[jira] [Created] (ARROW-4873) [C++] ARROW_DEPENDENCY_SOURCE should not be overridden to CONDA if ARROW_PACKAGE_PREFIX is set by user

[Wes McKinney (JIRA)]

Wes McKinney created ARROW-4873:
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             Summary: [C++] ARROW_DEPENDENCY_SOURCE should not be overridden to 
CONDA if ARROW_PACKAGE_PREFIX is set by user
                 Key: ARROW-4873
                 URL: https://issues.apache.org/jira/browse/ARROW-4873
             Project: Apache Arrow
          Issue Type: Bug
          Components: C++
            Reporter: Wes McKinney
            Assignee: Wes McKinney
             Fix For: 0.13.0


I use conda to manage Python dependencies but keep my C++ toolchain in a 
separate directory. This organizational scheme is incompatible with the new 
options after the CMake refactor

I think if you pass {{-DARROW_PREFIX_PATH=$MY_CPP_TOOLCHAIN}} then this should 
not be overridden with {{$CONDA_PREFIX}}



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