SDL_image, IMG_Load error

SDL Development
1

When I first tried compliling a small program using SDL_image I used the
following line to compile and got the following error…

g++ fosdl8_1.cpp -o fosdl sdl-config --cflags --libs

/tmp/ccCum2vK.o(.text+0x8f): In function main': : undefined reference toIMG_Load’
collect2: ld returned 1 exit status

So then I went and tried the following compile line…

g++ fosdl8_1.cpp -o fosdl sdl-config --cflags --libs -lSDL_image

…and I received a list of errors containing things like…

/usr/lib/libSDL_image.a(IMG_jpg.o)(.text+0x40b): In function
IMG_LoadJPG_RW': : undefined reference tojpeg_destroy_decompress’
/usr/lib/libSDL_image.a(IMG_png.o)(.text+0x4a): In function IMG_isPNG': : undefined reference topng_sig_cmp’
/usr/lib/libSDL_image.a(IMG_png.o)(.text+0x6d): In function png_read_data': : undefined reference topng_get_io_ptr’
/usr/lib/libSDL_image.a(IMG_png.o)(.text+0xe7): In function IMG_LoadPNG_RW': : undefined reference topng_create_read_struct’
/usr/lib/libSDL_image.a(IMG_png.o)(.text+0xfa): In function IMG_LoadPNG_RW': : undefined reference topng_create_info_struct’

…all of the errors pertained to 'IMG_LoadJPG_RWandIMG_LoadPNG_RW`.
Anyone come across this before or have any ideas on how to fix this? The
latest version of SDL_image is installed.

thanks!

Art-

2

Arthur Dodd wrote

g++ fosdl8_1.cpp -o fosdl sdl-config --cflags --libs -lSDL_image

…and I received a list of errors containing things like…

/usr/lib/libSDL_image.a(IMG_jpg.o)(.text+0x40b): In function
IMG_LoadJPG_RW': : undefined reference tojpeg_destroy_decompress’
/usr/lib/libSDL_image.a(IMG_png.o)(.text+0x4a): In function IMG_isPNG': : undefined reference topng_sig_cmp’
/usr/lib/libSDL_image.a(IMG_png.o)(.text+0x6d): In function
png_read_data': : undefined reference topng_get_io_ptr’

which implies that it is not finding the jpeg and ping libs .
Cant remember whether DevIL takes care of the png and jpeg stuff
or whether you need the libpng and libjpeg stuff …
try -lIL (if you have devil installed (and I am fairly certain
that it is a requirement of sdl image)).
and if that doesnt do it add -lpng and -ljpeg .

Hope you fix it soon,

Steve Houseman–

currently : | for strace, an annotator see -
@steve_houseman | http://www.houseman.demon.co.uk/

3

Adding those two library flags fixed the problem. I knew I had those bad
boys installed :).

thanks!

Art-> Arthur Dodd wrote

> g++ fosdl8_1.cpp -o fosdl `sdl-config --cflags --libs` -lSDL_image > > ...and I received a list of errors containing things like... > > > /usr/lib/libSDL_image.a(IMG_jpg.o)(.text+0x40b): In function > `IMG_LoadJPG_RW': > : undefined reference to `jpeg_destroy_decompress' > /usr/lib/libSDL_image.a(IMG_png.o)(.text+0x4a): In function `IMG_isPNG': > : undefined reference to `png_sig_cmp' > /usr/lib/libSDL_image.a(IMG_png.o)(.text+0x6d): In function `png_read_data': > : undefined reference to `png_get_io_ptr'

which implies that it is not finding the jpeg and ping libs .
Cant remember whether DevIL takes care of the png and jpeg stuff
or whether you need the libpng and libjpeg stuff …
try -lIL (if you have devil installed (and I am fairly certain
that it is a requirement of sdl image)).
and if that doesnt do it add -lpng and -ljpeg .

Hope you fix it soon,

Steve Houseman

–

currently : | for strace, an annotator see -
steve at houseman demon co uk | http://www.houseman.demon.co.uk/

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