main.o: In function `main':
/home/pi/progs/6/main.c:101: undefined reference to `clock_gettime'
/home/pi/progs/6/main.c:105: undefined reference to `clock_gettime'
collect2: ld returned 1 exit status
make: *** [all] Błąd 1

      clock_gettime(CLOCK_REALTIME, &ts1);

      printf("\nMeasurement no. %d.\tPWM = %d%\tTemp = %.3f \xC2\xB0 C", j, i, temperatura());

      clock_gettime(CLOCK_REALTIME, &ts2);

/home/pi/progs/4/z_forum/main.c:9: undefined reference to `lcdInit'
/home/pi/progs/4/z_forum/main.c:11: undefined reference to `lcdHome'
/home/pi/progs/4/z_forum/main.c:12: undefined reference to `lcdClear'

rm -rf wiringPi*

git clone git://git.drogon.net/wiringPi
cd wiringPi
./build

pi@raspberrypi ~ $ wget http://project-downloads.drogon.net/files/wiringPi.tgz
--2013-08-29 12:47:19--  http://project-downloads.drogon.net/files/wiringPi.tgz
Translacja project-downloads.drogon.net (project-downloads.drogon.net)... 195.10.226.169, 2a00:ce0:2:feed:beef:cafe:0:4
Łączenie się z project-downloads.drogon.net (project-downloads.drogon.net)|195.10.226.169|:80... połączono.
Żądanie HTTP wysłano, oczekiwanie na odpowiedź... 200 OK
Długość: 335974 (328K) [application/x-gzip]
Zapis do: `wiringPi.tgz.2'

100%[======================================>] 335.974      875K/s   w  0,4s   

2013-08-29 12:47:21 (875 KB/s) - zapisano `wiringPi.tgz.2' [335974/335974]

pi@raspberrypi ~ $ tar xfz wiringPi.tgz
pi@raspberrypi ~ $ cd wiringPi/wiringPi
pi@raspberrypi ~/wiringPi/wiringPi $ make
[Compile] wiringPi.c
[Compile] wiringPiFace.c
[Compile] wiringSerial.c
[Compile] wiringShift.c
[Compile] gertboard.c
[Compile] piNes.c
[Compile] lcd.c
[Compile] piHiPri.c
[Compile] piThread.c
[Compile] wiringPiSPI.c
[Compile] wiringPiI2C.c
wiringPiI2C.c: In function ‘wiringPiI2CRead’:
wiringPiI2C.c:43:3: warning: implicit declaration of function ‘i2c_smbus_read_byte’ [-Wimplicit-function-declaration]
wiringPiI2C.c: In function ‘wiringPiI2CReadReg8’:
wiringPiI2C.c:55:3: warning: implicit declaration of function ‘i2c_smbus_read_byte_data’ [-Wimplicit-function-declaration]
wiringPiI2C.c: In function ‘wiringPiI2CReadReg16’:
wiringPiI2C.c:60:3: warning: implicit declaration of function ‘i2c_smbus_read_word_data’ [-Wimplicit-function-declaration]
wiringPiI2C.c: In function ‘wiringPiI2CWrite’:
wiringPiI2C.c:72:3: warning: implicit declaration of function ‘i2c_smbus_write_byte’ [-Wimplicit-function-declaration]
wiringPiI2C.c: In function ‘wiringPiI2CWriteReg8’:
wiringPiI2C.c:84:3: warning: implicit declaration of function ‘i2c_smbus_write_byte_data’ [-Wimplicit-function-declaration]
wiringPiI2C.c: In function ‘wiringPiI2CWriteReg16’:
wiringPiI2C.c:89:3: warning: implicit declaration of function ‘i2c_smbus_write_word_data’ [-Wimplicit-function-declaration]
[Compile] softPwm.c
[Compile] softServo.c
[Compile] softTone.c
[Link (Dynamic)]
pi@raspberrypi ~/wiringPi/wiringPi $ sudo make install
[Install]
pi@raspberrypi ~/wiringPi/wiringPi $ cd ../gpio
pi@raspberrypi ~/wiringPi/gpio $ make
[Compile] gpio.c
[Link]
/usr/lib/gcc/arm-linux-gnueabihf/4.6/../../../libwiringPi.so: undefined reference to `i2c_smbus_write_byte'
/usr/lib/gcc/arm-linux-gnueabihf/4.6/../../../libwiringPi.so: undefined reference to `i2c_smbus_read_byte'
/usr/lib/gcc/arm-linux-gnueabihf/4.6/../../../libwiringPi.so: undefined reference to `i2c_smbus_write_byte_data'
/usr/lib/gcc/arm-linux-gnueabihf/4.6/../../../libwiringPi.so: undefined reference to `i2c_smbus_write_word_data'
/usr/lib/gcc/arm-linux-gnueabihf/4.6/../../../libwiringPi.so: undefined reference to `i2c_smbus_read_word_data'
/usr/lib/gcc/arm-linux-gnueabihf/4.6/../../../libwiringPi.so: undefined reference to `i2c_smbus_read_byte_data'
collect2: ld returned 1 exit status
make: *** [gpio] Błąd 1
pi@raspberrypi ~/wiringPi/gpio $

sudo: ./main.out: nie znaleziono polecenia