[jira] [Work started] (HDFS-16654) Link OpenSSL lib for CMake deps pre-check

["Gautham Banasandra (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDFS-16654?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on HDFS-16654 started by Gautham Banasandra.
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> Link OpenSSL lib for CMake deps pre-check
> -----------------------------------------
>
>                 Key: HDFS-16654
>                 URL: https://issues.apache.org/jira/browse/HDFS-16654
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: libhdfs++
>    Affects Versions: 3.4.0
>         Environment: Windows 10
>            Reporter: Gautham Banasandra
>            Assignee: Gautham Banasandra
>            Priority: Major
>              Labels: libhdfscpp
>
> CMake checks whether the required components of OpenSSL are available prior to building HDFS native client - https://github.com/apache/hadoop/blob/fac895828f714b5587b57900d588acac69880c1e/hadoop-hdfs-project/hadoop-hdfs-native-client/src/CMakeLists.txt#L130
> {code}
> check_c_source_compiles("#include \"${OPENSSL_INCLUDE_DIR}/openssl/evp.h\"\nint main(int argc, char **argv) { return !EVP_aes_256_ctr; }" HAS_NEW_ENOUGH_OPENSSL)
> {code}
> This check compiles but fails while linking on Windows -
> {code}
> src.obj : error LNK2019: unresolved external symbol EVP_aes_256_ctr referenced in function main [H:\hadoop-hdfs-project\hadoop-hdfs-native-client\src\out\build\x64-Debug\CMakeFiles\CMakeTmp\cmTC_e391b.vcxproj]
> H:\hadoop-hdfs-project\hadoop-hdfs-native-client\src\out\build\x64-Debug\CMakeFiles\CMakeTmp\Debug\cmTC_e391b.exe : fatal error LNK1120: 1 unresolved externals [H:\hadoop-hdfs-project\hadoop-hdfs-native-client\src\out\build\x64-Debug\CMakeFiles\CMakeTmp\cmTC_e391b.vcxproj]
> {code}
> Thus, we need to link to the OpenSSL library prior to running this check. Please note that this check doesn't fail on Linux since CMake is able to pick it up from the standard location where libs are installed.



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