如何重新编译-fPIC [英] how to recompile with -fPIC

问题描述

我正在尝试重新安装我的ffmpeg，遵循我的ARM Ubuntu上的指南机。
Unfortunatley，当我编译一个使用这个lib的程序时，我得到以下失败：

I was trying to reinstall my ffmpeg, following this guide, on my ARM Ubuntu machine. Unfortunatley, when I compile a program which uses this lib I get the following failure:

/usr/bin/ld: /usr/local/lib/libavcodec.a(amrnbdec.o): relocation R_ARM_MOVW_ABS_NC against `a local symbol' can not be used when making a shared object; recompile with -fPIC
/usr/local/lib/libavcodec.a: could not read symbols: Bad value
collect2: ld returned 1 exit status

现在我想用-fPIC重新编译，就像编译器所建议的那样，但我不知道如何。任何帮助是赞赏。

Now I would like to recompile it with -fPIC like the compiler is suggesting but I have no idea how. Any help is appreciated.

推荐答案

简而言之，错误意味着您不能使用静态库来链接动态一个。
正确的方法是将libavcodec编译为.so而不是.a，所以您尝试构建的另一个.so库链接很好。

in brief, the error means that you can't use a static library to be linked w/ a dynamic one. The correct way is to have a libavcodec compiled into .so instead of .a, so the other .so library you are trying to build will link well.

最短的方法是在 ./ configure 选项中添加 - 启用共享。
甚至你可以尝试禁用共享（或静态）库...你选择什么适合你！

the shortest way to do so is to add --enable-shared at ./configure options. or even you may try to disable shared (or static) libraries at all... you choose what is suitable for you!

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