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The CMake  configuration program has a COMPILATION_COMMENT_SERVER  option that permits a comment to be specified when building MySQL. This variable contains the value of that comment. (Prior to MySQL 8.0.14, version_comment  is set by the COMPILATION_COMMENT  option.) See Section 2.9.7, “MySQL Source-Configuration Options” . 

• version_compile_machine 

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The type of the server binary. 

• version_compile_os 

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The type of operating system on which MySQL was built. 

• version_compile_zlib 

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The version of the compiled-in zlib  library. 

• wait_timeout 

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