[jira] [Assigned] (ARROW-1113) [C++] gflags EP build gets triggered (as a no-op) on subsequent calls to make or ninja build

["Wes McKinney (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-1113?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wes McKinney reassigned ARROW-1113:
-----------------------------------

    Assignee: Wes McKinney

> [C++] gflags EP build gets triggered (as a no-op) on subsequent calls to make or ninja build
> --------------------------------------------------------------------------------------------
>
>                 Key: ARROW-1113
>                 URL: https://issues.apache.org/jira/browse/ARROW-1113
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: C++
>    Affects Versions: 0.4.1
>            Reporter: Wes McKinney
>            Assignee: Wes McKinney
>
> Since switching to Ninja for builds I've noticed this rough edge. It doesn't seem to affect other EPs. [~xhochy] have you also seen this? 
> {code}
> $ ninja
> [4/45] Performing configure step for 'gflags_ep'
> -- Configuring done
> -- Generating done
> -- Build files have been written to: /home/wesm/code/arrow/cpp/test-build/gflags_ep-prefix/src/gflags_ep
> [5/45] Performing build step for 'gflags_ep'
> ninja: no work to do.
> [6/45] Performing install step for 'gflags_ep'
> [0/1] Install the project...
> -- Install configuration: "DEBUG"
> -- Up-to-date: /home/wesm/code/arrow/cpp/test-build/gflags_ep-prefix/src/gflags_ep/lib/cmake/gflags/gflags-config.cmake
> -- Up-to-date: /home/wesm/code/arrow/cpp/test-build/gflags_ep-prefix/src/gflags_ep/lib/cmake/gflags/gflags-config-version.cmake
> -- Up-to-date: /home/wesm/code/arrow/cpp/test-build/gflags_ep-prefix/src/gflags_ep/lib/cmake/gflags/gflags-targets.cmake
> -- Installing: /home/wesm/code/arrow/cpp/test-build/gflags_ep-prefix/src/gflags_ep/lib/cmake/gflags/gflags-targets-debug.cmake
> -- Up-to-date: /home/wesm/code/arrow/cpp/test-build/gflags_ep-prefix/src/gflags_ep/bin/gflags_completions.sh
> [8/45] Building CXX object CMakeFiles/arrow_objlib.dir/src/arrow/ipc/json-internal.cc.o
> <SNIP>
> {code}



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