Compile

Single file ​

Most basic command for compiling:

g++ -o myapp main.cpp

Adding some options may help debugging for development:

g++ -o myapp -Wall -Wextra -Werror main.cpp

Example of a hello world program:

#include <iostream>
 
int main()
{
    std::cout << "Hello World!" << std::endl;
    return 0;
}

For more printing features, use the fmt library (add -lfmt to CFLAGS) and write the code like this:

#include <fmt/base.h>

int main() {
    fmt::print("Hello, world!\n");
    return 0;
}

Makefile ​

We have to teach Makefile how to compile .cpp files into .o files. This step is not needed in C, but needed in C++.

CC = g++
CFLAGS = -Wall -Wextra -Werror $(EXTRA_CFLAGS)
OBJ = main.o
TARGET = myapp

.PHONY: build clean

build: $(OBJ)
	$(CC) $(CFLAGS) -o $(TARGET) $(OBJ)

%.o: %.cpp
	$(CC) $(CFLAGS) -c $< -o $@

clean:
	rm -f $(TARGET) $(OBJ)

CMake ​

Learning CMake might be a good idea.