Can't compile code calling sin, cos, tan etc....

[PaulMadle]

Hi All,

I am having issues attempting to build code that include sin/cos/tan etc trig functions.... I am getting linker errors, e.g.

undefined reference to asin'`

I am guessing this is the wrong forum (sorry in advance) but I am wondering what I need to do to make these trig functions build? Where can I find the right link options/library that I need?

Many thanks in advance.

Paul.

[TonyHan11]

FYI: I can compile these functions successfully using GCC & IAR by adding #include "math.h", the results are also correct (optimization level: none).
Code:

	float ii;
	ii = sin(0.2);
	ii = cos(2.0);
	ii = tan(1.0);

Version info:
gcc version 8.2.1 20181213 (release) [gcc-8-branch revision 267074] (GNU Tools for Arm Embedded Processors 8-2018-q4-major)
IAR Embedded Workbench for ARM 7.80.2.11975
IAR Embedded Workbench shared components 7.54.4636