From RISC OS
LCC - Small fast C compiler for RISC OS
LCC for RISC OS is no longer maintained. You should use GCC in preference.
20th February 2003 - version 4.20
The current release is 4.20, and is a port to RISC OS of the latest released version. This version is a 32-bit version, and produces 32-bit code suitable for all RISC OS machines running the 32-bit SharedCLibrary.
It can also compile programs with a UnixLib.