$Id: //WIFI_SOC/MP/SDK_4_2_0_0/RT288x_SDK/source/user/iperf-2.0.5/INSTALL#1 $

Platform Specific Notes

FreeBSD

  If you use a cc or c++ other than the system one, threads may not be
  detected properly.  To work around this set the following environment 
  variables:

    setenv CC /usr/bin/cc
    setenv CXX /usr/bin/c++

