CCS/AFE4400: cannot find file "libmath.a" in CCSV7

Part Number:AFE4400

Tool/software: Code Composer Studio

hi TIer

When I debug AFE4400, there is an “cannot find file “”“libmath.a” errro ”。but i had include libmath in "${CCS_BASE_ROOT}/msp430/lib/5xx_6xx_FRxx" .at Include options.

Please give me some suggestions,thanks！