我正在尝试在 Snow Leopard 64 位下使用 netbeans 6.8 正确编译 c++ opengl+sdl 应用程序。
我使用 macports 安装了 libSDL 1.2.14。
我尝试编译的脚本如下：
#ifdef WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#endif
#if defined(__APPLE__) && defined(__MACH__)
#include <OpenGL/gl.h> // Header File For The OpenGL32 Library
#include <OpenGL/glu.h> // Header File For The GLu32 Library
#else
#include <GL/gl.h> // Header File For The OpenGL32 Library
#include <GL/glu.h> // Header File For The GLu32 Library
#endif
#include "sdl/SDL.h"
#include <stdio.h>
#include <unistd.h>
#include "SDL/SDL_main.h"
SDL_Surface *screen=NULL;
GLfloat rtri; // Angle For The Triangle ( NEW )
GLfloat rquad; // Angle For The Quad ( NEW )
void InitGL(int Width, int Height) // We call this right after our OpenGL window is created.
{
glViewport(0, 0, Width, Height);
glClearColor(0.0f, 0.0f, 0.0f, 0.0f); // This Will Clear The Background Color To Black
glClearDepth(1.0); // Enables Clearing Of The Depth Buffer
glDepthFunc(GL_LESS); // The Type Of Depth Test To Do
glEnable(GL_DEPTH_TEST); // Enables Depth Testing
glShadeModel(GL_SMOOTH); // Enables Smooth Color Shading
glMatrixMode(GL_PROJECTION);
glLoadIdentity(); // Reset The Projection Matrix
gluPerspective(45.0f,(GLfloat)Width/(GLfloat)Height,0.1f,100.0f); // Calculate The Aspect Ratio Of The Window
glMatrixMode(GL_MODELVIEW);
}
/* The main drawing function. */
int DrawGLScene()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear The Screen And The Depth Buffer
glLoadIdentity(); // Reset The View
glTranslatef(-1.5f,0.0f,-6.0f); // Move Left 1.5 Units And Into The Screen 6.0
glRotatef(rtri,0.0f,1.0f,0.0f); // Rotate The Triangle On The Y axis ( NEW )
// draw a triangle
glBegin(GL_TRIANGLES); // Begin Drawing Triangles
glColor3f(1.0f,0.0f,0.0f); // Red
glVertex3f( 0.0f, 1.0f, 0.0f); // Top Of Triangle (Front)
glColor3f(0.0f,1.0f,0.0f); // Green
glVertex3f(-1.0f,-1.0f, 1.0f); // Left Of Triangle (Front)
glColor3f(0.0f,0.0f,1.0f); // Blue
glVertex3f( 1.0f,-1.0f, 1.0f); // Right Of Triangle (Front)
glColor3f(1.0f,0.0f,0.0f); // Red
glVertex3f( 0.0f, 1.0f, 0.0f); // Top Of Triangle (Right)
glColor3f(0.0f,0.0f,1.0f); // Blue
glVertex3f( 1.0f,-1.0f, 1.0f); // Left Of Triangle (Right)
glColor3f(0.0f,1.0f,0.0f); // Green
glVertex3f( 1.0f,-1.0f, -1.0f); // Right Of Triangle (Right)
glColor3f(1.0f,0.0f,0.0f); // Red
glVertex3f( 0.0f, 1.0f, 0.0f); // Top Of Triangle (Back)
glColor3f(0.0f,1.0f,0.0f); // Green
glVertex3f( 1.0f,-1.0f, -1.0f); // Left Of Triangle (Back)
glColor3f(0.0f,0.0f,1.0f); // Blue
glVertex3f(-1.0f,-1.0f, -1.0f); // Right Of Triangle (Back)
glColor3f(1.0f,0.0f,0.0f); // Red
glVertex3f( 0.0f, 1.0f, 0.0f); // Top Of Triangle (Left)
glColor3f(0.0f,0.0f,1.0f); // Blue
glVertex3f(-1.0f,-1.0f,-1.0f); // Left Of Triangle (Left)
glColor3f(0.0f,1.0f,0.0f); // Green
glVertex3f(-1.0f,-1.0f, 1.0f); // Right Of Triangle (Left)
glEnd();
glLoadIdentity(); // Reset The Current Modelview Matrix
glTranslatef(1.5f,0.0f,-7.0f); // Move Right 1.5 Units And Into The Screen 6.0
glRotatef(rquad,1.0f,0.0f,0.0f); // Rotate The Quad On The X axis ( NEW )
glBegin(GL_QUADS); // Start Drawing Quads
glColor3f(0.0f,1.0f,0.0f); // Set The Color To Green
glVertex3f( 1.0f, 1.0f,-1.0f); // Top Right Of The Quad (Top)
glVertex3f(-1.0f, 1.0f,-1.0f); // Top Left Of The Quad (Top)
glVertex3f(-1.0f, 1.0f, 1.0f); // Bottom Left Of The Quad (Top)
glVertex3f( 1.0f, 1.0f, 1.0f); // Bottom Right Of The Quad (Top)
glColor3f(1.0f,0.5f,0.0f); // Set The Color To Orange
glVertex3f( 1.0f,-1.0f, 1.0f); // Top Right Of The Quad (Bottom)
glVertex3f(-1.0f,-1.0f, 1.0f); // Top Left Of The Quad (Bottom)
glVertex3f(-1.0f,-1.0f,-1.0f); // Bottom Left Of The Quad (Bottom)
glVertex3f( 1.0f,-1.0f,-1.0f); // Bottom Right Of The Quad (Bottom)
glColor3f(1.0f,0.0f,0.0f); // Set The Color To Red
glVertex3f( 1.0f, 1.0f, 1.0f); // Top Right Of The Quad (Front)
glVertex3f(-1.0f, 1.0f, 1.0f); // Top Left Of The Quad (Front)
glVertex3f(-1.0f,-1.0f, 1.0f); // Bottom Left Of The Quad (Front)
glVertex3f( 1.0f,-1.0f, 1.0f); // Bottom Right Of The Quad (Front)
glColor3f(1.0f,1.0f,0.0f); // Set The Color To Yellow
glVertex3f( 1.0f,-1.0f,-1.0f); // Bottom Left Of The Quad (Back)
glVertex3f(-1.0f,-1.0f,-1.0f); // Bottom Right Of The Quad (Back)
glVertex3f(-1.0f, 1.0f,-1.0f); // Top Right Of The Quad (Back)
glVertex3f( 1.0f, 1.0f,-1.0f); // Top Left Of The Quad (Back)
glColor3f(0.0f,0.0f,1.0f); // Set The Color To Blue
glVertex3f(-1.0f, 1.0f, 1.0f); // Top Right Of The Quad (Left)
glVertex3f(-1.0f, 1.0f,-1.0f); // Top Left Of The Quad (Left)
glVertex3f(-1.0f,-1.0f,-1.0f); // Bottom Left Of The Quad (Left)
glVertex3f(-1.0f,-1.0f, 1.0f); // Bottom Right Of The Quad (Left)
glColor3f(1.0f,0.0f,1.0f); // Set The Color To Violet
glVertex3f( 1.0f, 1.0f,-1.0f); // Top Right Of The Quad (Right)
glVertex3f( 1.0f, 1.0f, 1.0f); // Top Left Of The Quad (Right)
glVertex3f( 1.0f,-1.0f, 1.0f); // Bottom Left Of The Quad (Right)
glVertex3f( 1.0f,-1.0f,-1.0f); // Bottom Right Of The Quad (Right)
glEnd(); // Done Drawing A Quad
rtri+=0.02f; // Increase The Rotation Variable For The Triangle ( NEW )
rquad-=0.015f; // Decrease The Rotation Variable For The Quad ( NEW )
// swap buffers to display, since we're double buffered.
SDL_GL_SwapBuffers();
return true;
}
int main(int argc,char* argv[])
{
int done;
/*variable to hold the file name of the image to be loaded
*In real world error handling code would precede this
*/
/* Initialize SDL for video output */
if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {
fprintf(stderr, "Unable to initialize SDL: %s\n", SDL_GetError());
exit(1);
}
atexit(SDL_Quit);
/* Create a 640x480 OpenGL screen */
if ( SDL_SetVideoMode(640, 480, 0, SDL_OPENGL) == NULL ) {
fprintf(stderr, "Unable to create OpenGL screen: %s\n", SDL_GetError());
SDL_Quit();
exit(2);
}
SDL_WM_SetCaption("another example",NULL);
InitGL(640,480);
done=0;
while (! done) {
DrawGLScene();
SDL_Event event;
while ( SDL_PollEvent(&event) ) {
if ( event.type == SDL_QUIT ) {
done = 1;
}
if ( event.type == SDL_KEYDOWN ) {
if ( event.key.keysym.sym == SDLK_ESCAPE ) {
done = 1;
}
}
}
}
}
在 netbeans 项目属性下，我配置了以下内容：
C++ 编译器：添加/usr/X11/include到/opt/local/include包含目录。链接器：我添加了以下库：
/usr/X11/lib/libGL.dylib
/usr/X11/lib/libGLU.dylib
/opt/local/lib/libSDL.dylib
/opt/local/lib/libSDLmain.a
现在......在我将 SDL_main.h 和 libSDLMain.a 包含到项目中之前，我遇到了一个错误unknown reference to _main
然后我在这里读到：http ://www.libsdl.org/faq.php?action=listentries&category=7#55
我需要包含 SDL_Main.h 并将 libSDLMain.so 链接到我的项目。
这样做之后，该项目仍然无法编译。这是 Netbeans 输出：
/usr/bin/make -f nbproject/Makefile-Debug.mk SUBPROJECTS= .clean-conf
rm -f -r build/Debug
rm -f dist/Debug/GNU-MacOSX/opengl2
CLEAN SUCCESSFUL (total time: 79ms)
/usr/bin/make -f nbproject/Makefile-Debug.mk SUBPROJECTS= .build-conf
/usr/bin/make -f nbproject/Makefile-Debug.mk dist/Debug/GNU-MacOSX/opengl2
mkdir -p build/Debug/GNU-MacOSX
rm -f build/Debug/GNU-MacOSX/main.o.d
g++ -c -g -I/usr/X11/include -I/opt/local/include -MMD -MP -MF build/Debug/GNU-MacOSX/main.o.d -o build/Debug/GNU-MacOSX/main.o main.cpp
mkdir -p dist/Debug/GNU-MacOSX
g++ -o dist/Debug/GNU-MacOSX/opengl2 build/Debug/GNU-MacOSX/main.o /opt/local/lib/libIL.dylib /opt/local/lib/libILU.dylib /opt/local/lib/libILUT.dylib /usr/X11/lib/libGL.dylib /usr/X11/lib/libGLU.dylib /opt/local/lib/libSDL.dylib /opt/local/lib/libSDLmain.a
Undefined symbols:
"_OBJC_CLASS_$_NSMenu", referenced from:
__objc_classrefs__DATA@0 in libSDLmain.a(SDLMain.o)
"__objc_empty_cache", referenced from:
_OBJC_METACLASS_$_SDLMain in libSDLmain.a(SDLMain.o)
_OBJC_CLASS_$_SDLMain in libSDLmain.a(SDLMain.o)
"_CFBundleGetMainBundle", referenced from:
-[SDLMain setupWorkingDirectory:] in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
"_CFURLGetFileSystemRepresentation", referenced from:
-[SDLMain setupWorkingDirectory:] in libSDLmain.a(SDLMain.o)
"_NSApp", referenced from:
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
"_OBJC_CLASS_$_NSProcessInfo", referenced from:
__objc_classrefs__DATA@0 in libSDLmain.a(SDLMain.o)
"_CFURLCreateCopyDeletingLastPathComponent", referenced from:
-[SDLMain setupWorkingDirectory:] in libSDLmain.a(SDLMain.o)
"_NSAllocateMemoryPages", referenced from:
-[NSString(ReplaceSubString) stringByReplacingRange:with:] in libSDLmain.a(SDLMain.o)
"___CFConstantStringClassReference", referenced from:
cfstring=CFBundleName in libSDLmain.a(SDLMain.o)
cfstring= in libSDLmain.a(SDLMain.o)
cfstring=About in libSDLmain.a(SDLMain.o)
cfstring=Hide in libSDLmain.a(SDLMain.o)
cfstring=h in libSDLmain.a(SDLMain.o)
cfstring=Hide Others in libSDLmain.a(SDLMain.o)
cfstring=Show All in libSDLmain.a(SDLMain.o)
cfstring=Quit in libSDLmain.a(SDLMain.o)
cfstring=q in libSDLmain.a(SDLMain.o)
cfstring=Window in libSDLmain.a(SDLMain.o)
cfstring=m in libSDLmain.a(SDLMain.o)
cfstring=Minimize in libSDLmain.a(SDLMain.o)
"_OBJC_CLASS_$_NSAutoreleasePool", referenced from:
__objc_classrefs__DATA@0 in libSDLmain.a(SDLMain.o)
"_CPSEnableForegroundOperation", referenced from:
_main in libSDLmain.a(SDLMain.o)
"_CPSGetCurrentProcess", referenced from:
_main in libSDLmain.a(SDLMain.o)
"_CFBundleCopyBundleURL", referenced from:
-[SDLMain setupWorkingDirectory:] in libSDLmain.a(SDLMain.o)
"_NSDeallocateMemoryPages", referenced from:
-[NSString(ReplaceSubString) stringByReplacingRange:with:] in libSDLmain.a(SDLMain.o)
"_OBJC_CLASS_$_NSApplication", referenced from:
l_OBJC_$_CATEGORY_NSApplication_$_SDLApplication in libSDLmain.a(SDLMain.o)
__objc_classrefs__DATA@0 in libSDLmain.a(SDLMain.o)
"_CPSSetFrontProcess", referenced from:
_main in libSDLmain.a(SDLMain.o)
"_OBJC_CLASS_$_NSString", referenced from:
l_OBJC_$_CATEGORY_NSString_$_ReplaceSubString in libSDLmain.a(SDLMain.o)
__objc_classrefs__DATA@0 in libSDLmain.a(SDLMain.o)
"_OBJC_CLASS_$_NSObject", referenced from:
_OBJC_CLASS_$_SDLMain in libSDLmain.a(SDLMain.o)
"_CFBundleGetInfoDictionary", referenced from:
_main in libSDLmain.a(SDLMain.o)
"_CFRelease", referenced from:
-[SDLMain setupWorkingDirectory:] in libSDLmain.a(SDLMain.o)
-[SDLMain setupWorkingDirectory:] in libSDLmain.a(SDLMain.o)
"__objc_empty_vtable", referenced from:
_OBJC_METACLASS_$_SDLMain in libSDLmain.a(SDLMain.o)
_OBJC_CLASS_$_SDLMain in libSDLmain.a(SDLMain.o)
"_OBJC_CLASS_$_NSMenuItem", referenced from:
__objc_classrefs__DATA@0 in libSDLmain.a(SDLMain.o)
"_objc_msgSend", referenced from:
-[SDLMain application:openFile:] in libSDLmain.a(SDLMain.o)
-[SDLMain applicationDidFinishLaunching:] in libSDLmain.a(SDLMain.o)
-[NSString(ReplaceSubString) stringByReplacingRange:with:] in libSDLmain.a(SDLMain.o)
-[NSString(ReplaceSubString) stringByReplacingRange:with:] in libSDLmain.a(SDLMain.o)
-[NSString(ReplaceSubString) stringByReplacingRange:with:] in libSDLmain.a(SDLMain.o)
-[NSString(ReplaceSubString) stringByReplacingRange:with:] in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
_main in libSDLmain.a(SDLMain.o)
"_OBJC_METACLASS_$_NSObject", referenced from:
_OBJC_METACLASS_$_SDLMain in libSDLmain.a(SDLMain.o)
_OBJC_METACLASS_$_SDLMain in libSDLmain.a(SDLMain.o)
"_objc_msgSend_fixup", referenced from:
l_objc_msgSend_fixup_objectForKey_ in libSDLmain.a(SDLMain.o)
l_objc_msgSend_fixup_length in libSDLmain.a(SDLMain.o)
l_objc_msgSend_fixup_alloc in libSDLmain.a(SDLMain.o)
l_objc_msgSend_fixup_release in libSDLmain.a(SDLMain.o)
ld: symbol(s) not found
collect2: ld returned 1 exit status
make[2]: *** [dist/Debug/GNU-MacOSX/opengl2] Error 1
make[1]: *** [.build-conf] Error 2
make: *** [.build-impl] Error 2
BUILD FAILED (exit value 2, total time: 263ms)
有任何想法吗？
多谢！