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https://issues.apache.org/jira/browse/HDFS-9380?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15001099#comment-15001099
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Haohui Mai commented on HDFS-9380:
----------------------------------

bq. CMakeFile.txt appears to actually do the work of setting those vars or even 
determining where protobuf is installed.

In the current HDFS-8707 branch, the variables are being defined in 
FindProtobuf.cmake, so as the OpenSSL one.

Please check https://cmake.org/cmake/help/v3.2/module/FindProtobuf.html for 
more details.

I'll file a jira to fix the OpenSSL configuration.


> HDFS-8707 builds are failing with protobuf directories as undef
> ---------------------------------------------------------------
>
>                 Key: HDFS-9380
>                 URL: https://issues.apache.org/jira/browse/HDFS-9380
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: hdfs-client
>            Reporter: Bob Hansen
>            Assignee: Haohui Mai
>
> See recent builds in HDFS-9320 and HDFS-9103.
> {code}
>      [exec] CMake Error: The following variables are used in this project, 
> but they are set to NOTFOUND.
>      [exec] Please set them or make sure they are set and tested correctly in 
> the CMake files:
>      [exec] PROTOBUF_LIBRARY (ADVANCED)
>      [exec]     linked by target "protoc-gen-hrpc" in directory 
> /testptch/hadoop/hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/proto
>      [exec]     linked by target "inputstream_test" in directory 
> /testptch/hadoop/hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/tests
>      [exec]     linked by target "remote_block_reader_test" in directory 
> /testptch/hadoop/hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/tests
>      [exec]     linked by target "rpc_engine_test" in directory 
> /testptch/hadoop/hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/tests
>      [exec] PROTOBUF_PROTOC_LIBRARY (ADVANCED)
>      [exec]     linked by target "protoc-gen-hrpc" in directory 
> /testptch/hadoop/hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/proto
> {code}



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