[jira] [Created] (HADOOP-17196) Compilation warnings caused by non-standard flags

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

Gautham Banasandra created HADOOP-17196:
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             Summary: Compilation warnings caused by non-standard flags
                 Key: HADOOP-17196
                 URL: https://issues.apache.org/jira/browse/HADOOP-17196
             Project: Hadoop Common
          Issue Type: Bug
          Components: build
    Affects Versions: 3.1.3
         Environment: Windows 10 Pro 64-bit
            Reporter: Gautham Banasandra


The C/C++ language standard is not specified in a cross-compiler manner. Even though it's as straight forward as passing -std as compiler arguments, not all the values are supported by all the compilers. For example, compilation with the Visual C++ compiler on Windows with -std=gnu99 flag causes the following warning -
{code:java}
cl : command line warning D9002: ignoring unknown option '-std=gnu99' [Z:\hadoop-hdfs-project\hadoop-hdfs-native-client\target\native\main\native\libhdfs-examples\hdfs_read.vcxproj] {code}
Thus, we need to use the appropriate flags provided by CMake to specify the C/C++ standards so that it is compiler friendly.



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