[U-Boot] Function backtrace in uboot

Hi,  I would like to backtrace a function in uboot. The function " int backtrace (void **buffer, int size)"  uses header file "execinfo.h".  The header file is present inside my toolchain include folder. How can I add the include folder in my Makefile path so that I can use the functionality in the code.  With RegardsGIGIN