5804b1dce44deb53df72193cbc6c
>>>> boost_1_92_0_rc1.tar.bz2
>>>>
>>>> As always, the release managers would appreciate it if you download the
>>>> candidate of your choice and give building it a try. Please report both
>>>> success and failure, and anything else that is noteworthy.
>>>>
>>>> -- The Release managers
>>>> _______________________________________________
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>>>>
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>>>>
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>>
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