Building and Libraires Items

Question 1

What is C++ project

Answer 1

A C++ project refers to a collection of C++ source code files, libraries, and resources that work together to form a complete program or application. It involves multiple stages of processing, including compilation, assembly, linking, and execution.

Question 2

What does it mean to build a C++ project?

Answer 2

This process involves multiple steps and tools, preprocessingm compiler, assembler, and linker, which work together to process the source code, resolve dependencies, and produce the final executable.

Question 3

What does precompiler deal with?

Answer 3

precompiler directives.

Question 4

What does the #include precompiler directive do?

Answer 4

Goes through the code and processes #include by finding the source file and pastes it in the program

Question 5

What is the input of the precompiler?

Answer 5

C++ source code

Question 6

What is the output of the precompiler?

Answer 6

pure C++ code without any precompiler directives

Question 7

What does the compiler do?

Answer 7

Compiler compiles the high-level program into an assembly language program. Compiles each file into a seperate object file. Each object file corresponds to a specific CPP file. Each object file has 2 areas, text area and data area

Question 8

Does the compiler deal with header files directly?

Answer 8

No, header files become a part of .cpp files after a precompiler processes the project

Question 9

What is the output of the compiler?

Answer 9

object files that correspomg to specific CPP files.

Question 10

What is inside the object file?

Answer 10

CPU instructions, some initial data, symbol table

Question 11

Symbol table

Answer 11

a table that matches names of labels to the addresses of the memory words that instructions occupy

Question 12

Who needs symbol table

Answer 12

Linker

Question 13

Linker

Answer 13

combines multiple object files and library routines into an executable file. Has CPU instructions, initialized static and global data, symbol table.Allows programs to be compiled and assembled by procedures independently, so a change to one line would require compiling and assembling only one procedure

Question 14

Linker Produces

Answer 14

executable file that can be run on a computer.

Question 15

What is debug build?

Answer 15

compiler doesn’t care much about optimization. It’s larger in size and slow. Its focused more on catching errors in the program

Question 16

Release Build

Answer 16

ast and cares about optimization but not good at debugging code because it drastically changes it. Harder to catch mistakes in your program. Used when you know your program is working and now you care more about efficiency.

Question 17

What is library?

Answer 17

to package and link reusable code into your projects.

Question 18

Static linked library: fastest way to call library routines

Answer 18

Advantages

• No need to supply standard library separately

Disadvantages

• Library routines become part of the executable code. If a new version of the library is released that fixes bugs or supports new hardware devices, the statically linked program keeps using the old version, or the whole program needs to be updated
• It loads all routines in the library that are called anywhere in the executable, even if those calls are not executed.
• Makes the program longer

Question 19

Dynamically Linked Libraries

Answer 19

library routines are not linked and loaded until the program is run. Exists as a separate fileAdvantages

• Doesn’t require that whole libraries be copied or linked
• Doesn’t make the program larger
• Not touched unless they are required
• Programs share dynamic libraries

Disadvantages

• Require extra space for the information needed for dynamic linking
• Version control

Question 20

What are the two options to load dynamic libraries?

Answer 20

Implicit Linking
Explicit Linking