I got this on Mac OS X at least.
Not sure if it shows up in other envs
error:
```
strerror_override.c:53:13: error: incompatible redeclaration of library function 'strerror' [-Werror,-Wincompatible-library-redeclaration]
const char *strerror(int errno_in)
```
Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>