Something

Configuring extensions
checking whether to enable LIBXML support... yes
checking libxml2 install dir... /usr/local/include/libxml2/libxml
checking for xml2-config path... /usr/local/bin/xml2-config
checking whether libxml build works... no
configure: error: build test failed.  Please check the config.log for details.
# tail -n 30 config.log
configure:18316: checking whether to enable versioning
configure:18332: checking for location of ICU headers and libraries
configure:18370: checking for ICU 3.4 or greater
configure:18530: checking whether to enable LIBXML support
configure:18577: checking libxml2 install dir
configure:18606: checking for xml2-config path
configure:18763: checking whether libxml build works
configure:18790: gcc -o conftest -g -O2   -R/usr/local/lib -L/usr/local/lib conftest.c

         -lm  -lm -licui18n -licuuc -licudata -lm -licuio -lxml2 -lz -lm 1>&5
/usr/local/lib/libicui18n.so.36.0: warning: strcpy() is almost always misused, please use strlcpy()
/usr/local/lib/libicui18n.so.36.0: warning: sprintf() is often misused, please use snprintf()
/usr/local/lib/libicui18n.so.36.0: warning: strcat() is almost always misused, please use strlcat()
/usr/local/lib/libicuio.so.36.0: undefined reference to `std::basic_ostream<char, std::char_traits<char> >::write(char const*, long)'
/usr/local/lib/libicuio.so.36.0: undefined reference to `std::basic_istream<char, std::char_traits<char> >::putback(char)'
/usr/local/lib/libicuio.so.36.0: undefined reference to `std::ios_base::Init::Init[in-charge]()'
/usr/local/lib/libicuio.so.36.0: undefined reference to `std::ios_base::Init::~Init [in-charge]()'
/usr/local/lib/libicuio.so.36.0: undefined reference to `std::basic_istream<char, std::char_traits<char> >::get()'
collect2: ld returned 1 exit status
configure: failed program was:
#line 18779 "configure"
#include "confdefs.h"


    char xmlInitParser();
    int main() {
      xmlInitParser();
      return 0;
    }