awib generates either C source code or i386 Linux ELF executables. It is an optimizing compiler, turning strings of + or - commands into single instructions. The binaries produced by awib have been said to work with FreeBSD's Linux compatibility layer.
Programs compiled with awib use wrapping 8-bit cells, and the , command does not change the current cell if EOF is read. However, awib itself has been tested on Brainfuck implementations with 8-bit or 32-bit cells, and with , returning 0, -1, or no change on EOF.