Free C Compilers for Amiga?

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What are the options for free C Compilers on Amiga ..?
Both under AmigaOS-68k environment and crosscompiled from Unix.

Ie like Borland Turbo C & Bcc..

(assembler can be handy too)

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What compiler would parse anfs ?

Anyway if I use GCC, will the binaries be alright? I have the feeling those executables re fine on multi-MHz and multi-MB machines with swap.. but not much else

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Need the source to seriously tweak it..

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My concern regarding GCC was how the binariers used would turn out. The system requirements of the compile process is a lesser concern because it's most likely will be done using cross compilation if possible. As that would be way faster.

The problem with SAS/C is getting the bits..
(I proberbly has it on a few floppies which I think I know where they are which can be read in a likely working amiga computer which perhaps would like to do some RS232 - now where is improbability drive when you need it! )

The most desired setup considering the answers here would be a unix system running DICE using SAS/C Makefiles to produce binaries which is then tested with UAE.

I have done SAS/C years ago with 1 MB A500 using a floppy drive.. *pain* but it made it possible to code C at home..! then I got a HDD.. tight memory but less pain. Had to quit editor for each compile to free upp memory.. no swap.

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You should have bought yourself

Problem was that those cash were hard to get by

I recall calculating the cost for a 20 MB RAM disk for the C64 long before that. But would it would have ended with a cost of 11 000 USD..
(I contemplated the possibility to have 8 slow (2 MHz) 6510 CPUs sharing the bus in a true multicore setup as well)