在jruby上安装mysql的许多错误 [英] many errors installing mysql on jruby
问题描述
我正在尝试安装mysql gem以便在Rails上使用,使用jruby,无法弄清楚这一点...感谢您的帮助!
I'm trying to get mysql gem installed for use on rails, using jruby, can't figure this out...any help is appreciated!
$ sudo gem install mysql2
Building native extensions. This could take a while...
ERROR: Error installing mysql2:
ERROR: Failed to build gem native extension.
/Users/masedesign/Work/repos/code/conf/vms/ruby/jruby/bin/jruby extconf.rb
WARNING: JRuby does not support native extensions or the `mkmf' library very well.
Check http://kenai.com/projects/jruby/pages/Home for alternatives.
checking for rb_thread_blocking_region()... checking for rb_wait_for_single_fd()... no
checking for mysql.h... yes
checking for errmsg.h... yes
checking for mysqld_error.h... yes
creating Makefile
make
cc -I. -I. -I/Users/masedesign/Work/repos/code/conf/vms/ruby/jruby/lib/native/include/ruby -I. -DHAVE_RB_THREAD_BLOCKING_REGION -DHAVE_MYSQL_H -DHAVE_ERRMSG_H -DHAVE_MYSQLD_ERROR_H -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -I/usr/local/mysql/include -g -Os -arch x86_64 -fno-common -D_P1003_1B_VISIBLE -DSIGNAL_WITH_VIO_CLOSE -DSIGNALS_DONT_BREAK_READ -DIGNORE_SIGHUP_SIGQUIT -DDONT_DECLARE_CXA_PURE_VIRTUAL -fPIC -DTARGET_RT_MAC_CFM=0 -fno-omit-frame-pointer -fno-strict-aliasing -fexceptions -Wall -funroll-loops -arch x86_64 -c client.c
cc -I. -I. -I/Users/masedesign/Work/repos/code/conf/vms/ruby/jruby/lib/native/include/ruby -I. -DHAVE_RB_THREAD_BLOCKING_REGION -DHAVE_MYSQL_H -DHAVE_ERRMSG_H -DHAVE_MYSQLD_ERROR_H -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -I/usr/local/mysql/include -g -Os -arch x86_64 -fno-common -D_P1003_1B_VISIBLE -DSIGNAL_WITH_VIO_CLOSE -DSIGNALS_DONT_BREAK_READ -DIGNORE_SIGHUP_SIGQUIT -DDONT_DECLARE_CXA_PURE_VIRTUAL -fPIC -DTARGET_RT_MAC_CFM=0 -fno-omit-frame-pointer -fno-strict-aliasing -fexceptions -Wall -funroll-loops -arch x86_64 -c mysql2_ext.c
cc -I. -I. -I/Users/masedesign/Work/repos/code/conf/vms/ruby/jruby/lib/native/include/ruby -I. -DHAVE_RB_THREAD_BLOCKING_REGION -DHAVE_MYSQL_H -DHAVE_ERRMSG_H -DHAVE_MYSQLD_ERROR_H -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -I/usr/local/mysql/include -g -Os -arch x86_64 -fno-common -D_P1003_1B_VISIBLE -DSIGNAL_WITH_VIO_CLOSE -DSIGNALS_DONT_BREAK_READ -DIGNORE_SIGHUP_SIGQUIT -DDONT_DECLARE_CXA_PURE_VIRTUAL -fPIC -DTARGET_RT_MAC_CFM=0 -fno-omit-frame-pointer -fno-strict-aliasing -fexceptions -Wall -funroll-loops -arch x86_64 -c result.c
cc -dynamic -bundle -undefined dynamic_lookup -o mysql2.bundle client.o mysql2_ext.o result.o -L"." -L"/Users/masedesign/Work/repos/code/conf/vms/ruby/jruby-1.6.5/lib" -bundle -framework JavaVM -Wl,-syslibroot, -mmacosx-version-min=10.4 -Wl,-rpath,/usr/local/mysql/lib -arch x86_64 -L/usr/local/mysql/lib -lmysqlclient_r -lz -lm -lmygcc
ld: library not found for -lbundle1.o
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [mysql2.bundle] Error 1
Gem files will remain installed in /Users/masedesign/Work/repos/code/conf/vms/ruby/jruby-1.6.5/lib/ruby/gems/1.8/gems/mysql2-0.3.11 for inspection.
Results logged to /Users/masedesign/Work/repos/code/conf/vms/ruby/jruby-1.6.5/lib/ruby/gems/1.8/gems/mysql2-0.3.11/ext/mysql2/gem_make.out
推荐答案
mysql
gem是仅针对MRI(Ruby 1.8)开发和测试的.因此,它在大多数实现中都使用了老式的C扩展.尽管JRuby在技术上支持它们,但它们速度慢且容易出错.所以不要使用它们.
The mysql
gem was developed and tested only against MRI (Ruby 1.8). As such it uses old-style C-extensions for most of their implementation. While they are technically supported by JRuby, they are slow and error-prone. So don't use them.
如果使用JRuby,则使用JDBC适配器要好得多,该JDBC适配器使用java-native数据库接口,因此速度更快,并且得到更好的支持.高阶介面(例如Rails所使用的介面)大致相同,您应该不会有任何差异.
If you use JRuby, you are much better off of using the JDBC adapters which use the java-native database interface and are thus much faster and much better supported. The high-level interface (as e.g. used by Rails) is roughly the same, you shouldn't notice any difference.
因此,对于JRuby,您应该使用jdbc-mysql
gem,或者-如果您使用Rails-activerecord-jdbcmysql-adapter
gem,它需要该gem并添加适当的数据库适配器.
So for JRuby you should use the jdbc-mysql
gem, or - if you use Rails - the activerecord-jdbcmysql-adapter
gem which requires that gem and adds the appropriate database adapter.
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