how to cross compile libsdl_image for 386 on x64?

donnied · 09-14-2008, 07:07 AM

I'm trying to run a program that uses libsdl_image and I get this error message:

Code:

error while loading shared libraries: libSDL_image-1.2.so.0: cannot open shared object file: No such file or directory

If I check with ldd I see that:

Code:

 libSDL-1.2.so.0 => /usr/lib32/libSDL-1.2.so.0 (0xf7ec2000)
        libSDL_image-1.2.so.0 => not found
        libSDL_ttf-2.0.so.0 => not found
        libSDL_mixer-1.2.so.0 => not found

and ls -l shows me that there is a link:

Code:

libSDL_image-1.2.so.0 -> libSDL_image-1.2.so.0.1.5

and file shows me:

Code:

/usr/lib/libSDL_image-1.2.so.0.1.5: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, stripped

So, I cross compile. I specify installation path as /usr/lib32/? and put links?

(I'm using Debian so there isn't a ia32-libs-sdl package as in Ubuntu; could I get the source for Ubuntu and compile for Debian? I did a dpkg install of the ubuntu package but removed it because it didn't do anything and was sub optimal.)

weibullguy · 09-14-2008, 11:00 AM

You could execute ldconfig to see if that takes care of the problem not finding the SDL libraries. Also, SDL installs the file sdl-config. This is used by other applications when they are built against SDL to get information that is passed to gcc. For example, on my x86_64 box, I have both 32-bit and 64-bit SDL installed and checking the --libs (there are other switches to pass to sdl-config)

Code:

103 files(230M bytes) - /home/weibullguy
weibullguy@aragorn for 0h55m $ USE_ARCH=64 sdl-config --libs
-L/usr/lib64 -Wl,-rpath,/usr/lib64 -lSDL -lpthread

103 files(230M bytes) - /home/weibullguy
weibullguy@aragorn for 0h55m $ USE_ARCH=32 sdl-config --libs
-L/usr/lib -Wl,-rpath,/usr/lib -lSDL -lpthread

Whichever ABI is installed first will be over written by the second ABI you install unless there is some way to differentiate between the two. Don't know how Ubuntu/Debian does it, but keep this in mind if you build from source. SDL isn't the only package that has these config files instead of using metadata (*.pc) files.

BTW, you executed file on the 64-bit library, not the 32-bit library.

Code:

/usr/lib/libSDL_image-1.2.so.0.1.5

Of course, the 32-bit libraries are supposed to be in lib, not lib32 IAW the FHS.

donnied · 09-14-2008, 08:57 PM

Quote:

Originally Posted by weibullguy

BTW, you executed file on the 64-bit library, not the 32-bit library.

Code:

/usr/lib/libSDL_image-1.2.so.0.1.5

Of course, the 32-bit libraries are supposed to be in lib, not lib32 IAW the FHS.

Yeah, that seems to be the problem. I don't have the 32 bit library. I tried to set up a cross compiling tool chain earlier but I was unsuccessful. I might look into a chroot to make the file.

Thank you.