How to compile glibc with -fPIC?

Question

I want to build a 'static toolchain', with option --disable-shared, for no shared library include/depend in the toolchain-self

cause I don't want the target binary runs depend on the toolchain, such as libc.so, ld-xxx.so.

But when the target binary need the function dlopen, it give a build error that libc.a need to recompile with -fPIC

So, how to compile glibc with -fPIC? or maybe I should ask is it possible to gen a shared library with
static toolchain?

Answer 1

or maybe i should ask is it possible to gen a shared library with static toolchain?

Yes, it is. To say a "static toolchain" effectively just means using different defaults. In fact you could probably do what you want with just a minor edit of gcc/gcc.c to add -static to LINK_COMMAND_SPEC. Although you would only want to add it if some option (perhaps --no-static?) where not present.