If we do wish to use printf() or other text output functions, the Newlib documentation tells us that we need to implement a global function int _write(int handle, char* data, int size).

To compile this code, run GCC with the following options: gcc -Wall -O2 -fpic -shared -ldl -o shim.so shim.c This command creates a shared library called shim.so from the shim.c source code file. Then ...