make
cc -o slstatus -L/usr/local/lib -s components/battery.o components/cat.o components/cpu.o components/datetime.o components/disk.o components/entropy.o components/hostname.o components/ip.o components/kernel_release.o components/keyboard_indicators.o components/keymap.o components/load_avg.o components/netspeeds.o components/num_files.o components/ram.o components/run_command.o components/swap.o components/temperature.o components/uptime.o components/user.o components/volume.o components/wifi.o util.o slstatus.o -lX11
ld: error: undefined symbol: sioctl_open
>>> referenced by volume.c
>>>               components/volume.o:(vol_perc)

ld: error: undefined symbol: sioctl_ondesc
>>> referenced by volume.c
>>>               components/volume.o:(vol_perc)

ld: error: undefined symbol: sioctl_onval
>>> referenced by volume.c
>>>               components/volume.o:(vol_perc)

ld: error: undefined symbol: sioctl_nfds
>>> referenced by volume.c
>>>               components/volume.o:(vol_perc)

ld: error: undefined symbol: sioctl_pollfd
>>> referenced by volume.c
>>>               components/volume.o:(vol_perc)

ld: error: undefined symbol: sioctl_revents
>>> referenced by volume.c
>>>               components/volume.o:(vol_perc)

ld: error: undefined symbol: sioctl_close
>>> referenced by volume.c
>>>               components/volume.o:(cleanup)

ld: error: undefined symbol: kvm_openfiles
>>> referenced by swap.c
>>>               components/swap.o:(getswapinfo)

ld: error: undefined symbol: kvm_getswapinfo
>>> referenced by swap.c
>>>               components/swap.o:(getswapinfo)

ld: error: undefined symbol: kvm_close
>>> referenced by swap.c
>>>               components/swap.o:(getswapinfo)
>>> referenced by swap.c
>>>               components/swap.o:(getswapinfo)
cc: error: linker command failed with exit code 1 (use -v to see invocation)
*** Error code 1

Stop.