# Adding library file

**URL:** <https://forum.sierrawireless.com/t/adding-library-file/3102>\
**Category:** Legacy AirPrime modules\
**Created:** [April 4, 2009, 6:37am UTC](https://forum.sierrawireless.com/t/adding-library-file/3102 "2009-04-04T06:37:09Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![suma](https://avatars.discourse-cdn.com/v4/letter/s/22d042/32.png) [@suma](https://forum.sierrawireless.com/u/suma)\
**Post date:** [April 4, 2009, 6:37am UTC](https://forum.sierrawireless.com/t/adding-library-file/3102/1 "2009-04-04T06:37:09Z")

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hi,

working on Q2686,Firmware R71,IDE Eclipse,GCC complier.  
how to add a libray file to the project,for eg i want to add libm.a(is this the file required to support trignometric functions).Which math.h file has to be included to use trignometric functions.

Regards  
Suma.S  
[Suma@tovyaautomation.com](mailto:Suma@tovyaautomation.com)