So what I am trying to do is on Ubuntu 14.04 (x86_64) I want to set up musl-libc based on the latest released 1.1.11 version which is available at this moment. What I did was to: Install multilib support for GCC: sudo apt-get –no-install-recommends install gcc-multilib Configure the libraries for 32-bit and 64-bit respectively and install them into separate folders: