In file included from /home/ly/anaconda3/include/libxml2/libxml/parser.h:810:0

In file included from /home/ly/anaconda3/include/libxml2/libxml/parser.h:810:0,
 from /home/ly/llvm/tools/clang/tools/c-index-test/c-index-test.c:15:

/home/ly/anaconda3/include/libxml2/libxml/encoding.h:31:26: fatal error: unicode/ucnv.h: 没有那个文件或目录

今天在ubuntu下编译安装clang时出现上述问题，个人anaconda3所在的目录和clang编译所在的目录同样

在Ubuntu Eclipse libxml2 error : fatal error: libxml/xmlversion.h: No such file or directory这里找到了答案， 

ubuntu下安装libxml2-dev 和 libxslt1-dev     

sudo apt-get install libxml2-dev libxslt1-dev  

解决了问题 ，若是是其余版本能够用

yum install libxml-develyum install libxml-devel