📄 berkeleydb安装 - berkeley db 中国讨论区 - powered by ofstar_net.htm
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berkeleyDB安装</span><br>
<span class="tpc_content"><br><br>我们以redhat9为例开始介绍其安装过程:<br /><br /> 从其sleepycat公司官网的下载页<a href='http://dev.sleepycat.com/downloads/releasehistorybdb.html' target=_blank>http://dev.sleepycat.com/downloads/releasehistorybdb.html</a>获得其安装包,现在已经更新到4.4.20.<br /> #tar zxfv db-4.x.tgz<br /> #cd db-4.x/build_unix<br /><br /> 1. 如果以gcc编译的话,进行以下操作:<br /> #vi /dist/configure 在最前面添加:CC gcc<br /> #../dist/configure <br /> #make<br /> #make install<br /> 默认状态,berkeleyDB的lib和include将被安装到/usr/local/BerkeleyDB/下,需要更改这个路径的话,可以将 #../dist/configure一步加上选项--prefix,例如:#../dist/configure --prefix=/opt/BerkeleyDB.<br /> #vi /etc/ld.so.conf 并将berkeleyDB的lib路径加到该文件的最后一行,这样才能找到并加载它的库文件.ld.so.conf是什么东西？它就是系统动态链接库的配置文件。此文件内,存放着可被LINUX共享的动态链接库所在目录的名字(系统目录/lib,/usr/lib除外)，各个目录名间以空白字符(空格，换行等)或冒号或逗号分隔。<br /> #ldconfig<br /> <br /> 2. 如果以armgcc编译的话,进行以下操作:<br /> 先安装armgcc,对我说就是在/mnt/setup/program/FFT/FFT-2410光盘-V3.0/linux开发/linux交叉编译器/tool或者在gmail中附件里armgcc目录下(除了cross-armv4l-qtE-custom-1.5-3mz.i386.rpm,其他都装)<br /> #cp /mnt/setup/program/FFT/FFT-2410光盘-V3.0/linux开发/linux交叉编译器/tool /usr/tmp/<br /> #cd /usr/tmp/tool<br /> #rpm -ivh *<br /> #ldconfig<br /> 这一系列的工具将默认被装到/opt/host/arm41下.<br /><br /> 安装db-4.4.20.tgz,你甚至可以直接修改configure文件.而对于4.3.29,则不可直接修改configure文件.<br /> #tar zxfv db-4.x.tgz<br /> #cd db-4.x/build_unix<br /> <br /> #vi /dist/configure<br /> 在最前面添加以下几行:<br /> CC=/opt/host/armv4l/bin/armv4l-unknown-linux-gcc<br /> AR=/opt/host/armv4l/bin/armv4l-unknown-linux-ar<br /> RANLIB=/opt/host/armv4l/bin/armv4l-unknown-linux-ranlib<br /> STRIP=/opt/host/armv4l/bin/armv4l-unknown-linux-strip<br /><br /> #../dist/configure --prefix=/opt/db --host=arm41-unknown-linux(这样的话,berkeleyDB的lib和include将被装到/opt/db下.)<br /><br /> 或者:<br /> #env CC=/opt/host/armv4l/bin/armv4l-unknown-linux-gcc \<br /> AR=/opt/host/armv4l/bin/armv4l-unknown-linux-ar \<br /> RANLIB=/opt/host/armv4l/bin/armv4l-unknown-linux-ranlib \<br /> STRIP=/opt/host/armv4l/bin/armv4l-unknown-linux-strip \<br /> ../dist/configure --prefix=/opt/db --host=arm41-unknown-linux<br /><br /> #make<br /> #make install<br /> #vi /etc/ld.so.conf 并将berkeleyDB的lib路径加到该文件的最后一行,在这里就是/opt/db/lib<br /> #ldconfig<br /><br />详见: <a href='http://www.sleepycat.com/docs/ref/build_unix/intro.html' target=_blank>http://www.sleepycat.com/docs/ref/build_unix/intro.html</a><br />附上一段经典的检测是否装好的代码,同时也可以利用该代码入门:<br />#include <db.h><br />#include <stdio.h><br />#include <stdlib.h><br />#include <pthread.h><br /><br />/* DB的函数执行完成后，返回0代表成功，否则失败 */<br />void print_error(int ret)<br />{<br /> if(ret != 0)<br /> printf("ERROR: %s\n",db_strerror(ret));<br />}<br /><br />/* 数据结构DBT在使用前，应首先初始化，否则编译可通过但运行时报参数错误 */<br />void init_DBT(DBT * key, DBT * data)<br />{<br /> memset(key, 0, sizeof(DBT));<br /> memset(data, 0, sizeof(DBT));<br />}<br /><br />void main(void)<br />{<br /> DB *dbp; <br /> DBT key, data;<br /> u_int32_t flags; <br /> int ret;<br /><br /> char *fruit = "apple";<br /> int number = 15;<br /> <br /> typedef struct customer<br /> {<br /> int c_id;<br /> char name[10];<br /> char address[20];<br /> int age;<br /> } CUSTOMER;<br /> CUSTOMER cust;<br /> int key_cust_c_id = 1;<br /><br /> cust.c_id = 1;<br /> strncpy(cust.name, "javer", 9);<br /> strncpy(cust.address, "chengdu", 19);<br /> cust.age = 32;<br /><br /> /* 首先创建数据库句柄 */<br /> ret = db_create(&dbp, NULL, 0);<br /> print_error(ret);<br /> <br /> /* 创建数据库标志 */<br /> flags = DB_CREATE; <br /><br /> /* 创建一个名为single.db的数据库，使用B+树访问算法，本段代码演示对简单数据类型的处理 */<br /> ret = dbp->open(dbp, NULL, "single.db", NULL, DB_BTREE, flags, 0);<br /> print_error(ret);<br /><br /> init_DBT(&key, &data);<br /> <br /> /* 分别对关键字和数据赋值和规定长度 */<br /> key.data = fruit;<br /> key.size = strlen(fruit) + 1;<br /> data.data = &number;<br /> data.size = sizeof(int);<br /><br /> /* 把记录写入数据库中，不允许覆盖关键字相同的记录 */<br /> ret = dbp->put(dbp, NULL, &key, &data,DB_NOOVERWRITE);<br /> print_error(ret);<br /> <br />/* 手动把缓存中的数据刷新到硬盘文件中，实际上在关闭数据库时，数据会被自动刷新 */<br />dbp->sync()；<br /> <br />init_DBT(&key, &data);<br /><br /> key.data = fruit;<br /> key.size = strlen(fruit) + 1;<br /> <br /> /* 从数据库中查询关键字为apple的记录 */<br /> ret = dbp->get(dbp, NULL, &key, &data, 0);<br /> print_error(ret);<br /><br /> /* 特别要注意数据结构DBT的字段data为void *型，所以在对data赋值和取值时，要做必要的类型转换。 */<br /> printf("The number = %d\n", *(int*)(data.data));<br /> <br /> if(dbp != NULL)<br /> dbp->close(dbp, 0);<br /><br /> ret = db_create(&dbp, NULL, 0);<br /> print_error(ret);<br /><br /> flags = DB_CREATE; <br /><br /> /* 创建一个名为complex.db的数据库，使用HASH访问算法，本段代码演示对复杂数据结构的处理 */<br /> ret = dbp->open(dbp, NULL, "complex.db", NULL, DB_HASH, flags, 0);<br /> print_error(ret);<br /><br /> init_DBT(&key, &data);<br /><br /> key.size = sizeof(int);<br /> key.data = &(cust.c_id);<br /><br /> data.size = sizeof(CUSTOMER);<br /> data.data = &cust;<br /><br /> ret = dbp->put(dbp, NULL, &key, &data,DB_NOOVERWRITE);<br /> print_error(ret);<br /> <br /> memset(&cust, 0, sizeof(CUSTOMER));<br /> <br /> key.size = sizeof(int);<br /> key.data = &key_cust_c_id;<br /><br /> data.data = &cust;<br /> data.ulen = sizeof(CUSTOMER);<br /> data.flags = DB_DBT_USERMEM;<br /><br /> dbp->get(dbp, NULL, &key, &data, 0);<br /> print_error(ret);<br /> <br /> printf("c_id = %d name = %s address = %s age = %d\n",<br /> cust.c_id, cust.name, cust.address, cust.age);<br /> <br /> if(dbp != NULL)<br /> dbp->close(dbp, 0);<br />}<br /> 我们以gcc编译为例:<br /> gcc test.c -ggdb -I/usr/local/BerkeleyDB.4.3/include/ -L/usr/local/BerkeleyDB.4.3/lib/ -ldb -lpthread,如果你用的是eclipse之类的工具的话,记得加上-I,-L,-l的选项哦.<br /> 如果运行时报错:error while loading shared libraries:libdb-4.3.so: cannot open shared object file: No such file or directory的错误(小乌碰到过),请检查一下是否把berkeleyDB的lib路径加入到/etc/ld.so.conf中.<br></span>
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<span class="tpc_content"><br><br>在Linux下编译的时候，应该是CC=gcc吧？<br /><br />我编译C++的库，与官方文档说的方法有所不同：<br />export CC=gcc<br />export CXX=g++<br />cd build_unix<br />../dist/configure --enable-cxx<br />make<br />make install<br /><br />按照官方文档的方法只能编译出支持C的库，无法支持C＋＋<br></span>
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<span class="tpc_content"><br><br>我按照上面的方法安装后,在测试里面的例子的时候总是报错:<br />./a.out: error while loading shared libraries: libdb-4.5.so : cannot open shared objects file:No such file or directory<br />不知道是怎么回事,请教各位了!!<br></span>
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