[ARROW-11836] Target libarrow_bundled_dependencies.a is not alreay created but is already required.

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0
• Fix Version/s: 4.0.0
• Component/s: C++
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/27684
• Assignee: Tao He
• Reporter: Tao He
• Created: 02/Mar/21 13:40
• Updated: 11/Jan/23 08:22
• Resolved: 04/Mar/21 05:13

Description

When ``-DARROW_BUILD_STATIC=ON``, all build dependencies built as static libraries by the Arrow build system will be merged together to create a static library ``arrow_bundled_dependencies``.
 
But that is only true when there are indeed some dependencies, i.e., when ``ARROW_BUNDLED_STATIC_LIBS`` is not empty [1]. It could be empty when we just enable some of features when building arrow (e.g., just the arrow core).
 
However the target is unconditionally required by the target ``arrow_static`` [2]. That makes the staticly-built arrow libs cannot be used with cmake.
 
[1]: https://github.com/apache/arrow/blob/master/cpp/src/arrow/CMakeLists.txt#L523
[2]: https://github.com/apache/arrow/blob/master/cpp/src/arrow/ArrowConfig.cmake.in#L74

Issue Links

• links to: GitHub Pull Request #9622