在不依赖任何共享库的Linux上构建可执行文件

Question

Environment: Ubuntu 14.04. gcc 4.8.2

I am working on a C++ console application. When I run "ldd" on the executable, I see the following:

linux-vdso.so.1 =>  (0x00007fffe495e000)
libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f9ffa754000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f9ffa38e000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f9ffa087000)
/lib64/ld-linux-x86-64.so.2 (0x00007f9ffaa6e000)
libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f9ff9e71000

I am wondering if it is possible to define flags on gcc/linker such that the final executable does not depend on any shared libraries.

Answer 1

Simply add -static while linking :-)

Static linking should be avoided not only for security reasons.

BTW: As I know there is no way to create a static lib from a dynamic one. So if you have only the shared lib, you can't link static.