# Ammetto, ho la testa dura **URL:** \ **Category:** IT\ **Created:** [September 13, 2011, 11:16am UTC](https://www.ruby-forum.com/t/ammetto-ho-la-testa-dura/211765 "2011-09-13T11:16:22Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![dubstep](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/cdc98d/32.png) [@dubstep](https://www.ruby-forum.com/u/dubstep)\ **Post date:** [September 13, 2011, 11:16am UTC](https://www.ruby-forum.com/t/ammetto-ho-la-testa-dura/211765/1 "2011-09-13T11:16:22Z")
quando cerco di installare mysql2 mi dice quanto sotto riportato: gem install mysql2 /usr/local/rvm/rubies/ruby-1.9.2-p290/bin/gem:4: warning: Insecure world writable dir /usr/local/rvm/gems/ruby-1.9.2-p290/bin in PATH, mode 042777 Building native extensions. This could take a while… ERROR: Error installing mysql2: ERROR: Failed to build gem native extension. ``` /usr/local/rvm/rubies/ruby-1.9.2-p290/bin/ruby extconf.rb ``` checking for rb\_thread\_blocking\_region()… yes checking for mysql\_query() in -lmysqlclient… no checking for main() in -lm… yes checking for mysql\_query() in -lmysqlclient… no checking for main() in -lz… yes checking for mysql\_query() in -lmysqlclient… no checking for main() in -lsocket… no checking for mysql\_query() in -lmysqlclient… no checking for main() in -lnsl… yes checking for mysql\_query() in -lmysqlclient… no checking for main() in -lmygcc… no checking for mysql\_query() in -lmysqlclient… 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/rvm/rubies/ruby-1.9.2-p290/bin/ruby –with-mysql-config –without-mysql-config –with-mysql-dir –without-mysql-dir –with-mysql-include –without-mysql-include=${mysql-dir}/include –with-mysql-lib –without-mysql-lib=${mysql-dir}/lib –with-mysqlclientlib –without-mysqlclientlib –with-mlib –without-mlib –with-mysqlclientlib –without-mysqlclientlib –with-zlib –without-zlib –with-mysqlclientlib –without-mysqlclientlib –with-socketlib –without-socketlib –with-mysqlclientlib –without-mysqlclientlib –with-nsllib –without-nsllib –with-mysqlclientlib –without-mysqlclientlib –with-mygcclib –without-mygcclib –with-mysqlclientlib –without-mysqlclientlib Gem files will remain installed in /usr/local/rvm/gems/ruby-1.9.2-p290/gems/mysql2-0.3.7 for inspection. Results logged to /usr/local/rvm/gems/ruby-1.9.2-p290/gems/mysql2-0.3.7/ext/mysql2/gem\_make.out perchè? come se non trovasse qualcosa, ma cosa? aggiungo che in /var/run/mysqld/ c’è mysqld.sock il sistema ora è ubuntu server ---
**Author:** ![abacus](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/e5b9ba/32.png) [@abacus](https://www.ruby-forum.com/u/abacus)\ **Post date:** [September 13, 2011, 11:21am UTC](https://www.ruby-forum.com/t/ammetto-ho-la-testa-dura/211765/2 "2011-09-13T11:21:59Z")
Quando ho avuto questo problema in passato, era riconducibile al fatto che l’installazione della gemma non trovasse l’eseguibile del client mysql. Prova a mettere la directory cos: gem install mysql --with-mysql-dir /path/to/mysql Alessandro ---
**Author:** ![abacus](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/e5b9ba/32.png) [@abacus](https://www.ruby-forum.com/u/abacus)\ **Post date:** [September 13, 2011, 11:39am UTC](https://www.ruby-forum.com/t/ammetto-ho-la-testa-dura/211765/3 "2011-09-13T11:39:53Z")
non cambia… gem install mysql2 – --with-mysql-dir=/usr/bin/ /usr/local/rvm/rubies/ruby-1.9.2-p290/bin/gem:4: warning: Insecure world writable dir /usr/local/rvm/gems/ruby-1.9.2-p290/bin in PATH, mode 042777 Building native extensions. This could take a while… ERROR: Error installing mysql2: ERROR: Failed to build gem native extension. ``` /usr/local/rvm/rubies/ruby-1.9.2-p290/bin/ruby extconf.rb ``` –with-mysql-dir=/usr/bin/ checking for rb\_thread\_blocking\_region()… yes checking for mysql\_query() in -lmysqlclient… no checking for main() in -lm… yes checking for mysql\_query() in -lmysqlclient… no checking for main() in -lz… yes checking for mysql\_query() in -lmysqlclient… no checking for main() in -lsocket… no checking for mysql\_query() in -lmysqlclient… no checking for main() in -lnsl… yes checking for mysql\_query() in -lmysqlclient… no checking for main() in -lmygcc… no checking for mysql\_query() in -lmysqlclient… 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/rvm/rubies/ruby-1.9.2-p290/bin/ruby –with-mysql-config –without-mysql-config –with-mysql-dir –with-mysql-include –without-mysql-include=${mysql-dir}/include –with-mysql-lib –without-mysql-lib=${mysql-dir}/lib –with-mysqlclientlib –without-mysqlclientlib –with-mlib –without-mlib –with-mysqlclientlib –without-mysqlclientlib –with-zlib –without-zlib –with-mysqlclientlib –without-mysqlclientlib –with-socketlib –without-socketlib –with-mysqlclientlib –without-mysqlclientlib –with-nsllib –without-nsllib –with-mysqlclientlib –without-mysqlclientlib –with-mygcclib –without-mygcclib –with-mysqlclientlib –without-mysqlclientlib Gem files will remain installed in /usr/local/rvm/gems/ruby-1.9.2-p290/gems/mysql2-0.3.7 for inspection. Results logged to /usr/local/rvm/gems/ruby-1.9.2-p290/gems/mysql2-0.3.7/ext/mysql2/gem\_make.out idem con patate ---
**Author:** ![abacus](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/e5b9ba/32.png) [@abacus](https://www.ruby-forum.com/u/abacus)\ **Post date:** [September 13, 2011, 11:43am UTC](https://www.ruby-forum.com/t/ammetto-ho-la-testa-dura/211765/4 "2011-09-13T11:43:37Z")
On 13 September 2011 11:39, davide isoardi [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > non cambia… Potrebbe essere necessario installare libmysqlclient-dev. ( un virtual package, quando farei apt-get install ti dir lui il pacchetto da installare). Ciao ciao Paolo – “… static analysis is fun, again!” life from an application security guy ~\> [http://thesp0nge.com](http://thesp0nge.com) ---
**Author:** ![abacus](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/e5b9ba/32.png) [@abacus](https://www.ruby-forum.com/u/abacus)\ **Post date:** [September 13, 2011, 11:50am UTC](https://www.ruby-forum.com/t/ammetto-ho-la-testa-dura/211765/5 "2011-09-13T11:50:26Z")
Ok, Paolo vince. Ma oltre a eseguire meramente il comando indicato, sai dirmi a cosa serviva quel pacchetto? ••••••••••••••••••••••••••••••••••••••••••• Davide Isoardi E-mail: removed\_email\_address@domain.invalid iPhone: +39 392 1031631 mobile: +39 346 1688804 ••••••••••••••••••••••••••••••••••••••••••• Il giorno 13/set/2011, alle ore 11:43, Paolo P. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) ha scritto: ---
**Author:** ![abacus](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/e5b9ba/32.png) [@abacus](https://www.ruby-forum.com/u/abacus)\ **Post date:** [September 13, 2011, 11:58am UTC](https://www.ruby-forum.com/t/ammetto-ho-la-testa-dura/211765/6 "2011-09-13T11:58:29Z")
2011/9/13 Abacus [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid): > Ok, Paolo vince. Ma oltre a eseguire meramente il comando indicato, sai dirmi a > cosa > serviva quel pacchetto? > Certo. In generale, quando installi un pacchetto su unix vengono > installate anche le librerie che servono per farlo funzionare. Ad > esempio, apt-get install mysql installer tutte le librerie per far > funzionare i binari di mysql. Se per tu devi compilare un programma che usa funzionalit in quelle librerie hai bisogno di pezzi in pi, i pacchetti che solitamente hanno -dev nel nome. Lo si fa per installare sulla linux box solo le cose che effettivamente servono. ## HTH Paolo “… static analysis is fun, again!” life from an application security guy ~\> [http://thesp0nge.com](http://thesp0nge.com) ---
**Author:** ![abacus](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/e5b9ba/32.png) [@abacus](https://www.ruby-forum.com/u/abacus)\ **Post date:** [September 13, 2011, 12:04pm UTC](https://www.ruby-forum.com/t/ammetto-ho-la-testa-dura/211765/7 "2011-09-13T12:04:41Z")
Ringrazio enormemente delle delucidazioni… Grazie ••••••••••••••••••••••••••••••••••••••••••• Davide Isoardi E-mail: removed\_email\_address@domain.invalid iPhone: +39 392 1031631 mobile: +39 346 1688804 ••••••••••••••••••••••••••••••••••••••••••• Il giorno 13/set/2011, alle ore 11:57, Paolo P. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) ha scritto: ---
**Author:** ![abacus](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/e5b9ba/32.png) [@abacus](https://www.ruby-forum.com/u/abacus)\ **Post date:** [September 13, 2011, 11:57am UTC](https://www.ruby-forum.com/t/ammetto-ho-la-testa-dura/211765/8 "2011-09-13T11:57:14Z")
sono gli headers necessari a compilare alcune parti binarie (quindi codice nativo in C, non ruby) della gemma mysql2 può capitare con diverse gemme (penso a nokogiri o mongo, per esempio). in quel caso, controllo l’output di errore, vedi qualche libreria/header è mancante, e cercala con apt-cache o aptitude. di norma, dopo un po’ di tentativi, funziona 😉 A. Il 13/09/2011 11:49, Abacus ha scritto: