Experimental for the moment but it works: a free 26/32 bit neutral C/C++ compiler
Developers of RISC OS software now have a choice of two compilers for producing 26/32 bit neutral code: Castle's tools and as of today, GCC. GCC for RISC OS is a free compiler developed by a team of hardworking programmers and has recently enjoyed a second 2.95.4 release. Peter Naulls has just now pointed out that he's released his unofficial and experimental version of the C/C++ compiler that can build 26/32 bit neutral code.
"Experimental. No support. Enjoy", is all we got out of him. All the information and downloads you need can be found from the link below.