Create wiki on 'C++'

[jeff1evesque]

We need to discuss the following about the gcc compiler:

• g++ treats everything as c++ even when the extensions suggest c code (unless told otherwise), and link c++ standard libraries automatically. gcc treats everything according to known extensions (unless told otherwise) and does not automatically link c++ standard libraries.
• using the -o flag to specify output file name:
  • g++ -o detector.exe detector.cpp pkg-config --cflags --libs opencv
• run executable
  • CMD shell: simply run detector
  • Bash (or Bourne) shell: simply run ./detector
• usage for pkg-config while compiling.
  • pkg-config --cflags opencv prints the list of arguments needed to allow the compiler to find the header files, and make necessary links to OpenCV
  • pkg-config --libs opencv prints the commands needed for linking
  • The following are equivalent:
  • g++ -o detector.exe detector.cpp``pkg-config --cflags --libs opencv
  • g++ -o detector.exe detector.cpp $(pkg-config --cflags --libs opencv)

[jeff1evesque]

We need to add information regarding debugging tools:

• echo, shell print command
  • $?, special bash variable containing the exit code of the last run command