linux下用C语言写MySQL程序，用如下命令编译时出错：
[xitong@localhost mysql]$ gcc -o mysql mysql.c -lmysqlclient
错误如下:
/usr/bin/ld: cannot find -lmysqlclient
collect2: ld 返回 1
解决方法：
用locate命令查找mysqlclient所在目录，如下所示：
[xitong@localhost mysql]$ locate mysqlclient
结果显示：
/usr/local/mysql/lib/mysql/libmysqlclient.a
/usr/local/mysql/lib/mysql/libmysqlclient.la
/usr/local/mysql/lib/mysql/libmysqlclient.so
/usr/local/mysql/lib/mysql/libmysqlclient.so.16
/usr/local/mysql/lib/mysql/libmysqlclient.so.16.0.0
/usr/local/mysql/lib/mysql/libmysqlclient_r.a
/usr/local/mysql/lib/mysql/libmysqlclient_r.la
/usr/local/mysql/lib/mysql/libmysqlclient_r.so
/usr/local/mysql/lib/mysql/libmysqlclient_r.so.16
/usr/local/mysql/lib/mysql/libmysqlclient_r.so.16.0.0
编译时加入路径/usr/local/mysql/lib/mysql，如下：
[xitong@localhost mysql]$ gcc -o mysql mysql.c -L/usr/local/mysql/lib/mysql -lmysqlclient
[xitong@localhost mysql]$
编译通过，问题解决。
再加一点，编译问题解决了，运行的时候发现出现如下错误：
./mysql: error while loading shared libraries: libmysqlclient.so.16: cannot open shared object file: No such file or directory
借用一网友的解决方法，添加环境变量：
[xitong@localhost mysql]$ export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/mysql/lib/mysql/
再次运行编译好的程序，OK
