.\STM32303C-EVAL\Project.axf: Warning: L6373W: libattrs.map file not found in System Library directory D:\Program Files\ARM\ADSv1_2\LIB\armlib\. Library selection may be impaired.
.\STM32303C-EVAL\Project.axf: Warning: L6310W: Unable to find ARM libraries.
.\STM32303C-EVAL\Project.axf: Error: L6411E: No compatible library exists with a definition of startup symbol __main.