[jira] [Updated] (ARROW-747) [C++] Fix spurious warning caused by passing dl to add_dependencies

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

     [ https://issues.apache.org/jira/browse/ARROW-747?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wes McKinney updated ARROW-747:
-------------------------------
    Summary: [C++] Fix spurious warning caused by passing dl to add_dependencies  (was: [C++] Link correctly to libdl on Linux)

> [C++] Fix spurious warning caused by passing dl to add_dependencies
> -------------------------------------------------------------------
>
>                 Key: ARROW-747
>                 URL: https://issues.apache.org/jira/browse/ARROW-747
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: C++
>            Reporter: Wes McKinney
>             Fix For: 0.3.0
>
>
> There is a potentially confusing warning from arrow/io on Linux:
> {code}
> -- Configuring done
> CMake Warning (dev) at cmake_modules/BuildUtils.cmake:98 (add_dependencies):
>   Policy CMP0046 is not set: Error on non-existent dependency in
>   add_dependencies.  Run "cmake --help-policy CMP0046" for policy details.
>   Use the cmake_policy command to set the policy and suppress this warning.
>   The dependency target "dl" of target "arrow_io_objlib" does not exist.
> Call Stack (most recent call first):
>   src/arrow/io/CMakeLists.txt:85 (ADD_ARROW_LIB)
> This warning is for project developers.  Use -Wno-dev to suppress it.
> -- Generating done
> -- Build files have been written to: /home/wesm/code/arrow/cpp/test-build
> {code}
> I believe you may need to link to libdl on OS X



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