scons: Reading SConscript files ...
/bin/sh: pkg-config: not found
<type 'exceptions.OSError'>: 'pkg-config --cflags libelf' exited 127:
  File "/home/elite/eth3/SConstruct", line 25:
    env.MergeFlags('!pkg-config --cflags libelf')
  File "/usr/lib/scons/SCons/Environment.py", line 654:
    args = self.ParseFlags(args)
  File "/usr/lib/scons/SCons/Environment.py", line 643:
    do_parse(arg, do_parse)
  File "/usr/lib/scons/SCons/Environment.py", line 531:
    arg = self.backtick(arg[1:])
  File "/usr/lib/scons/SCons/Environment.py", line 468:
    raise OSError("'%s' exited %s" % (command, status))