g++ -std=c++14 -g -Wall -Werror=vla -MMD   -c -o basic.o basic.cc
g++ -std=c++14 -g -Wall -Werror=vla -MMD   -c -o decorator.o decorator.cc
g++ -std=c++14 -g -Wall -Werror=vla -MMD   -c -o exception.o exception.cc
g++ -std=c++14 -g -Wall -Werror=vla -MMD   -c -o flip.o flip.cc
g++ -std=c++14 -g -Wall -Werror=vla -MMD   -c -o image.o image.cc
g++ -std=c++14 -g -Wall -Werror=vla -MMD   -c -o main.o main.cc
g++ -std=c++14 -g -Wall -Werror=vla -MMD   -c -o rotate.o rotate.cc
g++ -std=c++14 -g -Wall -Werror=vla -MMD   -c -o sepia.o sepia.cc
g++ -std=c++14 -g -Wall -Werror=vla -MMD basic.o decorator.o exception.o flip.o image.o main.o rotate.o sepia.o -o a4q3
basic.o: In function `BasicImage::render(PPM&)':
/u5/rriachi/cs246/1179/a4/provided-files/q3/basic.cc:20: undefined reference to `operator>>(std::istream&, PPM&)'
flip.o: In function `flip::render(PPM&)':
/u5/rriachi/cs246/1179/a4/provided-files/q3/flip.cc:14: undefined reference to `PPM::getHeight()'
/u5/rriachi/cs246/1179/a4/provided-files/q3/flip.cc:15: undefined reference to `PPM::getWidth()'
/u5/rriachi/cs246/1179/a4/provided-files/q3/flip.cc:16: undefined reference to `PPM::getWidth()'
/u5/rriachi/cs246/1179/a4/provided-files/q3/flip.cc:17: undefined reference to `PPM::getWidth()'
/u5/rriachi/cs246/1179/a4/provided-files/q3/flip.cc:18: undefined reference to `PPM::getPixels()'
/u5/rriachi/cs246/1179/a4/provided-files/q3/flip.cc:19: undefined reference to `PPM::getPixels()'
/u5/rriachi/cs246/1179/a4/provided-files/q3/flip.cc:19: undefined reference to `PPM::getPixels()'
/u5/rriachi/cs246/1179/a4/provided-files/q3/flip.cc:20: undefined reference to `PPM::getPixels()'
main.o: In function `main':
/u5/rriachi/cs246/1179/a4/provided-files/q3/main.cc:27: undefined reference to `PPM::PPM()'
/u5/rriachi/cs246/1179/a4/provided-files/q3/main.cc:61: undefined reference to `operator<<(std::ostream&, PPM&)'
/u5/rriachi/cs246/1179/a4/provided-files/q3/main.cc:66: undefined reference to `PPM::~PPM()'
/u5/rriachi/cs246/1179/a4/provided-files/q3/main.cc:27: undefined reference to `PPM::~PPM()'
rotate.o: In function `rotate::render(PPM&)':
/u5/rriachi/cs246/1179/a4/provided-files/q3/rotate.cc:15: undefined reference to `PPM::getHeight()'
/u5/rriachi/cs246/1179/a4/provided-files/q3/rotate.cc:15: undefined reference to `PPM::getWidth()'
/u5/rriachi/cs246/1179/a4/provided-files/q3/rotate.cc:17: undefined reference to `PPM::getWidth()'
/u5/rriachi/cs246/1179/a4/provided-files/q3/rotate.cc:18: undefined reference to `PPM::getHeight()'
/u5/rriachi/cs246/1179/a4/provided-files/q3/rotate.cc:19: undefined reference to `PPM::getHeight()'
/u5/rriachi/cs246/1179/a4/provided-files/q3/rotate.cc:19: undefined reference to `PPM::getWidth()'
/u5/rriachi/cs246/1179/a4/provided-files/q3/rotate.cc:19: undefined reference to `PPM::getHeight()'
/u5/rriachi/cs246/1179/a4/provided-files/q3/rotate.cc:19: undefined reference to `PPM::getPixels()'
/u5/rriachi/cs246/1179/a4/provided-files/q3/rotate.cc:23: undefined reference to `PPM::getHeight()'
/u5/rriachi/cs246/1179/a4/provided-files/q3/rotate.cc:23: undefined reference to `PPM::getWidth()'
/u5/rriachi/cs246/1179/a4/provided-files/q3/rotate.cc:24: undefined reference to `PPM::getPixels()'
sepia.o: In function `sepia::render(PPM&)':
/u5/rriachi/cs246/1179/a4/provided-files/q3/sepia.cc:29: undefined reference to `PPM::getHeight()'
/u5/rriachi/cs246/1179/a4/provided-files/q3/sepia.cc:29: undefined reference to `PPM::getWidth()'
/u5/rriachi/cs246/1179/a4/provided-files/q3/sepia.cc:32: undefined reference to `PPM::getPixels()'
/u5/rriachi/cs246/1179/a4/provided-files/q3/sepia.cc:41: undefined reference to `PPM::getPixels()'
collect2: error: ld returned 1 exit status
Makefile:8: recipe for target 'a4q3' failed
make: *** [a4q3] Error 1