Undefined reference to `times'

[gayathri191855]

I want to calculate cpu time in main.c. After executing the makefile, I got the following linker error.

CC main.o
CC firmware.elf
/usr/lib/riscv64-unknown-elf/bin/ld: ../build//software/libc/libc.a(libc_time_clock.c.o): in function clock': /home/user/Desktop/Gayathri_examples/github_lab_examples/fpga_101/lab004/build/software/libc/../../../../../../../../pythondata-software-picolibc/pythondata_software_picolibc/data/newlib/libc/time/clock.c:73: undefined reference to times'
collect2: error: ld returned 1 exit status
make: *** [Makefile:18: firmware.elf] Error 1

I have no idea what happened. I didn't expect the error because I followed the instructions carefully. Can anyone tell me why I got this error and how to resolve it?
If my hardware doesn't support times, is there any way to calculate clock cycles taken by main.c in liteX?