求助: freebsd6.2 搭建 openGL 开发环境

Question

如题.

#cd /usr/ports/graphics/freeglut/
#make install clean
#cd /usr/ports/graphics/libglut/
#make install clean

分别去找了这两个源.
http://heanet.dl.sourceforge.net/sourceforge/freeglut/freeglut-2.4.0.tar.gz
http://heanet.dl.sourceforge.net/sourceforge/mesa3d/MesaDemos-6.4.2.tar.gz

2. #ls /usr/local/include/GL/
3. freeglut.h      freeglut_ext.h  freeglut_std.h  glut.h

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//库文件有了。

1. # gcc -lglut t.c -o t
2. t.c:1:21: GL/glut.h: No such file or directory
3. t.c: In function `display':
4. t.c:5: error: `GL_COLOR_BUFFER_BIT' undeclared (first use in this function)
5. t.c:5: error: (Each undeclared identifier is reported only once
6. t.c:5: error: for each function it appears in.)
7. t.c:10: error: `GL_POLYGON' undeclared (first use in this function)
8. t.c: In function `init':
9. t.c:26: error: `GL_PROJECTION' undeclared (first use in this function)
10. t.c: In function `main':
11. t.c:40: error: `GLUT_SINGLE' undeclared (first use in this function)
12. t.c:40: error: `GLUT_RGB' undeclared (first use in this function)

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编译出错

t.c 找的一段测试代码:

1. #include <GL/glut.h>
2. void display(void)
3. {
4. /* clear all pixels  */
5.         glClear (GL_COLOR_BUFFER_BIT);
6. /* draw white polygon (rectangle) with corners at
7. * (0.25, 0.25, 0.0) and (0.75, 0.75, 0.0)  
8. */
9.         glColor3f (1.0, 1.0, 1.0);
10.         glBegin(GL_POLYGON);
11.         glVertex3f (0.25, 0.25, 0.0);
12.         glVertex3f (0.75, 0.25, 0.0);
13.         glVertex3f (0.75, 0.75, 0.0);
14.         glVertex3f (0.25, 0.75, 0.0);
15.         glEnd();
16. /* don't wait!  
17. * start processing buffered OpenGL routines
18. */
19.         glFlush ();
20. }
21. void init (void)
22. {
23. /* select clearing color     */
24.         glClearColor (0.0, 0.0, 0.0, 0.0);
25. /* initialize viewing values  */
26.         glMatrixMode(GL_PROJECTION);
27.         glLoadIdentity();
28.         glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
29. }
30. /*
31. * Declare initial window size, position, and display mode
32. * (single buffer and RGBA).  Open window with "hello"
33. * in its title bar.  Call initialization routines.
34. * Register callback function to display graphics.
35. * Enter main loop and process events.
36. */
37. int main(int argc, char** argv)
38. {
39.         glutInit(&argc, argv);
40.         glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB);
41.         glutInitWindowSize (250, 250);
42.         glutInitWindowPosition (100, 100);
43.         glutCreateWindow ("hello");
44.         init ();
45.         glutDisplayFunc(display);
46.         glutMainLoop();
47.         return 0;   /* ANSI C requires main to return int. */
48. }

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这个是什么原因呢??

Answer 1

ln -s /usr/local/lib/libglut.so /usr/lib/libglut.so
ln -s /usr/local/include/GL    /usr/include/GL
后,错误如下

1. #gcc -lglut t.c  -o t
2. In file included from /usr/include/GL/glut.h:17,
3.                  from t.c:1:
4. /usr/include/GL/freeglut_std.h:114:19: GL/gl.h: No such file or directory
5. /usr/include/GL/freeglut_std.h:115:20: GL/glu.h: No such file or directory
6. In file included from /usr/include/GL/glut.h:17,
7.                  from t.c:1:
8. /usr/include/GL/freeglut_std.h:432: error: syntax error before "layer"
9. /usr/include/GL/freeglut_std.h:491: error: syntax error before "query"
10. /usr/include/GL/freeglut_std.h:492: error: syntax error before "query"
11. /usr/include/GL/freeglut_std.h:494: error: syntax error before "query"
12. /usr/include/GL/freeglut_std.h:509: error: syntax error before "size"
13. /usr/include/GL/freeglut_std.h:510: error: syntax error before "size"
14. /usr/include/GL/freeglut_std.h:511: error: syntax error before "radius"
15. /usr/include/GL/freeglut_std.h:512: error: syntax error before "radius"
16. /usr/include/GL/freeglut_std.h:513: error: syntax error before "base"
17. /usr/include/GL/freeglut_std.h:514: error: syntax error before "base"
18. /usr/include/GL/freeglut_std.h:516: error: syntax error before "innerRadius"
19. /usr/include/GL/freeglut_std.h:517: error: syntax error before "innerRadius"
20. /usr/include/GL/freeglut_std.h:530: error: syntax error before "size"
21. /usr/include/GL/freeglut_std.h:531: error: syntax error before "size"
22. /usr/include/GL/freeglut_std.h:539: error: syntax error before "query"
23. /usr/include/GL/freeglut_std.h:544: error: syntax error before "query"
24. /usr/include/GL/freeglut_std.h:553: error: syntax error before "GLfloat"
25. /usr/include/GL/freeglut_std.h:554: error: syntax error before "glutGetColor"
26. t.c: In function `display':
27. t.c:5: error: `GL_COLOR_BUFFER_BIT' undeclared (first use in this function)
28. t.c:5: error: (Each undeclared identifier is reported only once
29. t.c:5: error: for each function it appears in.)
30. t.c:10: error: `GL_POLYGON' undeclared (first use in this function)
31. t.c: In function `init':
32. t.c:26: error: `GL_PROJECTION' undeclared (first use in this function)

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