[jira] [Created] (ARROW-9412) [C++] Add non-BUNDLED dependencies to exported INSTALL_INTERFACE_LIBS of arrow_static and test that it works

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

Wes McKinney created ARROW-9412:
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             Summary: [C++] Add non-BUNDLED dependencies to exported INSTALL_INTERFACE_LIBS of arrow_static and test that it works
                 Key: ARROW-9412
                 URL: https://issues.apache.org/jira/browse/ARROW-9412
             Project: Apache Arrow
          Issue Type: Improvement
          Components: C++
            Reporter: Wes McKinney


As a companion project to ARROW-7605, we must document and test a workflow for statically linking with external static dependencies.

When a dependency is not built as BUNDLED, it can be added to "ARROW_STATIC_INSTALL_INTERFACE_LIBS" so that it's included in ArrowTargets-*.cmake. The third party project of course must configure the dependent CMake targets

Prior to the patch for ARROW-7605, toolchain libraries were added unconditionally to ARROW_STATIC_INSTALL_INTERFACE_LIBS whether BUNDLED or not (including our private jemalloc), creating a broken CMake "arrow_static" target. So this patch is to partially revert these changes to enable static linking with external toolchain libraries without breaking the BUNDLED static builds. Finally, this must be tested similar to cpp/examples/minimal_build/run_static.sh so that we can verify that each of the build/link scenarios are working correctly



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