4
Wirklich schnell, ich bin bewusst, eine similar question. Das Folgen der bestbewerteten Antwort funktioniert jedoch nicht. Ich habe mein System und das Terminal bereits neu gestartet, aber ohne Erfolg.Nokogiri 1.5.2 nicht auf Ubuntu 11.10 installieren
Aus irgendeinem Grund erkennt Nokogiri nicht, dass ich libxslt1-dev installiert habe, obwohl ich es explizit installierte, beide mit sudo apt-get install libxslt-dev und sudo apt-get install libxslt1-dev.
Hier ist der Ausgang; vermisse ich noch etwas?
$ gem install nokogiri -v '1.5.2'
Building native extensions. This could take a while...
ERROR: Error installing nokogiri:
ERROR: Failed to build gem native extension.
~/.rvm/rubies/ruby-1.9.3-p125/bin/ruby extconf.rb
extconf.rb:10: Use RbConfig instead of obsolete and deprecated Config.
checking for libxml/parser.h... yes
checking for libxslt/xslt.h... yes
checking for libexslt/exslt.h... yes
checking for iconv_open() in iconv.h... no
checking for iconv_open() in -liconv... yes
checking for xmlParseDoc() in -lxml2... yes
checking for xsltParseStylesheetDoc() in -lxslt... no
-----
libxslt is missing. please visit
http://nokogiri.org/tutorials/installing_nokogiri.html for help
with installing dependencies.
-----
*** 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:
List of options
Gem files will remain installed in ~/.rvm/gems/[email protected]/gems/nokogiri-1.5.2 for inspection.
Results logged to ~/.rvm/gems/[email protected]/gems/nokogiri-1.5.2/ext/nokogiri/gem_make.out
EDIT: Bei genauerem Hinsehen erkenne ich, dass das Installationsprogramm erkennt, dass ich libxslt1-dev installiert, aber es ist einer der Tests fehlschlägt. Habe ich etwas falsch mit der Installation gemacht?
EDIT 2: Ich versuche capybara mit bundle install zu installieren, und unter seinen verschiedenen Abhängigkeiten, nokogiri und selenium-webdriver können libxslt nicht finden, und deshalb kann ich nicht capybara verwenden.
EDIT 3: Hier ist die Fehlermeldung aus der Datei mkmf.log; lass es mich wissen, wenn du den Rest brauchst.
--------------------
find_library: checking for xsltParseStylesheetDoc() in -lxslt... -------------------- no
"gcc -o conftest -I${HOME}/.rvm/rubies/ruby-1.9.3-p125/include/ruby-1.9.1/x86_64-linux -I${HOME}/.rvm/rubies/ruby-1.9.3-p125/include/ruby-1.9.1/ruby/backward -I${HOME}/.rvm/rubies/ruby-1.9.3-p125/include/ruby-1.9.1 -I. -I/opt/local/include/libxml2 -I/usr/local/include/libxml2 -I${HOME}/.rvm/rubies/ruby-1.9.3-p125/include/libxml2 -I/opt/local/include -I/usr/local/include -I${HOME}/.rvm/rubies/ruby-1.9.3-p125/include -I/usr/include -I/usr/include/libxml2 -I${HOME}/.rvm/usr/include -O3 -ggdb -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wimplicit-function-declaration -fPIC -g -DXP_UNIX -O3 -Wall -Wcast-qual -Wwrite-strings -Wconversion -Wmissing-noreturn -Winline conftest.c -L. -L${HOME}/.rvm/rubies/ruby-1.9.3-p125/lib -Wl,-R${HOME}/.rvm/rubies/ruby-1.9.3-p125/lib -L/opt/local/lib -Wl,-R/opt/local/lib -L/usr/local/lib -Wl,-R/usr/local/lib -L${HOME}/.rvm/rubies/ruby-1.9.3-p125/lib -Wl,-R${HOME}/.rvm/rubies/ruby-1.9.3-p125/lib -L/usr/lib -Wl,-R/usr/lib -L${HOME}/.rvm/usr/lib -Wl,-R${HOME}/.rvm/usr/lib -L. -rdynamic -Wl,-export-dynamic -lxml2 -liconv -Wl,-R -Wl,${HOME}/.rvm/rubies/ruby-1.9.3-p125/lib -L${HOME}/.rvm/rubies/ruby-1.9.3-p125/lib -lruby -lxslt -lxml2 -liconv -lpthread -lrt -ldl -lcrypt -lm -lc "
conftest.c: In function ‘t’:
conftest.c:5:53: error: ‘xsltParseStylesheetDoc’ undeclared (first use in this function)
conftest.c:5:53: note: each undeclared identifier is reported only once for each function it appears in
conftest.c:5:28: warning: variable ‘p’ set but not used [-Wunused-but-set-variable]
checked program was:
/* begin */
1: #include "ruby.h"
2:
3: /*top*/
4: int main() {return 0;}
5: int t() { void ((*volatile p)()); p = (void ((*)()))xsltParseStylesheetDoc; return 0; }
/* end */
"gcc -o conftest -I${HOME}/.rvm/rubies/ruby-1.9.3-p125/include/ruby-1.9.1/x86_64-linux -I${HOME}/.rvm/rubies/ruby-1.9.3-p125/include/ruby-1.9.1/ruby/backward -I${HOME}/.rvm/rubies/ruby-1.9.3-p125/include/ruby-1.9.1 -I. -I/opt/local/include/libxml2 -I/usr/local/include/libxml2 -I${HOME}/.rvm/rubies/ruby-1.9.3-p125/include/libxml2 -I/opt/local/include -I/usr/local/include -I${HOME}/.rvm/rubies/ruby-1.9.3-p125/include -I/usr/include -I/usr/include/libxml2 -I${HOME}/.rvm/usr/include -O3 -ggdb -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wimplicit-function-declaration -fPIC -g -DXP_UNIX -O3 -Wall -Wcast-qual -Wwrite-strings -Wconversion -Wmissing-noreturn -Winline conftest.c -L. -L${HOME}/.rvm/rubies/ruby-1.9.3-p125/lib -Wl,-R${HOME}/.rvm/rubies/ruby-1.9.3-p125/lib -L/opt/local/lib -Wl,-R/opt/local/lib -L/usr/local/lib -Wl,-R/usr/local/lib -L${HOME}/.rvm/rubies/ruby-1.9.3-p125/lib -Wl,-R${HOME}/.rvm/rubies/ruby-1.9.3-p125/lib -L/usr/lib -Wl,-R/usr/lib -L${HOME}/.rvm/usr/lib -Wl,-R${HOME}/.rvm/usr/lib -L. -rdynamic -Wl,-export-dynamic -lxml2 -liconv -Wl,-R -Wl,${HOME}/.rvm/rubies/ruby-1.9.3-p125/lib -L${HOME}/.rvm/rubies/ruby-1.9.3-p125/lib -lruby -lxslt -lxml2 -liconv -lpthread -lrt -ldl -lcrypt -lm -lc "
conftest.c: In function ‘t’:
conftest.c:5:1: warning: implicit declaration of function ‘xsltParseStylesheetDoc’ [-Wimplicit-function-declaration]
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.6.0'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.6.15'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.6.0'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `xm[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.6.17'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.6.0'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.6.27'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.6.0'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.6.0'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.6.0'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.6.0'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.6.25'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.5.4'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.6.5'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]LIBXML2_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.6.0'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.5.4'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.6.17'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.5.6'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.6.0'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.6.17'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.6.0'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.6.0'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.6.0'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.6.3'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.6.0'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.6.5'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.6.0'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
/usr/lib/libxslt.so: undefined reference to `[email protected]_2.4.30'
collect2: ld returned 1 exit status
checked program was:
/* begin */
1: #include "ruby.h"
2:
3: /*top*/
4: int main() {return 0;}
5: int t() { xsltParseStylesheetDoc(); return 0; }
/* end */
--------------------
Gibt es eine 32/64 Bit-Mismatch? http://StackOverflow.com/questions/3496857/Function-xsltparsStitlesheetdoc-not-found-in-libxml2-so Oder vielleicht hat dies eine Antwort http://StackOverflow.com/Questions/1225703/cant-build-gem- native-extension-build-fails-can-you-see-warum –
@John Ich glaube nicht; 'apt-get' hat mir immer das korrekte Paket zu 32/64 Bits gegeben. (Ich bin auf 'x86_64', und das Paket ist ein 'amd64'-Paket.) Ich habe es nur neu installiert, um sicher zu sein, und ich bekomme immer noch den gleichen Fehler. – Edwin
Was ist mit dem Ausführen der "apt-get" hier erwähnt: http://StackOverflow.com/Questions/8003523/error-Installing-Nokogiri-1-5-0-with-rails-3-1-0-and-ubuntu ? – Deradon