This is very strange or very simple. I am using Devil library and in the very simple program I have to initialize it by:
ilInit();
iluInit();
And here is the problem. IlInit() works fine, but iluInit() is not! It can not find the reference.
Of course I include headers:
#include <IL/il.h>
#include <IL/ilu.h>
And compile my file by:
g++ -std=gnu++11 -O3 myIL.cpp -lglfw3 -lGL -lGLEW -lIL -lGLU -lX11 -lXxf86vm -lpthread -lXrandr -lXi -o myIL
(generally I want to use Devil lib for OpenGL project but I don't think it is important right now).
I have also all headers in /usr/include/IL and *.a, *.so etc. files in /usr/lib/x86_64-linux-gnu.
Btw it also be great if someone could explain me what the difference between IlInit(), iluInit() and ilutInit(). I cannot find the simple explanation.
I don't know anything about devils, but I suspect you forgot to link against the relevant library -- wouldn't that be libILU.so, i.e. require the compiler/loader option -lILU?