Notes for myself (in advance of UW Bothell BootUp sessions)

c++ compilation notes

/*
Say you have 2 files:
hello.cpp --> has main()
fib.cpp --> has no main()
You also have a header file for fib.cpp
fib.h --> contains method signature for fib.cpp
All files are in the same directory
*/

// fib.cpp must (?) have a header file declaring the method signature.
// hello.cpp must have an include statement:
#include <fib.h>

// to compile, do these in order:
// 1. Compile fib.cpp
g++ -c fib.cpp
output: fib.o (an object file, which is the compiled binary copy of fib.cpp)
// 2. compile hello.cpp
g++ -c hello.cpp -I .
// 3. package all compiled files into an executable
g++ -o my_program_name hello.o fib.o
// 4. run my_program_name
./my_program_name

// chain these calls in linux using && for a one-line step
g++ -c fib.cpp && g++ -c hello.cpp -I . && g++ -o hey hello.o fib.o && ./hey

Options used:
-c: compile and assemble, but do not link
-o: place output into named file (in this example, -o hey places executable copy of .o files into an executable named "hey")
-I: search the named directory for header files; searches named directory/ies before searching system standard directories