[libxml-devel] error installing libxml-ruby v0.9.7 on Linux

[Stephen Bannasch]

$ uname -r
2.6.18-92.1.10.el5PAE

$ cat /etc/redhat-release
Red Hat Enterprise Linux Server release 5.2

mkmf.log:     http://gist.github.com/45885
gem_make.out: http://gist.github.com/45886

$ sudo 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/local/bin/ruby extconf.rb install libxml-ruby
checking for socket() in -lsocket... no
checking for gethostbyname() in -lnsl... no
checking for atan() in -lm... no
checking for atan() in -lm... 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/local/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
  extconf failure: need libm


Gem files will remain installed in 
/usr/local/lib/ruby/gems/1.8/gems/libxml-ruby-0.9.7 for inspection.
Results logged to 
/usr/local/lib/ruby/gems/1.8/gems/libxml-ruby-0.9.7/ext/libxml/gem_make.out