The Amsterdam Compiler Kit (ACK) is a fast, lightweight and retargetable compiler suite and toolchain written by Andrew Tanenbaum and Ceriel Jacobs, and is MINIX's native toolchain. The ACK was originally closed-source software (that allowed binaries to be distributed for MINIX as a special case), but in April 2003 it was released under an open source BSD license. It has frontends for programming languages C, Pascal, Modula-2, Occam, and BASIC.
The ACK achieves maximum portability by using an intermediate language using bytecode, called EM. Each language front-end produces EM object files, which are then processed through several generic optimisers before being translated by a back-end into native machine code.
ACK comes with a generic linker and librarian capable of manipulating files in the ACK's own a.out-based format; it will work on files containing EM code as well as native machine code. However, EM code cannot be linked to native machine code without translating the EM binary first.
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* Version 6.0
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