在初始ram文件系统上从源安装软件包

Question

I'm trying to install multiple packages into an initial ram file system. I'm using uclibc as my C library. This could be a stupid question but...

Would the compiled program also need a C library installed onto the initramfs ?

Am I right in thinking that when a program is compiled from source, it is compiled into some sort of executable? Will the application on the initramfs be ready to run once I have make install ed (with the correct prefix and providing dependencies are met )?

Answer 1

Whether a compiled program needs a C library - or any kind of library, for that matter - depends on how it was linked .

In general, if your program was linked statically then it does not have any external dependencies - it only needs a working kernel. The executable code of any library that it depends on will have been incorporated into the final executable.

If, on the other hand, it is linked dynamically , then it still needs the shared object files of the libraries it depends on. On Linux, most library shared objects (also known as shared libraries ) follow the convention of having a filename with either a .so extension or, in general, a *.so.* format. For example /lib/libssl3.so and /lib/libncurses.so.5.9 are both shared libraries on my system.

It is also possible to have an executable that is statically linked against some libraries and dynamically linked against others. A common case where this happens is when rare or proprietary libraries are linked in statically, while standard system libraries are linked in dynamically.