SQLITE3在tiny6410上的移植

下载sqlite最新版本3.7.9 http://www.sqlite.org/download.html 源码包: sqlite-autoconf-3071400.tar.gz 解压源码包到/opt目录下： #tar xvzf sqlite-autoconf-3071400.tar.gz –C /opt/ 建立make install目录： # mkdir /opt/build 进入解压出得文件夹中： # cd /opt/sqlite-autoconf-3070900 执行configure命令:生成Makefile文件： # ./configure –-host=arm-linux –prefix=/opt/build 生成Makefile文件后,执行make命令:： # make #make install 完成之后可以发现，之前所建目录/opt/build下生成bin include lib share四个目录。主要用到的文件有./bin/sqlite3 ./include/sqlite3.h以及 ./lib/下的库文件。 bin文件夹下的sqlite3是sqlite可执行应用程序下载到板子Linux系统下的/bin目录或者/usr/bin目录下并添加文件可执行权限。在板子Linux系统命令行下执行：# chmod +x sqlite3 进入sqlite命令行，可以实现对数据库的管理。 [root@FriendlyARM plg]# sqlite3 sqlite version 3.7.9 2011-11-01 00:52:41 Enter ".help" for instructions Enter sql statements terminated with a ";" sqlite> ./include/sqlite3.h定义了sqlite的API接口会在有关sqlite的c文件交叉编译时用到。 ./lib/文件夹下是有关sqlite的静态链接库和动态链接库 # ls lib/ libsqlite3.a libsqlite3.la libsqlite3.so libsqlite3.so.0 libsqlite3.so.0.8.6 pkgconfig 其中libsqlite3.so和libsqlite3.so.0都是libsqlite3.so.0.8.6的软链接文件。真正需要下载到板子目录/lib下的动态库是libsqlite3.so.0.8.6。下载到板子后还需对它建立软链接文件因为可执行程序寻找的动态链接库的名字为libsqlite3.so.0。 # ln -s /lib/libsqlite3.so.0.8.6 /lib/libsqlite3.so.0 到此，sqlite的移植工作已经完成，下面进行测试。 测试程序test_sqlite.c如下： 1. #include <stdio.h> 2. #include <sqlite3.h> 3. 4. static int callback(void *NotUsed,int argc,char **argv,char **azColName) 5. { 6. int i; 7. for(i=0; i<argc; i++) 8. { 9. printf("%s = %s\n",azColName[i],argv[i] ? argv[i] : "NULL"); 10. } 11. printf("\n"); 12. return 0; 13. } 14. 15. int main(int argc,char **argv) 16. { 17. sqlite3 *db; 18. char *zErrMsg = 0; 19. int rc; 20. if( argc!=3 ) 21. { 22. fprintf(stderr,"Usage: %s DATABASE sql-STATEMENT\n",argv[0]); 23. } 24. rc = sqlite3_open(argv[1],&db); 25. if( rc ) 26. { 27. fprintf(stderr,"Can't open database: %s\n",sqlite3_errmsg(db)); 28. sqlite3_close(db); 29. } 30. rc = sqlite3_exec(db,argv[2],callback,&zErrMsg); 31. if( rc!=sqlITE_OK ) 32. { 33. fprintf(stderr,"sql error: %s\n",zErrMsg); 34. } 35. sqlite3_close(db); 36. return 0; 37. } 动态编译： # arm-linux-gcc -o test test_sqlite.c -I /opt/build/include/ -L /opt/build/lib/ -lsqlite3 注：-I制定优先搜索头文件路径： -L制定编译的时候，优先搜索库的路径。 下载到板子上执行： [root@FriendlyARM plg]#./test xyz.db "create table tbl0(name varchar(10),number smallint);" [root@FriendlyARM plg]#./test xyz.db "insert into tbl0 values('cyc',1);" [root@FriendlyARM plg]#./test xyz.db "insert into tbl0 values('dzy',2);" [root@FriendlyARM plg]#./test xyz.db "select * from tbl0;" name = cyc number = 1 name = dzy number = 2 测试成功！ 静态编译： # arm-linux-gcc -o test test_sqlite.c -I /opt/build/include/ -L /opt/build/lib/ -static -lsqlite3 /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 <dlfcn.h>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 编译成功：但有一个warning，没有解决，暂时没有发现这个警告对程序影响。 /opt/build/lib/libsqlite3.a(sqlite3.o): In function `unixDlOpen': /opt/sqlite-autoconf-3070900/sqlite3.c:29885: warning: Using 'dlopen' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking 静态编译与动态编译的差别在于：可执行文件较大，即使板子上没有移植动态链接库libsqlite3.so.0，程序也同样可以执行。