Compiling SFML on linux (ubuntu)

Question

In compiling a SFML app,

• I need to first create the cpp file with the SFML code and save file
• Then write the command: g++ -c main.cpp to compile and create the object file.
• Finally, to create SFML app, i need to write the command:
  g++ main.o -o sfml-app -lsfml-graphics -lsfml-window -lsfml-system

I was successfully able to compile and run my first app, but can't we shorten this process, I mean do I have to type out this every time I compile, and make application?

I have this question also about compiling c++ files in general. Every time I have to write g++ filename.cpp -o filename. How can I shorten this process? Thank you.

Answer 1

It is very common to use a Makefile on Linux. The Makefile is simpler if you name your main source file the same as you want your finished program to be called.

So if you rename your main.cpp file to sfml-app.cpp and then create a file called Makefile and copy this text into it:

# optional flags (if the compiler supports it)
CXXFLAGS += -std=c++11

# HIGHLY RECOMMENDED flags
CXXFLAGS += -Wall -Wextra -pedantic-errors

# required for SFML programs
LDLIBS := $(shell pkg-config sfml-all --libs)

# The rest will turn any source file ending in .cpp
# into a program of the same name

SOURCES := $(wildcard *.cpp)
PROGRAMS := $(patsubst %.cpp,%,$(SOURCES))

all: $(PROGRAMS)

clean:
    $(RM) $(PROGRAMS)

Type: make to build the programs and make clean to remove them.

Note: The indentation of the $(RM) $(PROGRAMS) command must be a TAB, not spaces.

If you want to compile another program in the same directory simply create another source file in the directory another-app.cpp and make will automatically turn it into a program.

This Makefile will turn any source file (ending in .cpp) into a program of the same name.

Note: When you want to build larger, multi-file programs you will need a different Makefile. If you are serious about programming then you should learn make.

Here you can learn all about make.

Answer 2

You can write a .sh script that executes the commands:

g++ -c main.cpp
g++ main.o -o sfml-app -lsfml-graphics -lsfml-window -lsfml-system