Some platforms do not have a working linker present. The goal is to
only test the loading of a shared library in clang-repl. A precompiled
library is used instead.
The cstdio header may also not be present. We only need printf.
Related discussion in D141824
Differential Revision: https://reviews.llvm.org/D148992
This commit adds the %lib <file> command to load a dynamic library to be
used by the currently running interpreted code.
For example `%lib libSDL2.so`.
Differential Revision: https://reviews.llvm.org/D141824
