이클립스에서 WiFi 라이브러리를 Import 받았을때 아래와 같이 파일을 찾을수 없다고
나온다면 다음과 같이 처리하면 된다.

09:39:27 **** Incremental Build of configuration Release for project TemptClient ****
make all 
'Building file: C:/Applications/arduino-1.0.6/libraries/WiFi/utility/server_drv.cpp'
'Invoking: AVR C++ Compiler'
avr-g++ -I"C:\Applications\arduino-1.0.6\hardware\arduino\cores\arduino" -I"C:\Applications\arduino-1.0.6\hardware\arduino\variants\standard" -I"C:\Projects\89.IOTSolutions\02.Solutions\TemptClient" -I"C:\Applications\arduino-1.0.6\libraries\WiFi" -D__IN_ECLIPSE__=1 -DUSB_VID= -DUSB_PID= -DARDUINO=106 -Wall -Os -ffunction-sections -fdata-sections -fno-exceptions -g -mmcu=atmega328p -DF_CPU=16000000UL -MMD -MP -MF"WiFi/utility/server_drv.d" -MT"WiFi/utility/server_drv.d"  -c -o "WiFi/utility/server_drv.o" -x c++ "C:/Applications/arduino-1.0.6/libraries/WiFi/utility/server_drv.cpp"
'Finished building: C:/Applications/arduino-1.0.6/libraries/WiFi/utility/server_drv.cpp'
' '
'Building file: C:/Applications/arduino-1.0.6/libraries/WiFi/utility/socket.c'
'Invoking: AVR Compiler'
avr-gcc -I"C:\Applications\arduino-1.0.6\hardware\arduino\cores\arduino" -I"C:\Applications\arduino-1.0.6\hardware\arduino\variants\standard" -I"C:\Projects\89.IOTSolutions\02.Solutions\TemptClient" -I"C:\Applications\arduino-1.0.6\libraries\WiFi" -D__IN_ECLIPSE__=1 -DARDUINO=106 -DUSB_PID= -DUSB_VID= -Wall -Os -g -mmcu=atmega328p -DF_CPU=16000000UL -MMD -MP -MF"WiFi/utility/socket.d" -MT"WiFi/utility/socket.d"  -c -o "WiFi/utility/socket.o" "C:/Applications/arduino-1.0.6/libraries/WiFi/utility/socket.c"
'Finished building: C:/Applications/arduino-1.0.6/libraries/WiFi/utility/socket.c'
' '
'Building file: C:/Applications/arduino-1.0.6/libraries/WiFi/utility/spi_drv.cpp'
'Invoking: AVR C++ Compiler'
avr-g++ -I"C:\Applications\arduino-1.0.6\hardware\arduino\cores\arduino" -I"C:\Applications\arduino-1.0.6\hardware\arduino\variants\standard" -I"C:\Projects\89.IOTSolutions\02.Solutions\TemptClient" -I"C:\Applications\arduino-1.0.6\libraries\WiFi" -D__IN_ECLIPSE__=1 -DUSB_VID= -DUSB_PID= -DARDUINO=106 -Wall -Os -ffunction-sections -fdata-sections -fno-exceptions -g -mmcu=atmega328p -DF_CPU=16000000UL -MMD -MP -MF"WiFi/utility/spi_drv.d" -MT"WiFi/utility/spi_drv.d"  -c -o "WiFi/utility/spi_drv.o" -x c++ "C:/Applications/arduino-1.0.6/libraries/WiFi/utility/spi_drv.cpp"
'Finished building: C:/Applications/arduino-1.0.6/libraries/WiFi/utility/spi_drv.cpp'
' '
'Building file: C:/Applications/arduino-1.0.6/libraries/WiFi/utility/wifi_drv.cpp'
'Invoking: AVR C++ Compiler'
avr-g++ -I"C:\Applications\arduino-1.0.6\hardware\arduino\cores\arduino" -I"C:\Applications\arduino-1.0.6\hardware\arduino\variants\standard" -I"C:\Projects\89.IOTSolutions\02.Solutions\TemptClient" -I"C:\Applications\arduino-1.0.6\libraries\WiFi" -D__IN_ECLIPSE__=1 -DUSB_VID= -DUSB_PID= -DARDUINO=106 -Wall -Os -ffunction-sections -fdata-sections -fno-exceptions -g -mmcu=atmega328p -DF_CPU=16000000UL -MMD -MP -MF"WiFi/utility/wifi_drv.d" -MT"WiFi/utility/wifi_drv.d"  -c -o "WiFi/utility/wifi_drv.o" -x c++ "C:/Applications/arduino-1.0.6/libraries/WiFi/utility/wifi_drv.cpp"
'Finished building: C:/Applications/arduino-1.0.6/libraries/WiFi/utility/wifi_drv.cpp'
' '
'Building file: C:/Applications/arduino-1.0.6/libraries/WiFi/WiFi.cpp'
'Invoking: AVR C++ Compiler'
avr-g++ -I"C:\Applications\arduino-1.0.6\hardware\arduino\cores\arduino" -I"C:\Applications\arduino-1.0.6\hardware\arduino\variants\standard" -I"C:\Projects\89.IOTSolutions\02.Solutions\TemptClient" -I"C:\Applications\arduino-1.0.6\libraries\WiFi" -D__IN_ECLIPSE__=1 -DUSB_VID= -DUSB_PID= -DARDUINO=106 -Wall -Os -ffunction-sections -fdata-sections -fno-exceptions -g -mmcu=atmega328p -DF_CPU=16000000UL -MMD -MP -MF"WiFi/WiFi.d" -MT"WiFi/WiFi.d"  -c -o "WiFi/WiFi.o" -x c++ "C:/Applications/arduino-1.0.6/libraries/WiFi/WiFi.cpp"
C:/Applications/arduino-1.0.6/libraries/WiFi/WiFi.cpp:20:22: error: wifi_drv.h: No such file or directory
C:/Applications/arduino-1.0.6/libraries/WiFi/WiFi.cpp:26:21: error: debug.h: No such file or directory
C:/Applications/arduino-1.0.6/libraries/WiFi/WiFi.cpp: In static member function 'static void WiFiClass::init()':
C:/Applications/arduino-1.0.6/libraries/WiFi/WiFi.cpp:41: error: 'WiFiDrv' has not been declared
C:/Applications/arduino-1.0.6/libraries/WiFi/WiFi.cpp: In static member function 'static uint8_t WiFiClass::getSocket()':
C:/Applications/arduino-1.0.6/libraries/WiFi/WiFi.cpp:53: error: 'NO_SOCKET_AVAIL' was not declared in this scope
C:/Applications/arduino-1.0.6/libraries/WiFi/WiFi.cpp: In static member function 'static char* WiFiClass::firmwareVersion()':
C:/Applications/arduino-1.0.6/libraries/WiFi/WiFi.cpp:58: error: 'WiFiDrv' has not been declared
C:/Applications/arduino-1.0.6/libraries/WiFi/WiFi.cpp: In member function 'int WiFiClass::begin(char*)':
C:/Applications/arduino-1.0.6/libraries/WiFi/WiFi.cpp:66: error: 'WiFiDrv' has not been declared
C:/Applications/arduino-1.0.6/libraries/WiFi/WiFi.cpp:70: error: 'WL_DELAY_START_CONNECTION' was not declared in this scope
C:/Applications/arduino-1.0.6/libraries/WiFi/WiFi.cpp:71: error: 'WiFiDrv' has not been declared

프로젝트를 선택하고 “Properties > C/C++ General > Paths and Symbols” 를 선택한후 “GNU C++” 을 선택한다.

Add 버튼을 눌러 아래와 같이 “/프로젝트명/WIFI/utility”를 넣고, “Is a workspace path”를 체크한 후 “OK”를 누르면 된다.