`<local-visibility>hidden` in `build.jam` creates problems when building Boost

[pdimov]

The <local-visibility>hidden requirement in the global project requirements here

histogram/build.jam

Line 28 in 40add38

<local-visibility>hidden

causes the following warnings when trying to build Boost:

error: No best alternative for /C:/boost-git/master/libs/histogram/install-libraries-shared with <abi>ms <address-model>64 <architecture>x86 <asynch-exceptions>off <binary-format>pe <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>off <doxygen.doxproc.index>no <doxygen.processor>xsltproc <embed-manifest-via>linker <embed-manifest>on <exception-handling>on <extern-c-nothrow>off <format>html <inlining>full <known-warnings>hide <link>static <midl-robust>yes <midl-stubless-proxy>yes <optimization>speed <os>NT <pch>on <preserve-test-targets>on <profiling>off <python-debugging>off <python>3.9 <relevant>target-os <rtti>on <runtime-debugging>off <runtime-link>shared <stdlib>native <strip>off <target-os>windows <testing.execute>on <threadapi>win32 <threading>multi <toolset-msvc:version>14.5 <toolset>msvc <variant>release <vectorize>off <visibility>hidden <warnings-as-errors>off <warnings>on <windows-api>desktop <x-deduced-platform>x86_64
    no match: <local-visibility>hidden
    no match: <local-visibility>hidden <target-os>windows
    no match: <local-visibility>hidden <target-os>cygwin

I have no idea why, but when I remove it, the errors disappear.

I don't know why this requirement is even there; the library is header-only. Can it be removed? Or failing that, moved to test (if it's needed there for some reason.)

As a general rule global project requirements should be avoided, because they apply to all targets, which is rarely what one wants. It would be cleaner if the project in build.jam was just

project /boost/histogram ;

and the requirements were moved to test (and example if appropriate.)