I am trying to compile a simple shading program. It’s an example I took from lighthouse3d. However I am having some issues with compiling it.
The entire code is given at the bottom.
I am getting these errors:
C:\Users\Emmett\Downloads\glutglsl5_2.0\ogl3.cpp||In function 'void setShaders()':|
C:\Users\Emmett\Downloads\glutglsl5_2.0\ogl3.cpp|138|warning: deprecated conversion from string constant to 'char*'|
C:\Users\Emmett\Downloads\glutglsl5_2.0\ogl3.cpp|139|warning: deprecated conversion from string constant to 'char*'|
C:\Users\Emmett\Downloads\glutglsl5_2.0\ogl3.cpp|132|warning: unused variable 'fs2'|
obj\Debug\Downloads\glutglsl5_2.0\ogl3.o||In function `Z18printShaderInfoLogj':|
C:\Users\Emmett\Downloads\glutglsl5_2.0\ogl3.cpp|100|undefined reference to `_imp____glewGetShaderiv'|
C:\Users\Emmett\Downloads\glutglsl5_2.0\ogl3.cpp|105|undefined reference to `_imp____glewGetShaderInfoLog'|
obj\Debug\Downloads\glutglsl5_2.0\ogl3.o||In function `Z19printProgramInfoLogj':|
C:\Users\Emmett\Downloads\glutglsl5_2.0\ogl3.cpp|117|undefined reference to `_imp____glewGetProgramiv'|
C:\Users\Emmett\Downloads\glutglsl5_2.0\ogl3.cpp|122|undefined reference to `_imp____glewGetProgramInfoLog'|
obj\Debug\Downloads\glutglsl5_2.0\ogl3.o||In function `Z10setShadersv':|
C:\Users\Emmett\Downloads\glutglsl5_2.0\ogl3.cpp|134|undefined reference to `_imp____glewCreateShader'|
C:\Users\Emmett\Downloads\glutglsl5_2.0\ogl3.cpp|135|undefined reference to `_imp____glewCreateShader'|
C:\Users\Emmett\Downloads\glutglsl5_2.0\ogl3.cpp|136|undefined reference to `_imp____glewCreateShader'|
C:\Users\Emmett\Downloads\glutglsl5_2.0\ogl3.cpp|144|undefined reference to `_imp____glewShaderSource'|
C:\Users\Emmett\Downloads\glutglsl5_2.0\ogl3.cpp|145|undefined reference to `_imp____glewShaderSource'|
C:\Users\Emmett\Downloads\glutglsl5_2.0\ogl3.cpp|149|undefined reference to `_imp____glewCompileShader'|
C:\Users\Emmett\Downloads\glutglsl5_2.0\ogl3.cpp|150|undefined reference to `_imp____glewCompileShader'|
C:\Users\Emmett\Downloads\glutglsl5_2.0\ogl3.cpp|156|undefined reference to `_imp____glewCreateProgram'|
C:\Users\Emmett\Downloads\glutglsl5_2.0\ogl3.cpp|157|undefined reference to `_imp____glewAttachShader'|
C:\Users\Emmett\Downloads\glutglsl5_2.0\ogl3.cpp|158|undefined reference to `_imp____glewAttachShader'|
C:\Users\Emmett\Downloads\glutglsl5_2.0\ogl3.cpp|160|undefined reference to `_imp____glewLinkProgram'|
C:\Users\Emmett\Downloads\glutglsl5_2.0\ogl3.cpp|163|undefined reference to `_imp____glewUseProgram'|
||=== Build finished: 16 errors, 3 warnings ===|
I have linked to glew32.lib, libopengl.lib, glut32.lib, libglu32.a and glut.lib.
I have glew32.dll, glu32.dll, glut.dll, glut32.dll and opengl.dll in the windows/system32 directory.
So I am confused as to why these errors are being given. By the way, I’m using Code::blocks, with the GNU GCC compiler.
Any help with this would be greatly appreciated. Thank you.
/*
Simple Demo for GLSL
www.lighthouse3d.com
*/
#include <windows.h>
#include <stdio.h>
#include <math.h>
#include <vector.h>
#define GLUT_DISABLE_ATEXIT_HACK
#include "GL/glew.h"
#include "GL/glut.h"
#include "GL/gl.h"
#include "textfile.h"
GLuint v,f,f2,p;
float lpos[4] = {1,0.5,1,0};
void changeSize(int w, int h) {
// Prevent a divide by zero, when window is too short
// (you cant make a window of zero width).
if(h == 0)
h = 1;
float ratio = 1.0* w / h;
// Reset the coordinate system before modifying
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
// Set the viewport to be the entire window
glViewport(0, 0, w, h);
// Set the correct perspective.
gluPerspective(45,ratio,1,1000);
glMatrixMode(GL_MODELVIEW);
}
float a = 0;
void renderScene(void) {
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
gluLookAt(0.0,0.0,5.0,
0.0,0.0,-1.0,
0.0f,1.0f,0.0f);
glLightfv(GL_LIGHT0, GL_POSITION, lpos);
glRotatef(a,0,1,1);
glutSolidTeapot(1);
a+=0.1;
glutSwapBuffers();
}
void processNormalKeys(unsigned char key, int x, int y) {
if (key == 27)
exit(0);
}
#define printOpenGLError() printOglError(__FILE__, __LINE__)
int printOglError(char *file, int line)
{
//
// Returns 1 if an OpenGL error occurred, 0 otherwise.
//
GLenum glErr;
int retCode = 0;
glErr = glGetError();
while (glErr != GL_NO_ERROR)
{
printf("glError in file %s @ line %d: %s
", file, line, gluErrorString(glErr));
retCode = 1;
glErr = glGetError();
}
return retCode;
}
void printShaderInfoLog(GLuint obj)
{
int infologLength = 0;
int charsWritten = 0;
char *infoLog;
glGetShaderiv(obj, GL_INFO_LOG_LENGTH,&infologLength);
if (infologLength > 0)
{
infoLog = (char *)malloc(infologLength);
glGetShaderInfoLog(obj, infologLength, &charsWritten, infoLog);
printf("%s
",infoLog);
free(infoLog);
}
}
void printProgramInfoLog(GLuint obj)
{
int infologLength = 0;
int charsWritten = 0;
char *infoLog;
glGetProgramiv(obj, GL_INFO_LOG_LENGTH,&infologLength);
if (infologLength > 0)
{
infoLog = (char *)malloc(infologLength);
glGetProgramInfoLog(obj, infologLength, &charsWritten, infoLog);
printf("%s
",infoLog);
free(infoLog);
}
}
void setShaders() {
char *vs = NULL,*fs = NULL,*fs2 = NULL;
v = glCreateShader(GL_VERTEX_SHADER);
f = glCreateShader(GL_FRAGMENT_SHADER);
f2 = glCreateShader(GL_FRAGMENT_SHADER);
vs = textFileRead("minimal.vert");
fs = textFileRead("minimal.frag");
const char * vv = vs;
const char * ff = fs;
glShaderSource(v, 1, &vv,NULL);
glShaderSource(f, 1, &ff,NULL);
free(vs);free(fs);
glCompileShader(v);
glCompileShader(f);
printShaderInfoLog(v);
printShaderInfoLog(f);
printShaderInfoLog(f2);
p = glCreateProgram();
glAttachShader(p,v);
glAttachShader(p,f);
glLinkProgram(p);
printProgramInfoLog(p);
glUseProgram(p);
}
int main(int argc, char **argv) {
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGBA);
glutInitWindowPosition(100,100);
glutInitWindowSize(320,320);
glutCreateWindow("MM 2004-05");
glutDisplayFunc(renderScene);
glutIdleFunc(renderScene);
glutReshapeFunc(changeSize);
glutKeyboardFunc(processNormalKeys);
glEnable(GL_DEPTH_TEST);
glClearColor(1.0,1.0,1.0,1.0);
glEnable(GL_CULL_FACE);
glewInit();
if (glewIsSupported("GL_VERSION_2_0"))
printf("Ready for OpenGL 2.0
");
else {
printf("OpenGL 2.0 not supported
");
exit(1);
}
setShaders();
glutMainLoop();
return 0;
}