a simple list of outputs i keep getting trying to install mongrel

gem list local output

$ gem list --local

*** LOCAL GEMS ***

abstract (1.0.0)
actionmailer (3.0.10)
actionpack (3.0.10)
activemodel (3.0.10)
activerecord (3.0.10)
activeresource (3.0.10)
activesupport (3.0.10)
arel (2.2.1, 2.0.10)
builder (3.0.0, 2.1.2)
bundler (1.0.18)
capistrano (2.8.0)
cgi_multipart_eof_fix (2.5.0)
daemons (1.1.4)
erubis (2.7.0, 2.6.6)
fastthread (1.0.7)
gem_plugin (0.2.3)
highline (1.6.2)
i18n (0.6.0, 0.5.0)
mail (2.3.0, 2.2.19)
mime-types (1.16)
mysql (2.8.1)
net-scp (1.0.4)
net-sftp (2.0.5)
net-ssh (2.2.0)
net-ssh-gateway (1.1.0)
polyglot (0.3.2)
rack (1.3.2, 1.2.3)
rack-mount (0.8.2, 0.6.14)
rack-test (0.6.1, 0.5.7)
rails (3.0.10)
railties (3.0.10)
rake (0.9.2 ruby)
rdoc (3.9.2)
thor (0.14.6)
treetop (1.4.10)
tzinfo (0.3.29)

the problem

$ gem install mongrel mongrel_cluster --include-dependencies
INFO:  `gem install -y` is now default and will be removed
INFO:  use --ignore-dependencies to install only the gems you list
Building native extensions.  This could take a while...
ERROR:  Error installing mongrel:
	ERROR: Failed to build gem native extension.

        /home/elearning/.rvm/rubies/ruby-1.9.2-p290/bin/ruby extconf.rb
checking for main() in -lc... yes
creating Makefile

make
gcc -I. -I/home/elearning/.rvm/rubies/ruby-1.9.2-p290/include/ruby-1.9.1/i686-linux -I/home/elearning/.rvm/rubies/ruby-1.9.2-p290/include/ruby-1.9.1/ruby/backward -I/home/elearning/.rvm/rubies/ruby-1.9.2-p290/include/ruby-1.9.1 -I. -D_FILE_OFFSET_BITS=64  -fPIC -O3 -ggdb -Wextra -Wno-unused-parameter -Wno-parentheses -Wpointer-arith -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long  -fPIC  -o http11.o -c http11.c
http11.c: In function ‘http_field’:
http11.c:77: error: ‘struct RString’ has no member named ‘ptr’
http11.c:77: error: ‘struct RString’ has no member named ‘len’
http11.c: In function ‘header_done’:
http11.c:172: error: ‘struct RString’ has no member named ‘ptr’
http11.c:172: error: ‘struct RString’ has no member named ‘ptr’
http11.c:172: error: ‘struct RString’ has no member named ‘ptr’
http11.c:174: error: ‘struct RString’ has no member named ‘ptr’
http11.c:176: error: ‘struct RString’ has no member named ‘ptr’
http11.c:177: error: ‘struct RString’ has no member named ‘len’
http11.c: In function ‘HttpParser_execute’:
http11.c:298: error: ‘struct RString’ has no member named ‘ptr’
http11.c:299: error: ‘struct RString’ has no member named ‘len’
make: *** [http11.o] Error 1


Gem files will remain installed in /home/elearning/.rvm/gems/ruby-1.9.2-p290/gems/mongrel-1.1.5 for inspection.
Results logged to /home/elearning/.rvm/gems/ruby-1.9.2-p290/gems/mongrel-1.1.5/ext/http11/gem_make.out
Building native extensions.  This could take a while...
ERROR:  Error installing mongrel_cluster:
	ERROR: Failed to build gem native extension.

        /home/elearning/.rvm/rubies/ruby-1.9.2-p290/bin/ruby extconf.rb
checking for main() in -lc... yes
creating Makefile

make
gcc -I. -I/home/elearning/.rvm/rubies/ruby-1.9.2-p290/include/ruby-1.9.1/i686-linux -I/home/elearning/.rvm/rubies/ruby-1.9.2-p290/include/ruby-1.9.1/ruby/backward -I/home/elearning/.rvm/rubies/ruby-1.9.2-p290/include/ruby-1.9.1 -I. -D_FILE_OFFSET_BITS=64  -fPIC -O3 -ggdb -Wextra -Wno-unused-parameter -Wno-parentheses -Wpointer-arith -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long  -fPIC  -o http11.o -c http11.c
http11.c: In function ‘http_field’:
http11.c:77: error: ‘struct RString’ has no member named ‘ptr’
http11.c:77: error: ‘struct RString’ has no member named ‘len’
http11.c: In function ‘header_done’:
http11.c:172: error: ‘struct RString’ has no member named ‘ptr’
http11.c:172: error: ‘struct RString’ has no member named ‘ptr’
http11.c:172: error: ‘struct RString’ has no member named ‘ptr’
http11.c:174: error: ‘struct RString’ has no member named ‘ptr’
http11.c:176: error: ‘struct RString’ has no member named ‘ptr’
http11.c:177: error: ‘struct RString’ has no member named ‘len’
http11.c: In function ‘HttpParser_execute’:
http11.c:298: error: ‘struct RString’ has no member named ‘ptr’
http11.c:299: error: ‘struct RString’ has no member named ‘len’
make: *** [http11.o] Error 1


Gem files will remain installed in /home/elearning/.rvm/gems/ruby-1.9.2-p290/gems/mongrel-1.1.5 for inspection.
Results logged to /home/elearning/.rvm/gems/ruby-1.9.2-p290/gems/mongrel-1.1.5/ext/http11/gem_make.out

uname output

$ uname -a
Linux elsrails 2.6.32-5-686 #1 SMP Mon Jun 13 04:13:06 UTC 2011 i686 GNU/Linux