JPEG Libs

Jens Zurheide jens.zurheide at gmx.de
Fri Jan 24 21:39:18 UTC 2003


Hi Ian,

is it possible that you are using an incompatible jpeg lib. If the jpeg lib 
cannot be found the error message is different from your output. Your 
problem seems to be that the tutorial uses library functions of a jpeg lib 
that are not (yet or any more) implemented in the library that the linker 
picks up.

I don't know what the solution is, but it might be necessary to find an 
older/newer library or to look for the functions provided by your current 
jpeg lib and modify your tutorial accordingly.

Good luck,
Jens

Thursday 23 January 2003 21:11 Ian Porter
>Hi all
>
>I am going thought the tutorial for game programming on the web site.
>http://www.gametutorials.com/
>I have got a error with compiling the last of the tutorials which uses the
>jpeg library, the error is below.
>
>g++ -o BSP  Main.o Init.o Camera.o Quake3Bsp.o Image.o `sdl-config --libs`
>-L/usr/X11R6/lib -lGL -lGLU -lm -ljpeg
>Image.o: In function `DecodeJPG(jpeg_decompress_struct*, tImage*)':
>Image.o(.text+0x782): undefined reference to
>`jpeg_read_header(jpeg_decompress_struct*, int)'
>Image.o(.text+0x790): undefined reference to
>`jpeg_start_decompress(jpeg_decompress_struct*)'
>Image.o(.text+0x86d): undefined reference to
>`jpeg_read_scanlines(jpeg_decompress_struct*, unsigned char**, unsigned)'
>Image.o(.text+0x898): undefined reference to
>`jpeg_finish_decompress(jpeg_decompress_struct*)'
>Image.o: In function `LoadJPG(char const*)':
>Image.o(.text+0x903): undefined reference to
> `jpeg_std_error(jpeg_error_mgr*)' Image.o(.text+0x922): undefined
> reference to
>`jpeg_CreateDecompress(jpeg_decompress_struct*, int, unsigned)'
>Image.o(.text+0x93a): undefined reference to
>`jpeg_stdio_src(jpeg_decompress_struct*, _IO_FILE*)'
>Image.o(.text+0x977): undefined reference to
>`jpeg_destroy_decompress(jpeg_decompress_struct*)'
>collect2: ld returned 1 exit status
>make: *** [BSP] Error 1
>
>This is the makefile
>CC			= g++
>
>TARGET		= BSP
>
>$(TARGET):	Main.o Init.o Camera.o Quake3Bsp.o Image.o
>	$(CC) -o $(TARGET) Main.o Init.o Camera.o Quake3Bsp.o Image.o `sdl-config
>--libs` -L/usr/X11R6/lib -lGL -lGLU -lm -ljpeg
>
>Main.o:		Main.cpp main.h Camera.h
>	$(CC) -c `sdl-config --cflags` Main.cpp
>
>Init.o:		Init.cpp main.h image.h
>	$(CC) -c `sdl-config --cflags` Init.cpp
>
>Camera.o :  Camera.cpp main.h Camera.h
>	$(CC) -c `sdl-config --cflags` Camera.cpp
>
>Quake3Bsp.o :  Quake3Bsp.cpp main.h Camera.h
>	$(CC) -c `sdl-config --cflags` Quake3Bsp.cpp
>
>Image.o :   Image.cpp image.h
>	$(CC) -c `sdl-config --cflags` Image.cpp
>
>clean:
>	rm -f $(TARGET) Main.o Init.o Camera.o Quake3Bsp.o Image.o core
>
>Any advice would be nice.  I have done a search on the web and some one
> says about having to recompile the jpeg sources with g++.  How would I do
> this ?
>
>Btw I am using Mandrake v9.0
>
>Cheers
>Ian
>
>
>
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