In order to get performance information using gprof, copy the CImg folder containing all source files to matrix. CImg is built to be cross-platform library and should work as is. Some background information on what makes that is possible [http://cimg.eu/reference/group__cimg__overview.html can be found here]. [http://cimg.eu/reference/group__cimg__environment.html Environment variables] are automatically set based on OS, routing the program to appropriate paths of logic.

Update Rotate.cpp to use relative paths to the .jpg files using Unix forward slash:

From the extracted source folder ''jpeg-9c'', run the projects libjpeg configure script and specify the new folder you created with the following command:

The configure script sets the build path, checks system information, compiler settings, required files, and generates a new makefile.

Finally, run the following, which will put libjpeg.a into a 'lib' folder within the build folder we created: jpeg-build/lib/.

Now, build the Rotate Rotate90 source for profiling, linking libjpeg.a and X11 resources which are required for CImg Display functionality in a Unix environment. This prevents any errors during compilation, however, if we call the CImg display function, matrix will throw a run-time error of "Failed to open X11 display". I created the following makefile: