C Library for FuSa

Hello!

First of all, I am very new to Keil uVision.

I downloaded Arm Compiler 6.6 C Library for Functional Safety 6.6.B. Did the installation and saved it to Keil_v5/ARM/ARM_Clib. Then added the ARM_Clib/include to Options->C/C++ (AC6)->Include Paths.

I am trying to use the isinf(x) function from math.h, but when I try to compile I get this error:

.\Objects\myproject.axf: Error: L6218E: Undefined symbol __ARM_isinff (referred from mylibrary.o).
Not enough information to list image symbols.
Not enough information to list load addresses in the image map.

extern of this __ARM_isinff is defined in the end of the math.h file, but from there it leads to nowhere (nothing happens when I try to go to the definition of it).

Am I missing some steps in my setup?