inohilog

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sudo gem install mysql に失敗するとき

  • rake db:migrate してもエラーがでる -> mysql を使う環境が整ってないんじゃ...
$ rake db:migrate
ERROR: Failed to build gem native extension.
inohiro@ubuntu:~$ sudo gem install mysql
Building native extensions.  This could take a while...
ERROR:  Error installing mysql:
	ERROR: Failed to build gem native extension.

/usr/bin/ruby1.8 extconf.rb
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... no
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/bin/ruby1.8
	--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 /var/lib/gems/1.8/gems/mysql-2.8.1 for inspection.
Results logged to /var/lib/gems/1.8/gems/mysql-2.8.1/ext/mysql_api/gem_make.out

どうやら prefix が必要らしい

  • mysql_conig の場所を教えてあげる必要があるみたい
    • 適当に探してみたら「/usr/local/mysql/bin/mysql_config」にあった
    • 「/usr/bin/mysql_config」にある場合もあるみたい
inohiro@ubuntu:~$ sudo gem install mysql -- --with-mysql-config=/usr/local/mysql/bin/mysql_config
Building native extensions.  This could take a while...
Successfully installed mysql-2.8.1
1 gem installed

Installing ri documentation for mysql-2.8.1...
# 省略

Installing RDoc documentation for mysql-2.8.1...
# 省略
  • うまくいったようだ

単純に prefix を渡してもダメな場合は、mysql_devel をインストール

$ sudo aptitude install mysql_devel