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Posted to jira@arrow.apache.org by "Ian Cook (Jira)" <ji...@apache.org> on 2021/03/11 21:12:00 UTC

[jira] [Commented] (ARROW-11938) [R] Enable R build process to find locally built C++ library on Windows

    [ https://issues.apache.org/jira/browse/ARROW-11938?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17299872#comment-17299872 ] 

Ian Cook commented on ARROW-11938:
----------------------------------

See the {{find_local_source}} function in {{r/inst/linuxlibs.R}} which handles this situation on non-Windows systems, but note that that attempts to build the C++ library, not just find it if it’s already built, and we probably do not want to attempt to script C++ library build on users’ Windows environments.

> [R] Enable R build process to find locally built C++ library on Windows
> -----------------------------------------------------------------------
>
>                 Key: ARROW-11938
>                 URL: https://issues.apache.org/jira/browse/ARROW-11938
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: R
>            Reporter: Ian Cook
>            Priority: Major
>
> Currently, {{configure.win}} and {{tools/winlibs.R}} have two ways of finding the Arrow C++ library:
>  # If {{RWINLIB_LOCAL}} is set, it gets it from that zip file
>  # If not, it downloads it
> Enable and document a third option for the case when the C++ library has been built locally. This will enable R package developers using Windows machines to make changes to code in the C++ library, build and install it, and then build the R package using it.



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