FreeGLUT Communication Issues on Linux

Question

I am running Linux Mint 14.1 64-bit

I installed the following libraries:

Mesa common-mode DEV, freeglut3-DEV, libglew-DEV

using the apt-get tool.

Here are my Main.h included in my file:

#include <cmath> #include <cstdlib> #include <iostream> #include <stdio.h> #include <GL/glew.h> #include <GL/glut.h> #include <time.h> 

I checked that the libraries are installed correctly, they seem to be located in / usr / lib / x86_64-linux-gnu and the headers in / usr / include / GL

I proceed to compile my Main.C file with the following flags:

 g++ -Wall -Wextra -Weffc++ -Winit-self -Wmissing-include-dirs -Wswitch-default -switch-enum -Wunused-parameter -Wstrict-overflow=5 -Wfloat-equal -Wshadow -Wc++0x-compat -Wconversion -Wsign-conversion -Wmissing-declarations -Wstrict-null-sentinel -Woverloaded-virtual -Wsign-promo -Werror -pedantic -Wcast-qual -fno-pretty-templates -fmessage-length=80 -fdiagnostics-show-option -g -std=c++0x -pipe -frepo -c Main.C -o Main.o 

Main.o is generated without any problems, then I try to create a binary file:

 g++ -I/usr/include -L/usr/lib/x86_64-linux-gnu -lGL -lglut -lGLU -lGLEW -lX11 -lm -lrt -lpng Main.o -o main 

And get the following errors:

 Main.o: In function `init()': /path/to/Main.C:12: undefined reference to `glClearColor' Main.o: In function `initGLUT(int, char**)': /path/to/Main.C: undefined reference to `glutInit' /path/to/Main.C:21: undefined reference to `glutInitDisplayMode' /path/to/Main.C:24: undefined reference to `glutInitWindowSize' /path/to/Main.C:25: undefined reference to `glutCreateWindow' /path/to/Main.C:28: undefined reference to `glutDisplayFunc' /path/to/Main.C:31: undefined reference to `glutKeyboardFunc' /path/to/Main.C:34: undefined reference to `glutMouseFunc' /path/to/Main.C:37: undefined reference to `glutReshapeFunc' /path/to/Main.C:40: undefined reference to `glutIdleFunc' Main.o: In function `printFPS()': /path/to/Main.C:96: undefined reference to `glutGet' Main.o: In function `reshape(int, int)': /path/to/Main.C:123: undefined reference to `glutPostRedisplay' Main.o: In function `getTime()': /path/to/Main.C:129: undefined reference to `glutGet' Main.o: In function `idle()': /path/to/Main.C:141: undefined reference to `glutPostRedisplay' Main.o: In function `display()': /path/to/Main.C:148: undefined reference to `glClearColor' /path/to/Main.C:149: undefined reference to `glClear' /path/to/Main.C:150: undefined reference to `glFlush' /path/to/Main.C:151: undefined reference to `glutSwapBuffers' Main.o: In function `main': /path/to/Main.C:164: undefined reference to `glutMainLoop' 

Compilation of the program and links to another Linux system. what can i lose?

Answer 1

You must pass the libraries last (after the object file)

 g++ -I/usr/include -L/usr/lib/x86_64-linux-gnu Main.o \ -lGL -lglut -lGLU -lGLEW -lX11 -lm -lrt -lpng -o main 

The reason for this is because the linker only binds characters that are currently undefined. If you pass libraries in front of object files, then no undefined characters will be bound, so compilation / linking will fail.

Answer 2

Libraries should appear after your object files:

 g++ -I/usr/include -L/usr/lib/x86_64-linux-gnu Main.o -lGL -lglut -lGLU -lGLEW -lX11 -lm -lrt -lpng -o main