!30 【WIP】【LLVM平行宇宙】Support build with clang

From: @luofeng14 
Reviewed-by: @wenwj0 
Signed-off-by: @wenwj0

hadoop-3.1.spec

@@ -12,7 +12,7 @@
 %define _binaries_in_noarch_packages_terminate_build 0
 Name:   hadoop-3.1
 Version: 3.1.4
-Release: 6
+Release: 7
 Summary: A software platform for processing vast amounts of data
 # The BSD license file is missing
 # https://issues.apache.org/jira/browse/HADOOP-9849
@@ -299,6 +299,12 @@ mvn install:install-file -DgroupId=orn.fusesource.hawtjni -DartifactId=hawtjni-r
 %mvn_file :%{real_name}-common::tests: %{real_name}/%{real_name}-common
 
 %build
+if [[ "%{?toolchain}" == "clang" ]]
+then
+  export CXXFLAGS="$CXXFLAGS -mcpu=generic+Crc -Wno-reserved-user-defined-literal"
+  export CFLAGS="$CFLAGS -mcpu=generic+Crc -Wno-reserved-user-defined-literal"
+fi
+
 mvn -Dsnappy.lib=/usr/lib64 -Dbundle.snappy -Dcontainer-executor.conf.dir=%{_sysconfdir}/%{real_name} -Pdist,native -DskipTests -DskipIT -Dmaven.javadoc.skip=true package
 
 %install
@@ -1114,6 +1120,9 @@ fi
 %config(noreplace) %{_sysconfdir}/%{real_name}/container-executor.cfg
 
 %changelog
+* Wed Oct 11 2023 luofeng <luofeng13@huawei.com> - 3.1.4-7
+- support clang build
+
 * Fri Jul 21 2023 wenweijian <wenweijian2@huawei.com> - 3.1.4-6
 - compatiable with gcc12