Tomasz Cheda created ARROW-8032:
-----------------------------------
Summary: CPP example parquet-arrow project includes broken
FindParquet.cmake
Key: ARROW-8032
URL: https://issues.apache.org/jira/browse/ARROW-8032
Project: Apache Arrow
Issue Type: Bug
Components: C++
Affects Versions: 1.0.0
Environment: NA
Reporter: Tomasz Cheda
The example project at
[https://github.com/apache/arrow/tree/master/cpp/examples/parquet/parquet-arrow/cmake_modules]
includes a broken version of FindParquet.cmake (
[https://github.com/apache/arrow/blob/master/cpp/examples/parquet/parquet-arrow/cmake_modules/FindParquet.cmake]
)
The other module is, correctly, a link to FindArrow.cmake in
[https://github.com/apache/arrow/tree/master/cpp/cmake_modules]
For the curious, the broken part is assuming that FindPkgConfig variables will
be set if the module is found - this can be false if the include directory is
/usr/include. This can be controlled by one of FindPkgConfig's config
variables, but the default behaviour changes as of CMake 3.10. It then
erroneously reports that Parquet has not been found.
This is not a major bug, but I based my build files off of those in the example
directory and it took me a LONG time to figure out the error. It can be really
confusing for new users and is simple to fix.
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