
c++ - GCC -fPIC option - Stack Overflow
2022年7月16日 · You can omit -fPIC when compiling a program or a static library, because only one main program will exist in a process, so no runtime relocation is ever necessary. On some systems, programs are still made position independent for enhanced security. I'll try to explain what has already been said in a simpler way.
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gcc -fPIC, -fpic, -fpie, -fPIE 选项 - 雪域蓝心 - 博客园
2020年2月10日 · Generate position-independent code (PIC) suitable for use in a shared library, if supported for the target machine. Such code accesses all constant addresses through a global …
关于 gcc/g++编译选项: -fPIC 功能的解释 - CSDN博客
2020年2月21日 · 为了解决载入时重定位的问题,引入了PIC的概念,即位置无关代码。 PIC实现原理: (1)GOT:在动态库的数据段增加GOT(Global Offset Table),该表的每一项是符号到地址的绝对映射。
linux编译动态库之fPIC - 知乎 - 知乎专栏
在生成动态库时,常常习惯性的加上fPIC选项,fPIC有什么作用和意义,加不加有什么区别,这里做下小结: fPIC的全称是 Position Independent Code, 用于生成位置无关代码。 什么是位置无关代码,个人理解是代码无绝对跳转,跳转都为相对跳转。 1、不加fPIC选项. 即使不加fPIC也可以生成.so文件,但是对于源文件有要求,例如. 因为不加fPIC编译的so必须要在加载到用户程序的地址空间时重定向所有表目,所以在它里面不能引用其它地方的代码. 如下: printf("haha …
What does -fPIC mean when building a shared library?
2013年1月28日 · PIC stands for Position Independent Code. To quote man gcc: If supported for the target machine, emit position-independent code, suitable for dynamic linking and avoiding any limit on the size of the global offset table. This option makes a difference on AArch64, m68k, PowerPC and SPARC.
C++——pic 与PIC的异同 - 会飞的斧头 - 博客园
2022年4月16日 · 为了兼容各个系统,在生成位置无关的代码的时候,应该使用-fPIC参数。 pic 与PIC的异同 相同点:都是为了在动态库中生成位置无关的代码。通过全局偏移表(GOT)访问所有常量地址。程序启动时动态加载程序解析GOT条目。
Code Gen Options (Using the GNU Compiler Collection (GCC))
Generate position-independent code (PIC) suitable for use in a shared library, if supported for the target machine. Such code accesses all constant addresses through a global offset table (GOT). The dynamic loader resolves the GOT entries when the program starts (the dynamic loader is not part of GCC; it is part of the operating system).
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2019年11月3日 · 代码整理如下: Frame_Pic.cpp #include "Frame_Pic.h" Frame_Pic::Frame_Pic(const Picture& pic, char c, char s, char t) : p(pic), corner(c), sideb
[cpp] PIC 옵션의 정체 - jiniya.net
2011年8月25日 · PIC라는건 Position Independent Code, 직역하면 위치 독립적인 코드 정도로 나온다. 난 지금껏 이 옵션이 재배치에 관한 옵션인줄 알았다. 즉, -fPIC을 지정하면 재배치 정보가 있어서 아무 주소에나 로드할 수 있고, 지정하지 않으면 고정 주소로 로드되는 뭐 그런걸 상상한 것이다. 한동안 그렇게 잘못된 지식을 가지고도 별 문제 없이 지냈는데 최근에 한 업체와 일을 하면서 잘못 알고 있었다는 것을 깨닫게 되었다. 반성하는 차원에서 PIC 옵션에 관한 내용을 정리해 놓는다.