Mrhoades-Desktop:dump1090 mrhoades$ sudo make
make: pkg-config: Command not found
cc -O2 -g -Wall -W  -c dump1090.c
dump1090.c:1784:17: warning: absolute value function 'abs' given an argument of
      type 'long long' but has parameter of type 'int' which may cause
      truncation of value [-Wabsolute-value]
            if (abs(a->even_cprtime - a->odd_cprtime) <= 10000) {
                ^
dump1090.c:1784:17: note: use function 'llabs' instead
            if (abs(a->even_cprtime - a->odd_cprtime) <= 10000) {
                ^~~
                llabs
1 warning generated.
make: pkg-config: Command not found
cc -O2 -g -Wall -W  -c anet.c
make: pkg-config: Command not found
cc -g -o dump1090 dump1090.o anet.o   -lpthread -lm
Undefined symbols for architecture x86_64:
  "_rtlsdr_close", referenced from:
      _main in dump1090.o
  "_rtlsdr_get_device_count", referenced from:
      _modesInitRTLSDR in dump1090.o
  "_rtlsdr_get_device_usb_strings", referenced from:
      _modesInitRTLSDR in dump1090.o
  "_rtlsdr_get_tuner_gain", referenced from:
      _modesInitRTLSDR in dump1090.o
  "_rtlsdr_get_tuner_gains", referenced from:
      _modesInitRTLSDR in dump1090.o
  "_rtlsdr_open", referenced from:
      _modesInitRTLSDR in dump1090.o
  "_rtlsdr_read_async", referenced from:
      _readerThreadEntryPoint in dump1090.o
  "_rtlsdr_reset_buffer", referenced from:
      _modesInitRTLSDR in dump1090.o
  "_rtlsdr_set_agc_mode", referenced from:
      _modesInitRTLSDR in dump1090.o
  "_rtlsdr_set_center_freq", referenced from:
      _modesInitRTLSDR in dump1090.o
  "_rtlsdr_set_freq_correction", referenced from:
      _modesInitRTLSDR in dump1090.o
  "_rtlsdr_set_sample_rate", referenced from:
      _modesInitRTLSDR in dump1090.o
  "_rtlsdr_set_tuner_gain", referenced from:
      _modesInitRTLSDR in dump1090.o
  "_rtlsdr_set_tuner_gain_mode", referenced from:
      _modesInitRTLSDR in dump1090.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [dump1090] Error 1
Mrhoades-Desktop:dump1090 mrhoades$ /dump1090 –interactive –net
-bash: /dump1090: No such file or directory
Mrhoades-Desktop:dump1090 mrhoades$ sudo ./dump1090 –interactive –net
sudo: ./dump1090: command not found
Mrhoades-Desktop:dump1090 mrhoades$ ls
Makefile    anet.c      dump1090.c  testfiles
README.md   anet.h      dump1090.o  tools
TODO        anet.o      gmap.html
Mrhoades-Desktop:dump1090 mrhoades$