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|Home > Migrating from RVCT v4.0 to ARM Compiler v4.1 > Compiler changes between RVCT v4.0 and ARM Compiler v4.1|
Various changes have been made to armcc in ARM Compiler toolchain v4.1.
Sign rules on enumerators has changed in line with convention. Enumerator container is now unsigned unless a negative constant is defined. The RVCT v4.0 10Q1 patch made this change in GCC mode only.
-O3 no longer implies
--multifile option has always been available as a separate option and it
is recommended you put this into your builds.