浅谈Linux C语言动态库及静态库
<p>假设在math目录下已编辑好add.c sub.c div.c mul.c func_point.c文件，func_point.c为包含main（）的源文件！</p>
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<span><strong>动态库的制作：</strong></span></p>
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<span><strong>方法一：</strong></span></p>
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<code class="xhtml plain">gcc -c -fPIC add.c sub.c div.c mul.c //-c表示生成.o目标文件,-f后加一些编译选项，PIC表示与位置无关</code>
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<code class="xhtml plain">gcc -shared -o libmymath.so add.o sub.o mul.o div.o//创建共享库mymath，添加add.o,sub.o,mul.o,div.o目标文件</code>
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<code class="xhtml plain">sudo mv libmymath.so /usr/lib</code>
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<code class="xhtml plain">gcc func_point.c -lmymath//-l后面加动态链接库名字</code>
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<span><strong>方法二：</strong></span></p>
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<code class="xhtml plain">gcc -c -fPIC add.c sub.c div.c mul.c //-c:生成.o目标文件,-f后加一些编译选项，PIC表示与位置无关</code>
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<code class="xhtml plain">gcc -shared -o libmymath.so add.o sub.o mul.o div.o//创建共享库mymath，添加add.o，sub.o mul.o div.o目标文件</code>
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<code class="xhtml plain">export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:.//注意此操作后把当前目录加入环境变量中</code>
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<code class="xhtml plain">gcc func_point.c -L. -lmymath//-l后面加动态链接库名字</code>
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<span><strong>方法三：</strong></span></p>
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<code class="xhtml plain">gcc -c -fPIC add.c sub.c div.c mul.c //-c:生成.o目标文件,-f后加一些编译选项，PIC表示与位置无关</code>
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<code class="xhtml plain">gcc -shared -o libmymath.so add.o sub.o mul.o div.o//创建共享库mymath，添加add.o，sub.o mul.o div.o目标文件</code>
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<code class="xhtml plain">sudo vi /etc/ld.so.conf//把你的动态库路径加入此文件中</code>
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<code class="xhtml plain">sudo ldconfig</code>
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<code class="xhtml plain">gcc func_point.c -L. -lmymath//-l后面加动态链接库名字</code>
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ldd 显示可执行程序所需的共享库。</p>
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定义好框架，不断增加动态库！！</p>
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<span><strong>静态库制作：</strong></span></p>
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ar -crs libmymath.a add.o sub.o div.o mul.o/*创建静态库mymath，添加add.o,sub.o,mul.o,div.o，-c:创建归档文件 -r:插入 -s:若归档文件中包含了对象模式，可利用此参数建立备存文件的符号表 ar -crs libmymath.a *.o */<br>
gcc func_point.c -L. -lmymath//-L在哪个目录下找库 -l找哪个库，-lm可以链接到标准算数库，-lpthread可以连接到Linux标准线程库<br>
ar -d libmymath.a add.o//删除一个<br>
ar -r libmymath.a add.o//增加一个</p>
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静态库在程序链接时用到，链接器把程序所需的代码从静态库中拷贝到可执行程序中，可执行程序会增大；动态库在程序加载时用到，程序在加载时，会先检查需要哪些动态库连接，然后从内存中找到这些动态库的地址，最后加载动态库运行程序。</p>
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以上这篇浅谈Linux C语言动态库及静态库就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。</p>
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