问题
I am working on STM32l151rct6a by stm, I have stumbled upon these MACRO definitions
__CC_ARM, __ICCARM__, __GNUC__, __TASKING__
Does anyone know what they mean?
回答1:
These are different compilers for ARM processors, probably these macros are used to hide compiler-dependent stuff in code that's compilable by several compilers.
ICCARM--> IAR (there will also be a macro__IAR_SYSTEMS_ICC__that is set to the compiler platform version__IMAGECRAFT__--> Imagecraft C (also see Clifford's comments below - there's also a macro__ICC_VERSION__, see the pdf documentation)TASKING--> Tasking__CC_ARM--> ARM's (RealView) compiler__GNUC__--> gcc
回答2:
They are macros for identifying the compiler being used to build the code.
A list of such macros, and others for identifying architecture and OS etc. can be found at http://sourceforge.net/p/predef/wiki/Home/. It does not however comprehensively cover many compilers from smaller embedded systems vendors (Tasking and Imagecraft for example).
回答3:
These are compiler specific MACROS and defined in compiler code.For example __ICC is for IAR and __GNU is for GNU compilers.There are some code given in BSP part for STM platform which have dependency on compilers.
来源：https://stackoverflow.com/questions/17572519/what-do-the-cc-arm-iccarm-gnuc-and-tasking-macros-mean