"xml2" install error in centos 6

[mrzung46]

hi, I'm trying to install "xml2" in my server but there is unsolvable error.
the output when I entered install.packages("xml") code is like below.

* installing *source* package ‘xml2’ ...
** package ‘xml2’ successfully unpacked and MD5 sums checked
Found pkg-config cflags and libs!
Using PKG_CFLAGS=-I/usr/include/libxml2
Using PKG_LIBS=-lxml2 -lz -lm
** libs
g++ -m64 -I/usr/include/R -DNDEBUG -I../inst/include -I/usr/include/libxml2 -I/usr/local/include -I"/usr/lib64/R/library/Rcpp/include" -I"/usr/lib64/R/library/BH/include"   -fpic  -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic  -c RcppExports.cpp -o RcppExports.o
g++ -m64 -I/usr/include/R -DNDEBUG -I../inst/include -I/usr/include/libxml2 -I/usr/local/include -I"/usr/lib64/R/library/Rcpp/include" -I"/usr/lib64/R/library/BH/include"   -fpic  -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic  -c connection.cpp -o connection.o
g++ -m64 -I/usr/include/R -DNDEBUG -I../inst/include -I/usr/include/libxml2 -I/usr/local/include -I"/usr/lib64/R/library/Rcpp/include" -I"/usr/lib64/R/library/BH/include"   -fpic  -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic  -c xml2_doc.cpp -o xml2_doc.o
xml2_doc.cpp: In function ‘Rcpp::IntegerVector xml_parse_options()’:
xml2_doc.cpp:129:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int i = 0; i < size; ++i) {
                     ^
g++ -m64 -I/usr/include/R -DNDEBUG -I../inst/include -I/usr/include/libxml2 -I/usr/local/include -I"/usr/lib64/R/library/Rcpp/include" -I"/usr/lib64/R/library/BH/include"   -fpic  -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic  -c xml2_init.cpp -o xml2_init.o
g++ -m64 -I/usr/include/R -DNDEBUG -I../inst/include -I/usr/include/libxml2 -I/usr/local/include -I"/usr/lib64/R/library/Rcpp/include" -I"/usr/lib64/R/library/BH/include"   -fpic  -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic  -c xml2_namespace.cpp -o xml2_namespace.o
g++ -m64 -I/usr/include/R -DNDEBUG -I../inst/include -I/usr/include/libxml2 -I/usr/local/include -I"/usr/lib64/R/library/Rcpp/include" -I"/usr/lib64/R/library/BH/include"   -fpic  -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic  -c xml2_node.cpp -o xml2_node.o
g++ -m64 -I/usr/include/R -DNDEBUG -I../inst/include -I/usr/include/libxml2 -I/usr/local/include -I"/usr/lib64/R/library/Rcpp/include" -I"/usr/lib64/R/library/BH/include"   -fpic  -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic  -c xml2_output.cpp -o xml2_output.o
xml2_output.cpp: In function ‘Rcpp::IntegerVector xml_save_options()’:
xml2_output.cpp:45:38: error: ‘XML_SAVE_WSNONSIG’ was not declared in this scope
       Rcpp::_["format_whitespace"] = XML_SAVE_WSNONSIG);
                                      ^
xml2_output.cpp: In function ‘int xml_write_callback(Rconnection, const char*, int)’:
xml2_output.cpp:61:67: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if ((write_size = R_WriteConnection(con, (void *) buffer, len)) != len) {
                                                                   ^
make: *** [xml2_output.o] Error 1
ERROR: compilation failed for package ‘xml2’
* removing ‘/usr/lib64/R/library/xml2’

The downloaded source packages are in
        ‘/tmp/RtmpOGlR0j/downloaded_packages’
Updating HTML index of packages in '.Library'
Making 'packages.html' ... done
Warning message:
In install.packages("xml2") :
  installation of package ‘xml2’ had non-zero exit status

And my R version is

R.version
               _                           
platform       x86_64-redhat-linux-gnu     
arch           x86_64                      
os             linux-gnu                   
system         x86_64, linux-gnu           
status                                     
major          3                           
minor          3.1                         
year           2016                        
month          06                          
day            21                          
svn rev        70800                       
language       R                           
version.string R version 3.3.1 (2016-06-21)
nickname       Bug in Your Hair  

Can I get any help from you to solve this problem?
This is very important to me.
Thx,

[jimhester]

Can you verify that this fixed the installation issues on centos 6 by running devtools::install_github("hadley/xml2")? Thanks!

[acoburn]

I encountered a similar issue with the xml2 library on CentOS 6, and I can confirm that installing the package using devtools worked.

[lohithbb]

I had this issue as well. But my version of R is 3.3.2.
I'm posting to verify that jimhester (Thank you!) solution does fix the problem. Also, just clarifying the dependency with the Rcpp package (there were issues with the compilers on the server due to build and release protocols).

I tried:

install.packages("xml2")

stdOut:

* installing *source* package ‘xml2’ ...
** package ‘xml2’ successfully unpacked and MD5 sums checked
Found pkg-config cflags and libs!
Using PKG_CFLAGS=-I/usr/include/libxml2
Using PKG_LIBS=-lxml2 -lz -lm
** libs
g++ -m64 -I/usr/include/R -DNDEBUG -I../inst/include -I/usr/include/libxml2 -I/usr/local/include -I"/home/rstudioserver/R/x86_64-redhat-linux-gnu-library/3.3/Rcpp/include" -I"/home/rstudioserver/R/x86_64-redhat-linux-gnu-library/3.3/BH/include"   -fpic  -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic  -c RcppExports.cpp -o RcppExports.o
g++ -m64 -I/usr/include/R -DNDEBUG -I../inst/include -I/usr/include/libxml2 -I/usr/local/include -I"/home/rstudioserver/R/x86_64-redhat-linux-gnu-library/3.3/Rcpp/include" -I"/home/rstudioserver/R/x86_64-redhat-linux-gnu-library/3.3/BH/include"   -fpic  -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic  -c connection.cpp -o connection.o
g++ -m64 -I/usr/include/R -DNDEBUG -I../inst/include -I/usr/include/libxml2 -I/usr/local/include -I"/home/rstudioserver/R/x86_64-redhat-linux-gnu-library/3.3/Rcpp/include" -I"/home/rstudioserver/R/x86_64-redhat-linux-gnu-library/3.3/BH/include"   -fpic  -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic  -c xml2_doc.cpp -o xml2_doc.o
xml2_doc.cpp: In function ‘Rcpp::IntegerVector xml_parse_options()’:
xml2_doc.cpp:129: warning: comparison between signed and unsigned integer expressions
g++ -m64 -I/usr/include/R -DNDEBUG -I../inst/include -I/usr/include/libxml2 -I/usr/local/include -I"/home/rstudioserver/R/x86_64-redhat-linux-gnu-library/3.3/Rcpp/include" -I"/home/rstudioserver/R/x86_64-redhat-linux-gnu-library/3.3/BH/include"   -fpic  -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic  -c xml2_init.cpp -o xml2_init.o
g++ -m64 -I/usr/include/R -DNDEBUG -I../inst/include -I/usr/include/libxml2 -I/usr/local/include -I"/home/rstudioserver/R/x86_64-redhat-linux-gnu-library/3.3/Rcpp/include" -I"/home/rstudioserver/R/x86_64-redhat-linux-gnu-library/3.3/BH/include"   -fpic  -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic  -c xml2_namespace.cpp -o xml2_namespace.o
g++ -m64 -I/usr/include/R -DNDEBUG -I../inst/include -I/usr/include/libxml2 -I/usr/local/include -I"/home/rstudioserver/R/x86_64-redhat-linux-gnu-library/3.3/Rcpp/include" -I"/home/rstudioserver/R/x86_64-redhat-linux-gnu-library/3.3/BH/include"   -fpic  -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic  -c xml2_node.cpp -o xml2_node.o
g++ -m64 -I/usr/include/R -DNDEBUG -I../inst/include -I/usr/include/libxml2 -I/usr/local/include -I"/home/rstudioserver/R/x86_64-redhat-linux-gnu-library/3.3/Rcpp/include" -I"/home/rstudioserver/R/x86_64-redhat-linux-gnu-library/3.3/BH/include"   -fpic  -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic  -c xml2_output.cpp -o xml2_output.o
xml2_output.cpp: In function ‘Rcpp::IntegerVector xml_save_options()’:
xml2_output.cpp:45: error: ‘XML_SAVE_WSNONSIG’ was not declared in this scope
xml2_output.cpp: In function ‘int xml_write_callback(Rconn*, const char*, int)’:
xml2_output.cpp:61: warning: comparison between signed and unsigned integer expressions
make: *** [xml2_output.o] Error 1
ERROR: compilation failed for package ‘xml2’
* removing ‘/home/rstudioserver/R/x86_64-redhat-linux-gnu-library/3.3/xml2’
* restoring previous ‘/home/rstudioserver/R/x86_64-redhat-linux-gnu-library/3.3/xml2’
Warning in install.packages :
  installation of package ‘xml2’ had non-zero exit status

My version:

> version
platform       x86_64-redhat-linux-gnu     
arch           x86_64                      
os             linux-gnu                   
system         x86_64, linux-gnu           
status                                     
major          3                           
minor          3.2                         
year           2016                        
month          10                          
day            31                          
svn rev        71607                       
language       R                           
version.string R version 3.3.2 (2016-10-31)
nickname       Sincere Pumpkin Patch   

In addition to running: devtools::install_github("hadley/xml2"), I had to reinstall Rcpp package (in addition to devtools) to get this work.

TLDR: try reinstalling Rcpp and devtools first, if it still does not work, then run: devtools::install_github("hadley/xml2")

[fangmn]

@lohithbb

u can try

sudo apt-get install libcurl4-openssl-dev libxml2-dev

[lohithbb]

@lohithbb

u can try

sudo apt-get install libcurl4-openssl-dev libxml2-dev

"apt-get" is not the package manager on centos 6 - you have to use yum (or install the packages manually with rpm -iVh. The problem was that this package was not available as part of centos repository and without access to the EPEL repository resolving this dependency was not possible.

You do not encounter this error in Centos 7 as these package dependencies are resolved automatically when R is installed.

My reply proposed a solution which does not require a package manager - it is distro-agnostic. See the TLDR at the bottom.

[sujayyaji]

This works. Even I had the same issue. Thank you

[sago1611]

@lohithbb your solution worked like a charm in my Ubuntu disto.

[elephanie]

@lohithbb
Thanks for the solution. It works for Ubuntu 18.04 + R 4.0.2.