Castle have got in contact to let us know that they have released version 5.6 of the RISC OS C Tools.

Mike Williams said "This new release includes fixes for all bugs reported through Castle's C support web pages and over 20 additional improvements/enhancements"

Principal Improvements

• Numerous code generation improvements.
  
• Improved checking of printf/scanf format strings.
  
• Improved compilation of (int) longlong, (int) longlong >> 32, and longlong >> 1 or << 1. Also, long long multiplication and division by powers of two transformed into shifts.
  
• Optimised handling of narrow (<32 bit) data and computations.

Principal Enhancements

• Added complex and imaginary number support as specified in C99 Annex G.
  
• _Bool, _Complex and _Imaginary now available in pcc and C90 modes.
  
• Support for switch on a long long expression.
  
• Added inter-statement compile-time evaluation of long long arithmetic.
  
• asm keyword recognised in C++ mode.
  
• IEEE 754 conformance improved; generally edging the compiler closer to C99 Annex F.

Current C Tools subscribers can download the new version from Castle's web site.

Link: RISC OS C Tools