在 -lftgl 之后尝试移动 -lopengl32 -lglu32 。让我们知道会发生什么。

请查看此问题以获取有关您的问题以及以后如何解决的更多详细信息：

为什么链接库的顺序有时会导致GCC错误？

I was trying to use this library to output text on a OpenGL application so far I got a prcompiled library so it would be easier to me to get started so this the code:

#include <SDL/SDL_opengl.h>
#include <FTGL/ftgl.h>
...
...
int main( int argc, char* args[] )
{
...
...

//Y U NO WORK!
FTGLPixmapFont font("ariblk.ttf");
if(font.Error())

...
...

 SDL_Quit();

 return 0;
 }

So if I do compile it with this linkers:
-lmingw32 -lSDLmain -lSDL -lopengl32 -lglu32 -lSDL_image -lm -lgdi32 -lsdl_mixer -lSDL_ttf

I get this errors:

OPENGL ETC\SDLOPENGL\main.cpp|108|undefined reference to `FTPixmapFont::FTPixmapFont(char const*)'|

OPENGL ETC\SDLOPENGL\main.cpp|109|undefined reference to `FTFont::Error() const'|

OPENGL ETC\SDLOPENGL\main.cpp|303|undefined reference to `FTPixmapFont::~FTPixmapFont()'|

OPENGL ETC\SDLOPENGL\main.cpp|303|undefined reference to `FTPixmapFont::~FTPixmapFont()'|
||=== Build finished: 4 errors, 0 warnings ===|

Now this should be cause I forgot to put linkers right IDK cause if I include the 2 remaining linkers:

-lfreetype2 -lftgl

I get like 50 of errors Im not going to put them here I dont want to broke your eyes guys.

So what could be the problem what can I do for fixing this?

IDE: CodeBlocks OS: Windows

EDIT:

So after changing order I still get errors

Errors:

||=== SDL, Debug ===|
int)]+0x12)||undefined reference to `glPushAttrib@4'|
int)]+0x21)||undefined reference to `glPushClientAttrib@4'|
int)]+0x30)||undefined reference to `glEnable@4'|
int)]+0x47)||undefined reference to `glBlendFunc@8'|
int)]+0x6c)||undefined reference to `glGetFloatv@8'|
int)]+0x82)||undefined reference to `glPixelTransferf@8'|
int)]+0x98)||undefined reference to `glPixelTransferf@8'|
int)]+0xae)||undefined reference to `glPixelTransferf@8'|
int)]+0xc4)||undefined reference to `glPixelTransferf@8'|
int)]+0x147)||undefined reference to `glPopClientAttrib@0'|
int)]+0x14c)||undefined reference to `glPopAttrib@0'|
int)]+0x12)||undefined reference to `glPushAttrib@4'|
int)]+0x21)||undefined reference to `glPushClientAttrib@4'|
int)]+0x30)||undefined reference to `glEnable@4'|
int)]+0x47)||undefined reference to `glBlendFunc@8'|
int)]+0x6c)||undefined reference to `glGetFloatv@8'|
int)]+0x82)||undefined reference to `glPixelTransferf@8'|
int)]+0x98)||undefined reference to `glPixelTransferf@8'|
int)]+0xae)||undefined reference to `glPixelTransferf@8'|
int)]+0xc4)||undefined reference to `glPixelTransferf@8'|
int)]+0x147)||undefined reference to `glPopClientAttrib@0'|
int)]+0x14c)||undefined reference to `glPopAttrib@0'|

c:\program     
files\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libftgl.a
(FTPixmapGlyph.o):FTPixmapGlyph.cpp|| undefined reference to `glBitmap@28'|

c:\program   files\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libftgl.a
(FTPixmapGlyph.o):FTPixmapGlyph.cpp|| undefined reference to `glPixelStorei@8'|

c:\program   files\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libftgl.a
(FTPixmapGlyph.o):FTPixmapGlyph.cpp|| undefined reference to `glPixelStorei@8'|

c:\program  files\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libftgl.a
(FTPixmapGlyph.o):FTPixmapGlyph.cpp|| undefined reference to `glDrawPixels@20'|

c:\program  files\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libftgl.a
(FTPixmapGlyph.o):FTPixmapGlyph.cpp|| undefined reference to `glBitmap@28'|
||=== Build finished: 27 errors, 0 warnings ===|

EDIT:

Seems like it will not work thx guys for your answers now after doing what casualcoder said errors still

||=== SDL, Debug ===|
c:\program    
files\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libftgl.a
(FTPixmapGlyph.o):FTPixmapGlyph.cpp|| undefined reference to `FT_Render_Glyph'|

c:\program files\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libftgl.a
(FTPixmapGlyph.o):FTPixmapGlyph.cpp|| undefined reference to `FT_Render_Glyph'|

c:\program       
files\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libftgl.a
(FTFace.o):FTFace.cpp|| undefined reference to `FT_New_Face'|

c:\program   files\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libftgl.a
(FTFace.o):FTFace.cpp|| undefined reference to `FT_New_Face'|

c:\program    files\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libftgl.a
(FTFace.o):FTFace.cpp|| undefined reference to `FT_New_Memory_Face'|

c:\program files\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libftgl.a
(FTFace.o):FTFace.cpp|| undefined reference to `FT_New_Memory_Face'|

c:\program files\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libftgl.a
(FTFace.o):FTFace.cpp|| undefined reference to `FT_Done_Face'|

c:\program files\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libftgl.a
(FTFace.o):FTFace.cpp|| undefined reference to `FT_Done_Face'|

c:\program files\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libftgl.a
(FTFace.o):FTFace.cpp|| undefined reference to `FT_Done_Face'|

c:\program files\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libftgl.a
(FTFace.o):FTFace.cpp|| undefined reference to `FT_Attach_File'|

c:\program files\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libftgl.a
(FTFace.o):FTFace.cpp|| undefined reference to `FT_Attach_Stream'|

c:\program files\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libftgl.a
(FTFace.o):FTFace.cpp|| undefined reference to `FT_Get_Kerning'|

c:\program files\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libftgl.a
(FTFace.o):FTFace.cpp|| undefined reference to `FT_Load_Glyph'|

c:\program files\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libftgl.a      
(FTFace.o):FTFace.cpp|| undefined reference to `FT_Get_Kerning'|

c:\program files\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libftgl.a   
(FTSize.o):FTSize.cpp|| undefined reference to `FT_Set_Char_Size'|
)]+0x54)||undefined reference to `FT_Outline_Get_CBox'|

c:\program files\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libftgl.a
(FTCharmap.o):FTCharmap.cpp|| undefined reference to `FT_Set_Charmap'|

c:\program files\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libftgl.a
(FTCharmap.o):FTCharmap.cpp|| undefined reference to `FT_Get_Char_Index'|

c:\program files\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libftgl.a
(FTCharmap.o):FTCharmap.cpp|| undefined reference to `FT_Set_Charmap'|

c:\program files\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libftgl.a
(FTCharmap.o):FTCharmap.cpp|| undefined reference to `FT_Get_Char_Index'|

c:\program files\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libftgl.a
(FTCharmap.o):FTCharmap.cpp|| undefined reference to `FT_Select_Charmap'|

c:\program files\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libftgl.a
(FTCharmap.o):FTCharmap.cpp|| undefined reference to `FT_Get_Char_Index'|

c:\program files\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libftgl.a
(FTLibrary.o):FTLibrary.cpp|| undefined reference to `FT_Done_FreeType'|

c:\program files\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libftgl.a
(FTLibrary.o):FTLibrary.cpp|| undefined reference to `FT_Done_FreeType'|

c:\program files\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libftgl.a
(FTLibrary.o):FTLibrary.cpp|| undefined reference to `FT_Init_FreeType'|
||=== Build finished: 25 errors, 0 warnings ===|

LAST UPDATE

The right order was:

-lmingw32 -lSDLmain -lSDL -lSDL_image -lm -lgdi32 -lsdl_mixer -lSDL_ttf -lftgl -lfreetype2 -lopengl32 -lglu32

Try moving -lopengl32 -lglu32 after -lftgl. Let us know what happens.

Look at this question for more details on your problem and how to solve it in future:

Why does the order in which libraries are linked sometimes cause errors in GCC?