[jira] [Created] (IMPALA-12100) native-toolchain's gflags build use REGISTER_INSTALL_PREFIX=Off

["Joe McDonnell (Jira)" <ji...@apache.org>]

Joe McDonnell created IMPALA-12100:
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             Summary: native-toolchain's gflags build use REGISTER_INSTALL_PREFIX=Off
                 Key: IMPALA-12100
                 URL: https://issues.apache.org/jira/browse/IMPALA-12100
             Project: IMPALA
          Issue Type: Bug
          Components: Infrastructure
    Affects Versions: Impala 4.3.0
            Reporter: Joe McDonnell


When building the native-toolchain, the Kudu build failed with odd messages about gflags:
{noformat}
[  8%] Linking CXX executable ../../../bin/protoc-gen-insertions
/home/ubuntu/workspace/ubuntu-16.04-native-toolchain/native-toolchain/source/kudu/kudu-345fd44ca3/thirdparty/src/glog-0.6.0/src/logging.cc:116: error: undefined reference to 'google::FlagRegisterer::FlagRegisterer<bool>(char const*, char const*, char const*, bool*, bool*, bool)'{noformat}
It seems that glog was built with Impala's gflags rather than Kudu's thirdparty gflags. Impala has some patches that modify FlagRegisterer.

Why would it find Impala's gflags? Well, gflags has a CMake option REGISTER_INSTALL_PREFIX, which defaults to true. When true, it installs something in the .cmake directory in the user's home directory. From the gflags build log:
{noformat}
-- Installing: /home/ubuntu/.cmake/packages/gflags/2407f150c75a144f5e6c9e90127cb6c1{noformat}
This seems to be picked up by Kudu's thirdparty build, leading to the error. We should set REGISTER_INSTALL_PREFIX=OFF for gflags.



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