openwrt使用sqllite3总结

1.参考下面这个下载编译及安装

http://blog.csdn.net/rill_zhen/article/details/7493712

2.测试例子：

http://blog.163.com/linux_world/blog/static/1408830732010215873622/

                               //包含一个头文件就可以使用所以sqlite的接口了
#include "stdlib.h"

#include "stdio.h"

#include "string.h"

 

extern "C"
{
#include"./sqlite3.h"
};

 

void       createdb();

void       querydb();

 

int         main()

{

            createdb();

            querydb();

 

            return 0;

}

 

void       createdb()

{

            int                     ret;

            sqlite3               *pdb = 0;

            sqlite3_stmt      *stmt = 0;

            char                  *error = 0;

            char                  *sql = "insert into table1 values('value11',:aaa)";

            int                     index;

            static void          *value = "asdfadsfasdfjasdfjaksdfaskjdfakdsfaksfja";

 

            ret = sqlite3_open("db1.sdb", &pdb);                    //打开数据库，跟打开文本文件一样

            if( ret != SQLITE_OK )

                        return;

            ret = sqlite3_exec(pdb, "create table table1(col1 char(20), col2 BLOB)", 0,0, &error );

            if( ret != SQLITE_OK )

                        return;

 

            ret = sqlite3_prepare(pdb, sql,strlen(sql), &stmt, &error);

            if( ret != SQLITE_OK )

                        return;

 

            index = sqlite3_bind_parameter_index(stmt, ":aaa");

 

            ret = sqlite3_bind_blob(stmt, index, value, strlen(value), SQLITE_STATIC);

            if( ret != SQLITE_OK )

                        return;

 

            ret = sqlite3_step(stmt);

           

            if( ret != SQLITE_DONE )

                        return;

 

            sqlite3_close(pdb);        

}

 

void       querydb()

{

            int                     ret;

            sqlite3   *pdb = 0;

            sqlite3_stmt      *pstmt = 0;

            char      *error = 0;

            char      *sql = "select * from table1";

            int                     len;

            int                     i;

            char      *name;

            void       *value;

 

            ret = sqlite3_open("db1.sdb", &pdb);

            if( ret != SQLITE_OK )

                        return;

 

            ret = sqlite3_prepare(pdb, sql, strlen(sql), &pstmt, &error);

            if( ret != SQLITE_OK )

                        return;

 

            while( 1 )

            {

                        ret = sqlite3_step(pstmt);

                        if( ret != SQLITE_ROW )

                                    break;

 

                        name = sqlite3_column_text(pstmt, 0);

                        value = sqlite3_column_blob(pstmt, 1);

                        len = sqlite3_column_bytes(pstmt,1 );

            }

}

 

编译sample出错：

    /opt/build/lib//libsqlite3.a(sqlite3.o): In function `unixDlSym': 

    /opt/sqlite-autoconf-3070900/sqlite3.c:29926: undefined reference to `dlsym' 

    /opt/build/lib//libsqlite3.a(sqlite3.o): In function `pthreadMutexLeave': 

    /opt/sqlite-autoconf-3070900/sqlite3.c:17807: undefined reference to `pthread_mutex_unlock' 

    /opt/build/lib//libsqlite3.a(sqlite3.o): In function `pthreadMutexTry': 

    /opt/sqlite-autoconf-3070900/sqlite3.c:17769: undefined reference to `pthread_mutex_trylock' 

    /opt/build/lib//libsqlite3.a(sqlite3.o): In function `pthreadMutexEnter': 

    /opt/sqlite-autoconf-3070900/sqlite3.c:17723: undefined reference to `pthread_mutex_lock' 

    /opt/build/lib//libsqlite3.a(sqlite3.o): In function `pthreadMutexFree': 

    /opt/sqlite-autoconf-3070900/sqlite3.c:17680: undefined reference to `pthread_mutex_destroy' 

    /opt/build/lib//libsqlite3.a(sqlite3.o): In function `pthreadMutexAlloc': 

    /opt/sqlite-autoconf-3070900/sqlite3.c:17654: undefined reference to `pthread_mutex_init' 

    /opt/sqlite-autoconf-3070900/sqlite3.c:17637: undefined reference to `pthread_mutexattr_init' 

    /opt/sqlite-autoconf-3070900/sqlite3.c:17638: undefined reference to `pthread_mutexattr_settype' 

    /opt/sqlite-autoconf-3070900/sqlite3.c:17639: undefined reference to `pthread_mutex_init' 

    /opt/sqlite-autoconf-3070900/sqlite3.c:17640: undefined reference to `pthread_mutexattr_destroy' 

    /opt/build/lib//libsqlite3.a(sqlite3.o): In function `unixDlClose': 

    /opt/sqlite-autoconf-3070900/sqlite3.c:29930: undefined reference to `dlclose' 

    /opt/build/lib//libsqlite3.a(sqlite3.o): In function `unixDlError': 

    /opt/sqlite-autoconf-3070900/sqlite3.c:29899: undefined reference to `dlerror' 

    /opt/build/lib//libsqlite3.a(sqlite3.o): In function `unixDlOpen': 

    /opt/sqlite-autoconf-3070900/sqlite3.c:29885: undefined reference to `dlopen' collect2: ld returned 1 exit status  

错误信息中提示有线程接口函数，需要线程的动态链接库，要加入-lpthread选项。在网上查找按照网友提供的资料dlopen(),dlclose(),dlerror(),dlsym()函数在头文件#include 中，同样需要添加编译选项-ldl。 

    # arm-linux-gcc -o test test.c -I /opt/build/include/ -L /opt/build/lib  -static -lsqlite3 -lpthread -ldl