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我在其他一些帖子中提到的 Ubuntu Server 11.10 x64 上遇到了同样的错误： 帖子 #1 帖子 #2

由于“找不到 -lmysqlclient_r”，无法编译 mysql2 gem

我在用着：

  • 红宝石 v1.8.7
  • MySQL v5.5.25-1
  • 导轨 3.2.3
  • 宝石 1.8.24

我安装了软件包 libmysqlclient-dev ，它仍然无法正常工作。

文件 - libmysqlclient_r.a - libmysqlclient_r.so - libmysqlclient_r.so.18 - libmysqlclient_r.so.18.0.0 位于 /usr/lib/x86_64-linux-gnu/

所以我在 /usr/lib/ 中创建了符号链接 Ii 仍然不起作用:(

任何想法？？

$ sudo gem install mysql2
Building native extensions.  This could take a while...
ERROR:  Error installing mysql2:
        ERROR: Failed to build gem native extension.

        /usr/bin/ruby1.8 extconf.rb
checking for rb_thread_blocking_region()... no
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
gcc -I. -I. -I/usr/lib/ruby/1.8/x86_64-linux -I. -DHAVE_MYSQL_H -DHAVE_ERRMSG_H -DHAVE_MYSQLD_ERROR_H    -I/usr/include/mysql -DBIG_JOINS=1  -fno-strict-aliasing  -g -fPIC -fno-strict-aliasing -g -g -O2  -fPIC  -Wall -funroll-loops  -c mysql2_ext.c
./client.h:16:1: warning: ârb_thread_blocking_regionâ defined but not used [-Wunused-function]
gcc -I. -I. -I/usr/lib/ruby/1.8/x86_64-linux -I. -DHAVE_MYSQL_H -DHAVE_ERRMSG_H -DHAVE_MYSQLD_ERROR_H    -I/usr/include/mysql -DBIG_JOINS=1  -fno-strict-aliasing  -g -fPIC -fno-strict-aliasing -g -g -O2  -fPIC  -Wall -funroll-loops  -c result.c
result.c: In function ârb_mysql_result_fetch_rowâ:
result.c:258:31: warning: variable âtokensâ set but not used [-Wunused-but-set-variable]
result.c:272:58: warning: variable âtokensâ set but not used [-Wunused-but-set-variable]
result.c:315:33: warning: variable âtokensâ set but not used [-Wunused-but-set-variable]
gcc -I. -I. -I/usr/lib/ruby/1.8/x86_64-linux -I. -DHAVE_MYSQL_H -DHAVE_ERRMSG_H -DHAVE_MYSQLD_ERROR_H    -I/usr/include/mysql -DBIG_JOINS=1  -fno-strict-aliasing  -g -fPIC -fno-strict-aliasing -g -g -O2  -fPIC  -Wall -funroll-loops  -c client.c
client.c: In function ârb_mysql_client_infoâ:
client.c:539:3: warning: variable âwrapperâ set but not used [-Wunused-but-set-variable]
gcc -shared -o mysql2.so mysql2_ext.o result.o client.o -L. -L/usr/lib -L. -Wl,-Bsymbolic-functions -rdynamic -Wl,-export-dynamic -Wl,-rpath,/usr/lib/x86_64-linux-gnu    -lruby1.8 -L/usr/lib/x86_64-linux-gnu -lmysqlclient_r -lpthread -lz -lm -lrt -ldl  -lpthread -lrt -ldl -lcrypt -lm   -lc
/usr/bin/ld: cannot find -lmysqlclient_r
collect2: ld returned 1 exit status
make: *** [mysql2.so] Error 1
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