debian C++ OTL库 用 unixodbc 连接 mysql 小记

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内容图文

root@debian:~# uname -a
Linux debian 3.2.0-4-amd64 #1 SMP Debian 3.2.65-1 x86_64 GNU/Linux

mysql 

root@debian:~# mysql --version
mysql Ver 14.14 Distrib 5.5.43, for debian-linux-gnu (x86_64) using readline 6.2

unixODBC

root@debian:~# isql --versoin

unixODBC 2.3.2

OTL版本

OTL 4.0.359

 下载地址:http://otl.sourceforge.net/

程序安装

1,unixODBC

下载地址:

http://www.unixodbc.org/

1. copy the unixODBC-2.3.2.tar.gz file somewhere you can create files and directories
2. gunzip unixODBC*.tar.gz
3. tar xvf unixODBC*.tar

./configure 
make 
make install

就OK了

2,mysql 

 apt-get install mysql-server  mysql-client   

还需要安装 mysql的odbc驱动

下载地址:

http://mirrors.sohu.com/mysql/Connector-ODBC/5.3/

如果是新版本改下5.3这个版本号就ok.

我的linux 是x64所以下载

mysql-connector-odbc-5.3.2-linux-glibc2.5-x86-64bit.tar.gz

解压

tar zxvf mysql-connector-odbc-5.3.2-linux-glibc2.5-x86-64bit.tar.gz
cd mysql-connector-odbc-5.3.2-linux-glibc2.5-x86-64bit

./configure
make
make install

 

配置unixodbc

UNIXODBC 安装好后会有:

/etc/odbcinst.ini 和 /etc/odbc.ini ********但配置这两个文件不会生效,原因我暂时没有找到.请高手指点.

/usr/local/etc/odbcinst.ini 和 /usr/local/etc/odbc.ini 这两个配置文件才会生效.

/usr/local/etc/odbcinst.ini  配置:

[mysqlodbc]　　　　　　#Section
Driver=/usr/local/lib/libmyodbc5w.so　　　　　　#libmyodbc5w.so 和libmyodbc5a.so的区别

SETUP=/usr/local/lib/libmyodbc5w.so
UsageCount=1

关于 libmyodbc5w.so 和libmyodbc5a.so的区别 在  

http://bugs.mysql.com/bug.php?id=69837

找到了相应的答案.

"

　　The odbcinst.ini file shows the driver library name as libmyodbc5.so, which
    is not right for Connector/ODBC 5.2.5. It has to be either libmyodbc5w.so 
    (Unicode version) or libmyodbc5a.so (ANSI version). So, which version of
    Connector/ODBC 5.2.5 you used? Was it Unicode (w) or ANSI (a)?

"

　　libmyodbc5w.so  是unicode 版本的.

　　libmyodbc5a.so 是ansi版本的.

 /usr/local/etc/odbc.ini  配置:

[TEST]　　　　#Section
#Driver=/usr/local/lib/libmyodbc5a.so
Description = The Database for mysql
Trace = On
TraceFile = stderr
Driver = mysqlodbc　　　　#odbcinst.ini 中指定的Section
SERVER = localhost     #数据库IP
USER = sa2　　　　　　#用户名
PASSWORD =  111111　　　　　　#密码
PORT = 3306　　　　　　　　#数据库端口
DATABASE = test1　　　　#要连接的数据库

socket=/var/run/mysqld/mysqld.sock　　　　#虽然这儿指定 mysqld.sock位置,但后面还是会报错,下文有相应解决办法.

charset = UTF8　　　　#指定编码
option = 3

在配置文件里，DSN的名字即为Section的名字。在配置信息中，有一部分配置项是ODBC使用的，另一部分则由驱动程序处理。如果操作完全正确的话，现在ODBC已经成功了。可以试下isql命令操作刚配置的DSN。

可能会报错误:

 Can‘t connect to local MySQL server through socket ‘/tmp/mysql.sock‘ (2)

通过查看 

　　cat /etc/mysql/my.cnf 可以得知:

　　socket = /var/run/mysqld/mysqld.sock

　　最简单的办法建立软连接.

　　命令:ln -s /var/run/mysqld/mysqld.sock /tmp/mysql.sock

　　查看:

root@debian:/home/c2# ls -l /tmp
total 0
lrwxrwxrwx 1 root root 27 Jul 10 00:39 mysql.sock -> /var/run/mysqld/mysqld.sock

　　连接成功.

　　再运行 命令:

root@debian:~# isql TEST -v
+---------------------------------------+
| Connected!                            |
|                                       |
| sql-statement                         |
| help [tablename]                      |
| quit                                  |
|                                       |
+---------------------------------------+
SQL> select * from t1;
+-----------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Id        | name                                                                                                                                                                                                                                                           | name2                                                                                                                                                                                                                                                          |
+-----------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| 1         | 杩姣                                                                                                                                                                                                                                                         | 灏3                                                                                                                                                                                                                                                           |
| 2         | rq                                                                                                                                                                                                                                                             | fasdf                                                                                                                                                                                                                                                          |
| 3         | 灏寮?                                                                                                                                                                                                                                                        | xiaoZ                                                                                                                                                                                                                                                          |
+-----------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
SQLRowCount returns 3
3 rows fetched
SQL> 

t1表的视图:

 通过OTL连接mysql

目录内容如下:

 otltest.cpp内容如下:

#include <iostream>
using namespace std;
#include <stdio.h>
#include <string.h>
#include <stdlib.h>


#include <stdio.h>

// Thefollowing #define is required with MyODBC 5.1 and higher  
//#define OTL_ODBC_SELECT_STM_EXECUTE_BEFORE_DESCRIBE  


#define OTL_ODBC // CompileOTL 4.0/ODBC  
#define OTL_ODBC_UNIX // uncomment this line if UnixODBC is used
//#define OTL_UNICODE // Compile OTL with Unicode    --->屏蔽 使用时中文显示乱码

#include "otlv4.h" // include the OTL 4.0 header file




otl_connect db; // connect object


void select()
{ 
    try{
        otl_stream ostream1(500, // buffer size
            "select * from t1 ",
            // SELECT statement
            db // connect object
            ); 
        // create select stream

        int id;
        unsigned char user[255];
        unsigned  char name[255];

        while(!ostream1.eof())
        { // while not end-of-data
            //ostream1>>id>>user>>name;
            ostream1>>id;
            ostream1>>user;
            ostream1>>name;
            cout<<"id="<<id<<endl;
            cout<<"user="<<user<<endl;
            cout<<"name="<<name<<endl;

        }
    }

    catch(otl_exception& p)
    { // intercept OTL exceptions

        cout<<"otl_exception:"<<endl;
        cerr<<p.msg<<endl; // print out error message
        cerr<<p.stm_text<<endl; // print out SQL that caused the error
        cerr<<p.var_info<<endl; // print out the variable that caused the error
    }

}

int main()
{

    cout<<"hello"<<endl;
    otl_connect::otl_initialize(); // initialize the database API environment
    try{

        db.rlogon("sa2/111111@TEST"); // connect to the database 这儿是  用户名/密码@section名 (/usr/local/etc/odbc.ini  的section名)


        select(); // select records from table

    }

    catch(otl_exception& p){ // intercept OTL exceptions
        cerr<<p.msg<<endl; // print out error message
        cerr<<p.stm_text<<endl; // print out SQL that caused the error
        cerr<<p.var_info<<endl; // print out the variable that caused the error
    }

    db.logoff(); // disconnect from the database

    return 0;

}

CMakeLists.txt 内容:

cmake_minimum_required (VERSION 2.6)
project (otltest2)
add_executable(otltest2 otltest.cpp)
target_link_libraries(otltest2 libmyodbc5a.so)   --->

　　一定要添加 libmyodbc5a.so  否则会出现 SQLFreeHandle  之类的错误

root@debian:/home/c2# make 
-- Configuring done
-- Generating done
-- Build files have been written to: /home/c2
Scanning dependencies of target otltest2
[100%] Building CXX object CMakeFiles/otltest2.dir/otltest.cpp.o
Linking CXX executable otltest2
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_conn::~otl_conn()‘:
otltest.cpp:(.text._ZN8otl_connD2Ev[_ZN8otl_connD5Ev]+0x63): undefined reference to `SQLFreeHandle‘
otltest.cpp:(.text._ZN8otl_connD2Ev[_ZN8otl_connD5Ev]+0x9b): undefined reference to `SQLFreeHandle‘
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_conn::rlogon(char const*, int)‘:
otltest.cpp:(.text._ZN8otl_conn6rlogonEPKci[_ZN8otl_conn6rlogonEPKci]+0x532): undefined reference to `SQLAllocHandle‘
otltest.cpp:(.text._ZN8otl_conn6rlogonEPKci[_ZN8otl_conn6rlogonEPKci]+0x588): undefined reference to `SQLSetEnvAttr‘
otltest.cpp:(.text._ZN8otl_conn6rlogonEPKci[_ZN8otl_conn6rlogonEPKci]+0x5df): undefined reference to `SQLAllocHandle‘
otltest.cpp:(.text._ZN8otl_conn6rlogonEPKci[_ZN8otl_conn6rlogonEPKci]+0x64c): undefined reference to `SQLSetConnectAttr‘
otltest.cpp:(.text._ZN8otl_conn6rlogonEPKci[_ZN8otl_conn6rlogonEPKci]+0x67d): undefined reference to `SQLSetConnectAttr‘
otltest.cpp:(.text._ZN8otl_conn6rlogonEPKci[_ZN8otl_conn6rlogonEPKci]+0x6eb): undefined reference to `SQLSetConnectAttr‘
otltest.cpp:(.text._ZN8otl_conn6rlogonEPKci[_ZN8otl_conn6rlogonEPKci]+0x765): undefined reference to `SQLConnect‘
otltest.cpp:(.text._ZN8otl_conn6rlogonEPKci[_ZN8otl_conn6rlogonEPKci]+0x85e): undefined reference to `SQLDriverConnect‘
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_conn::logoff()‘:
otltest.cpp:(.text._ZN8otl_conn6logoffEv[_ZN8otl_conn6logoffEv]+0x57): undefined reference to `SQLDisconnect‘
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_conn::error(otl_exc&)‘:
otltest.cpp:(.text._ZN8otl_conn5errorER7otl_exc[_ZN8otl_conn5errorER7otl_exc]+0x67): undefined reference to `SQLGetDiagRec‘
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_conn::commit()‘:
otltest.cpp:(.text._ZN8otl_conn6commitEv[_ZN8otl_conn6commitEv]+0x22): undefined reference to `SQLEndTran‘
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_cur::open(otl_conn&)‘:
otltest.cpp:(.text._ZN7otl_cur4openER8otl_conn[_ZN7otl_cur4openER8otl_conn]+0x4b): undefined reference to `SQLAllocHandle‘
otltest.cpp:(.text._ZN7otl_cur4openER8otl_conn[_ZN7otl_cur4openER8otl_conn]+0xa7): undefined reference to `SQLSetStmtAttr‘
otltest.cpp:(.text._ZN7otl_cur4openER8otl_conn[_ZN7otl_cur4openER8otl_conn]+0x100): undefined reference to `SQLSetStmtAttr‘
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_cur::close(char)‘:
otltest.cpp:(.text._ZN7otl_cur5closeEc[_ZN7otl_cur5closeEc]+0x2d): undefined reference to `SQLFreeHandle‘
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_cur::sql_row_count(long*)‘:
otltest.cpp:(.text._ZN7otl_cur13sql_row_countEPl[_ZN7otl_cur13sql_row_countEPl]+0x23): undefined reference to `SQLRowCount‘
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_cur::parse(char*)‘:
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x498): undefined reference to `SQLTables‘
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x520): undefined reference to `SQLStatistics‘
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x566): undefined reference to `SQLGetTypeInfo‘
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x604): undefined reference to `SQLColumns‘
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x67c): undefined reference to `SQLProcedures‘
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x71a): undefined reference to `SQLColumnPrivileges‘
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x792): undefined reference to `SQLTablePrivileges‘
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x80a): undefined reference to `SQLPrimaryKeys‘
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x8a8): undefined reference to `SQLProcedureColumns‘
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x97e): undefined reference to `SQLForeignKeys‘
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0xa18): undefined reference to `SQLExecDirect‘
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0xc53): undefined reference to `SQLPrepare‘
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_cur::exec(int, int, unsigned char)‘:
otltest.cpp:(.text._ZN7otl_cur4execEiih[_ZN7otl_cur4execEiih]+0x79): undefined reference to `SQLSetStmtAttr‘
otltest.cpp:(.text._ZN7otl_cur4execEiih[_ZN7otl_cur4execEiih]+0xe1): undefined reference to `SQLExecute‘
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_cur::bind(char const*, otl_var&, int, int, int, int, int, int)‘:
otltest.cpp:(.text._ZN7otl_cur4bindEPKcR7otl_variiiiii[_ZN7otl_cur4bindEPKcR7otl_variiiiii]+0x16b): undefined reference to `SQLBindParameter‘
otltest.cpp:(.text._ZN7otl_cur4bindEPKcR7otl_variiiiii[_ZN7otl_cur4bindEPKcR7otl_variiiiii]+0x233): undefined reference to `SQLBindParameter‘
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_cur::bind(int, otl_var&, int, int, int)‘:
otltest.cpp:(.text._ZN7otl_cur4bindEiR7otl_variii[_ZN7otl_cur4bindEiR7otl_variii]+0xe5): undefined reference to `SQLBindCol‘
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_cur::describe_column(otl_column_desc&, int, int&)‘:
otltest.cpp:(.text._ZN7otl_cur15describe_columnER15otl_column_desciRi[_ZN7otl_cur15describe_columnER15otl_column_desciRi]+0x49): undefined reference to `SQLNumResultCols‘
otltest.cpp:(.text._ZN7otl_cur15describe_columnER15otl_column_desciRi[_ZN7otl_cur15describe_columnER15otl_column_desciRi]+0xf1): undefined reference to `SQLDescribeCol‘
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_cur::error(otl_exc&)‘:
otltest.cpp:(.text._ZN7otl_cur5errorER7otl_exc[_ZN7otl_cur5errorER7otl_exc]+0x67): undefined reference to `SQLGetDiagRec‘
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_sel::close_select(otl_cur&)‘:
otltest.cpp:(.text._ZN7otl_sel12close_selectER7otl_cur[_ZN7otl_sel12close_selectER7otl_cur]+0x33): undefined reference to `SQLFreeStmt‘
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_sel::first(otl_cur&, int&, int&, int&, int&, int)‘:
otltest.cpp:(.text._ZN7otl_sel5firstER7otl_curRiS2_S2_S2_i[_ZN7otl_sel5firstER7otl_curRiS2_S2_S2_i]+0x52): undefined reference to `SQLSetStmtAttr‘
otltest.cpp:(.text._ZN7otl_sel5firstER7otl_curRiS2_S2_S2_i[_ZN7otl_sel5firstER7otl_curRiS2_S2_S2_i]+0xb5): undefined reference to `SQLSetStmtAttr‘
otltest.cpp:(.text._ZN7otl_sel5firstER7otl_curRiS2_S2_S2_i[_ZN7otl_sel5firstER7otl_curRiS2_S2_S2_i]+0x111): undefined reference to `SQLExecute‘
otltest.cpp:(.text._ZN7otl_sel5firstER7otl_curRiS2_S2_S2_i[_ZN7otl_sel5firstER7otl_curRiS2_S2_S2_i]+0x16c): undefined reference to `SQLFetchScroll‘
otltest.cpp:(.text._ZN7otl_sel5firstER7otl_curRiS2_S2_S2_i[_ZN7otl_sel5firstER7otl_curRiS2_S2_S2_i]+0x20e): undefined reference to `SQLFreeStmt‘
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_sel::next(otl_cur&, int&, int&, int&, int&, int)‘:
otltest.cpp:(.text._ZN7otl_sel4nextER7otl_curRiS2_S2_S2_i[_ZN7otl_sel4nextER7otl_curRiS2_S2_S2_i]+0x86): undefined reference to `SQLFreeStmt‘
otltest.cpp:(.text._ZN7otl_sel4nextER7otl_curRiS2_S2_S2_i[_ZN7otl_sel4nextER7otl_curRiS2_S2_S2_i]+0xca): undefined reference to `SQLFetchScroll‘
otltest.cpp:(.text._ZN7otl_sel4nextER7otl_curRiS2_S2_S2_i[_ZN7otl_sel4nextER7otl_curRiS2_S2_S2_i]+0x161): undefined reference to `SQLFreeStmt‘
collect2: error: ld returned 1 exit status
make[2]: *** [otltest2] Error 1
make[1]: *** [CMakeFiles/otltest2.dir/all] Error 2
make: *** [all] Error 2
root@debian:/home/c2# 

当 

　　target_link_libraries(otltest2 libmyodbc5a.so) 
　　程序生成.

root@debian:/home/c2# make clean 
root@debian:/home/c2# cmake .
-- Configuring done
-- Generating done
-- Build files have been written to: /home/c2
root@debian:/home/c2# make
-- Configuring done
-- Generating done
-- Build files have been written to: /home/c2
[100%] Building CXX object CMakeFiles/otltest2.dir/otltest.cpp.o
Linking CXX executable otltest2
[100%] Built target otltest2
root@debian:/home/c2# 

前面说过 

　　libmyodbc5w.so  是unicode 版本的.

　　libmyodbc5a.so 是ansi版本的.

当 

target_link_libraries(otltest2 libmyodbc5w.so) 时 出错,

otl_conn::rlogon(char const*, int) 说明 unicode 版本不能使用.

unicode 应该是 otl_conn::rlogon(wchar const*, int) 

otl.h 中有个 OTL_UNICODE_EXCEPTION_AND_RLOGON 这个宏 ,有时间的朋友可以研究下说下方式.3Q.

root@debian:/home/c2# make
-- Configuring done
-- Generating done
-- Build files have been written to: /home/c2
[100%] Building CXX object CMakeFiles/otltest2.dir/otltest.cpp.o
Linking CXX executable otltest2
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_conn::rlogon(char const*, int)‘:
otltest.cpp:(.text._ZN8otl_conn6rlogonEPKci[_ZN8otl_conn6rlogonEPKci]+0x64c): undefined reference to `SQLSetConnectAttr‘
otltest.cpp:(.text._ZN8otl_conn6rlogonEPKci[_ZN8otl_conn6rlogonEPKci]+0x67d): undefined reference to `SQLSetConnectAttr‘
otltest.cpp:(.text._ZN8otl_conn6rlogonEPKci[_ZN8otl_conn6rlogonEPKci]+0x6eb): undefined reference to `SQLSetConnectAttr‘
otltest.cpp:(.text._ZN8otl_conn6rlogonEPKci[_ZN8otl_conn6rlogonEPKci]+0x765): undefined reference to `SQLConnect‘
otltest.cpp:(.text._ZN8otl_conn6rlogonEPKci[_ZN8otl_conn6rlogonEPKci]+0x85e): undefined reference to `SQLDriverConnect‘
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_conn::error(otl_exc&)‘:
otltest.cpp:(.text._ZN8otl_conn5errorER7otl_exc[_ZN8otl_conn5errorER7otl_exc]+0x67): undefined reference to `SQLGetDiagRec‘
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_cur::open(otl_conn&)‘:
otltest.cpp:(.text._ZN7otl_cur4openER8otl_conn[_ZN7otl_cur4openER8otl_conn]+0xa7): undefined reference to `SQLSetStmtAttr‘
otltest.cpp:(.text._ZN7otl_cur4openER8otl_conn[_ZN7otl_cur4openER8otl_conn]+0x100): undefined reference to `SQLSetStmtAttr‘
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_cur::parse(char*)‘:
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x498): undefined reference to `SQLTables‘
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x520): undefined reference to `SQLStatistics‘
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x566): undefined reference to `SQLGetTypeInfo‘
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x604): undefined reference to `SQLColumns‘
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x67c): undefined reference to `SQLProcedures‘
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x71a): undefined reference to `SQLColumnPrivileges‘
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x792): undefined reference to `SQLTablePrivileges‘
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x80a): undefined reference to `SQLPrimaryKeys‘
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x8a8): undefined reference to `SQLProcedureColumns‘
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x97e): undefined reference to `SQLForeignKeys‘
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0xa18): undefined reference to `SQLExecDirect‘
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0xc53): undefined reference to `SQLPrepare‘
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_cur::exec(int, int, unsigned char)‘:
otltest.cpp:(.text._ZN7otl_cur4execEiih[_ZN7otl_cur4execEiih]+0x79): undefined reference to `SQLSetStmtAttr‘
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_cur::describe_column(otl_column_desc&, int, int&)‘:
otltest.cpp:(.text._ZN7otl_cur15describe_columnER15otl_column_desciRi[_ZN7otl_cur15describe_columnER15otl_column_desciRi]+0xf1): undefined reference to `SQLDescribeCol‘
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_cur::error(otl_exc&)‘:
otltest.cpp:(.text._ZN7otl_cur5errorER7otl_exc[_ZN7otl_cur5errorER7otl_exc]+0x67): undefined reference to `SQLGetDiagRec‘
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_sel::first(otl_cur&, int&, int&, int&, int&, int)‘:
otltest.cpp:(.text._ZN7otl_sel5firstER7otl_curRiS2_S2_S2_i[_ZN7otl_sel5firstER7otl_curRiS2_S2_S2_i]+0x52): undefined reference to `SQLSetStmtAttr‘
otltest.cpp:(.text._ZN7otl_sel5firstER7otl_curRiS2_S2_S2_i[_ZN7otl_sel5firstER7otl_curRiS2_S2_S2_i]+0xb5): undefined reference to `SQLSetStmtAttr‘
collect2: error: ld returned 1 exit status
make[2]: *** [otltest2] Error 1
make[1]: *** [CMakeFiles/otltest2.dir/all] Error 2
make: *** [all] Error 2
root@debian:/home/c2# 

 但 unixodbc 的ini 配置 文件

/usr/local/etc/odbcinst.ini  配置:

[mysqlodbc]　　　　　　#Section
Driver=/usr/local/lib/libmyodbc5w.so　　　　　　#libmyodbc5w.so 和libmyodbc5a.so的区别

SETUP=/usr/local/lib/libmyodbc5w.so
UsageCount=1

　　这儿配置 libmyodbc5w.so 和libmyodbc5a.so 都能正常访问.

　　运行 otltest2

root@debian:/home/c2# ./otltest2
hello
id=1
user=杩姣
name=灏3
id=2
user=rq
name=fasdf
id=3
user=灏寮?
name=xiaoZ

root@debian:/home/c2# 

linux 下不能显示中文.

另一个程序可以在网页中显示:

 至此 在debian x64环境下通过C++ 的OTL库去访问mysql已经完成.

debian C++ OTL库 用 unixodbc 连接 mysql 小记

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本文系统来源：http://www.cnblogs.com/bleachli/p/4635660.html

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