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I just Started to work with CMSIS but when I Build a sample Code in my keil the following Error come up: core_cm3.c: error: C3900U: Unrecognized option '---'. I should mention that I have added the Drivers\include folder from CMSIS folder to include path option in my software but it seems it doesn't recognize some of the .h file that is located in that folder !!! Thanks
Without looking at the error code numbers, I must say that an error message that starts with the name of a C file sounds more like an error related to the compiler:
core_cm3.c: error: C3900U: Unrecognized option '---'.
www.keil.com/.../armcc_chr1359124244999.htm
Thanks guys for your replies The Version of the Keil is 4.74. But I have found the problem it was related to the name of CMSIS folder that has been put. it had space and charachter '-'.