Making all in linux
hardware.c: In function ‘print_freq’:
hardware.c:266:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if (HW_CPU_SHOW_MAXFREQ == filter && FAIL != maxfreq)
                                            ^
hardware.c:273:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  else if (HW_CPU_SHOW_CURFREQ == filter && FAIL != curfreq)
                                                 ^
hardware.c:282:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if (FAIL != curfreq)
            ^
hardware.c:285:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if (FAIL != maxfreq)
            ^
hardware.c: In function ‘SYSTEM_HW_CPU’:
hardware.c:361:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      FAIL != (maxfreq = get_cpu_max_freq(cur_cpu)))
           ^
proc.c: In function ‘proc_create’:
proc.c:1198:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (i = 0; i < cmdline_nbytes - 1; i++)
                 ^
swap.c: In function ‘get_swap_dev_stat’:
swap.c:140:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if (rdev_major == major(dev_st.st_rdev) && rdev_minor == minor(dev_st.st_rdev))
                  ^
swap.c:140:57: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if (rdev_major == major(dev_st.st_rdev) && rdev_minor == minor(dev_st.st_rdev))
...                                                         ^
Making all in zbxjson
json.c: In function ‘zbx_json_copy_string’:
json.c:656:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if (out - start == size)
                   ^