Re: [Buildroot] [PATCH 1/1] package/boost: enable system on host

["Yann E. MORIN" <yann.morin.1998@free.fr>]

Fabrice, All,

On 2022-01-14 18:18 +0100, Fabrice Fontaine spake thusly:
> boost system (which provides boost asio) is needed by host-riscv-isa-sim
> since its addition in commit ea033cecf990ed3f86619647523a9ad2ccb09adb:
> 
> configure: error: Could not find a version of the Boost::Asio library!
> 
> Fixes:
>  - http://autobuild.buildroot.org/results/6c33a66386ab2171454d8ea8c1bd17a5582e21dd
> 
> Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
> ---
>  package/boost/boost.mk | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/package/boost/boost.mk b/package/boost/boost.mk
> index 6d1046e9a2..2d2a8fb311 100644
> --- a/package/boost/boost.mk
> +++ b/package/boost/boost.mk
> @@ -17,7 +17,7 @@ HOST_BOOST_FLAGS = --without-icu --with-toolset=gcc \
>  	--without-libraries=$(subst $(space),$(comma),atomic chrono context \
>  	contract container coroutine date_time exception fiber filesystem graph \
>  	graph_parallel iostreams json locale log math mpi nowide program_options \
> -	python random serialization stacktrace system test thread timer \
> +	python random serialization stacktrace test thread timer \
>  	type_erasure wave)

I was wondering why we need to disable those, and the original commit
log is not very explicit about why this is so (429ffbd2253 boost: add
host variant), and the comment is not very helpful either...

So I did a test: remove all those exclusion (just exclude python [0]),
and build just host-boost (it has no dependency):

    master      : 54s
    no-exclusion: 2min 38s

So yes, this is a big increase. But considering that we have no way for
host packages to express dependencies on Boost features, I wonder if we
should not just build the whole stuff. For example, packages in a
br2-external have no way to say so...

Anyway, in the meantime: applied to master, thanks.

[0] building the Boost python module would require the python development
    files be installed on the host, or that we depend on host-python{,3},
    neither of which are acceptable

Regards,
Yann E. MORIN.

>  BOOST_WITHOUT_FLAGS += $(if $(BR2_PACKAGE_BOOST_ATOMIC),,atomic)
> -- 
> 2.34.1
> 
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