CentOS gem install of libxml-ruby is failing

[Xeno Campanoli]

I'm trying to do a simple gem install so I can validate some XML files
for a project, and the gem install fails as follows on my CentOS system:


[root@miller ~]# uname -a
Linux miller 2.6.18-53.1.4.el5 #1 SMP Fri Nov 30 00:45:16 EST 2007 i686
athlon i386 GNU/Linux
[root@miller ~]# gem install libxml-ruby
Building native extensions. This could take a while...
ERROR: Error installing libxml-ruby:
ERROR: Failed to build gem native extension.

/usr/bin/ruby extconf.rb install libxml-ruby
checking for socket() in -lsocket... no
checking for gethostbyname() in -lnsl... yes
checking for atan() in -lm... no
checking for atan() in -lm... yes
checking for inflate() in -lz... yes
checking for iconv_open() in -liconv... no
checking for libiconv_open() in -liconv... no
checking for libiconv_open() in -llibiconv... no
checking for iconv_open() in -llibiconv... no
checking for iconv_open() in -lc... yes
checking for xmlParseDoc() in -lxml2... no
checking for xmlParseDoc() in -llibxml2... no
checking for /opt/lib() in -lxml2... no
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers. Check the mkmf.log file for more
details. You may need configuration options.

Provided configuration options:
--with-opt-dir
--without-opt-dir
--with-opt-include
--without-opt-include=${opt-dir}/include
--with-opt-lib
--without-opt-lib=${opt-dir}/lib
--with-make-prog
--without-make-prog
--srcdir=.
--curdir
--ruby=/usr/bin/ruby
--with-iconv-dir
--without-iconv-dir
--with-iconv-include
--without-iconv-include=${iconv-dir}/include
--with-iconv-lib
--without-iconv-lib=${iconv-dir}/lib
--with-xml2-dir
--without-xml2-dir
--with-xml2-include
--without-xml2-include=${xml2-dir}/include
--with-xml2-lib
--without-xml2-lib=${xml2-dir}/lib
--with-zlib-dir
--without-zlib-dir
--with-zlib-include
--without-zlib-include=${zlib-dir}/include
--with-zlib-lib
--without-zlib-lib=${zlib-dir}/lib
--with-socketlib
--without-socketlib
--with-nsllib
--without-nsllib
--with-mlib
--without-mlib
--with-mlib
--without-mlib
--with-zlib
--without-zlib
--with-iconvlib
--without-iconvlib
--with-iconvlib
--without-iconvlib
--with-libiconvlib
--without-libiconvlib
--with-libiconvlib
--without-libiconvlib
--with-clib
--without-clib
--with-xml2lib
--without-xml2lib
--with-libxml2lib
--without-libxml2lib
--with-xml2lib
--without-xml2lib
extconf failure: need libxml2.

Install the library or try one of the following options to
extconf.rb:

--with-xml2-dir=/path/to/libxml2
--with-xml2-lib=/path/to/libxml2/lib
--with-xml2-include=/path/to/libxml2/include



Gem files will remain installed in
/usr/lib/ruby/gems/1.8/gems/libxml-ruby-0.5.4 for inspection.
Results logged to
/usr/lib/ruby/gems/1.8/gems/libxml-ruby-0.5.4/ext/libxml/gem_make.out
---snip---
The only so I seem to have is:

/usr/lib/libxml2.so.2.6.26

Presumably there should be a symbolic link or something, but whatever is
missing,...If I go ln -s /usr/lib/libxml2.so.2.6.26 /usr/lib/libxml2.so,
then...
Nope, it fails the same way...
I also tried:

Gem files will remain installed in
/usr/lib/ruby/gems/1.8/gems/libxml-ruby-0.5.4 for inspection.
Results logged to
/usr/lib/ruby/gems/1.8/gems/libxml-ruby-0.5.4/ext/libxml/gem_make.out
[root@miller ~]# gem install --with-xml2-dir=/usr/lib libxml-ruby
ERROR: While executing gem ... (OptionParser::InvalidOption)
invalid option: --with-xml2-dir=/usr/lib
[root@miller ~]# gem install libxml-ruby --with-xml2-dir=/usr/lib
ERROR: While executing gem ... (OptionParser::InvalidOption)
invalid option: --with-xml2-dir=/usr/lib
[root@miller ~]# gem --with-xml2-dir=/usr/libinstall libxml-ruby
ERROR: Invalid option: --with-xml2-dir=/usr/libinstall. See 'gem --help'.
[root@miller ~]# gem --with-xml2-dir=/usr/lib install libxml-ruby
ERROR: Invalid option: --with-xml2-dir=/usr/lib. See 'gem --help'.
[root@miller ~]#
----snip----
xc

 

[Joel VanderWerf]

I'm trying to do a simple gem install so I can validate some XML files
for a project, and the gem install fails as follows on my CentOS system:

Do you have the libxml development rpm installed?

That's the first thing I'd check when these errors come up:

 

[Xeno Campanoli]

Do you have the libxml development rpm installed?

That's the first thing I'd check when these errors come up:

Thank you. That appears to have been what I needed. I installed
libxml-devel and then retried the gem and it appears to have finished
normally, with gem check showing no problems.

xc