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i'm currently trying to compile some code as 32bit on a 64bit Ubuntu 12.04 machine. If i compile the code with the normal make command it all works fine.

Now, in order to compile it as 32bit i added the -m32 option to the C- & CXXFLAGS. Works fine until i get some errors about missing librarys like -lGL, -lGLU, -lX11, -lXext, -lpng. Okay, the first lib (-lGL) I found in /usr/lib32/nvidia-304 which i added via the -L option. The other libs are all found in /usr/lib/i386-linux-gnu but adding that via -L does not solve a thing.

What am I missing here? Thanks in advance!

Here is the full gcc-command leading to the error

gcc myprog.o -m32 (...) -lX11 -lXext -lpng -lm -L/usr/lib/i386-linux-gnu -lGL -L/usr/lib32/nvidia-304 -lpthread -o myprog /usr/bin/ld: cannot find -lX11 /usr/bin/ld: cannot find -lXext /usr/bin/ld: cannot find -lpng

Another thing: In the /usr/lib32/nvidia-304 i found a libGL.so PLUS an libGL.la while in /usr/lib/i386-linux-gnu I only can find .so files.

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  • Just for clarification, there is a libpng.so in /usr/lib/i386-linux-gnu ? Commented Sep 30, 2013 at 13:53
  • Yes, ./usr/lib/i386-linux-gnu/libpng.so.3 exists. Commented Sep 30, 2013 at 14:08
  • Hm, seems like @lolando might be on the right track then. You need a libpng.so, which may be a symlink to libpng.so.3. Did you install the 32bit libs the official, Ubuntu-supported way? Commented Sep 30, 2013 at 14:11
  • Hi, creating symbolic links like libpng.so to libpng.so.3 truly worked. I dont have root access to the system so i dont know how it got installed. Commented Sep 30, 2013 at 14:31

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Not sure if it helps, but i had some time ago a similar problem where some symbolic links were missing under /usr/lib/i386-linux-gnu. Perhaps you are facing a similar issue?

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Hi, as mentioned in the post above the creation of symbolic links worked so far. Thanks!

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