Library Files Not Found, even though they are listed in ldconfig

Question

This is a head scratcher.

Below is the output of ldconfig -p | grep libncur* :

libncursesw.so.5 (libc6,x86-64) => /usr/lib64/libncursesw.so.5
libncursesw.so (libc6,x86-64) => /usr/lib64/libncursesw.so
libncurses.so.5 (libc6,x86-64) => /usr/lib/libncurses.so.5
libncurses.so.5 (libc6,x86-64) => /usr/lib64/libncurses.so.5
libncurses.so.5 (libc6,x86-64) => /lib/libncurses.so.5
libncurses.so (libc6,x86-64) => /usr/lib64/libncurses.so

This is the error I get:

/cass/bin/m050ub02: error while loading shared libraries: libncurses.so.5: cannot open shared object file: No such file or directory

Clearly the libraries are listed in the ldconfig cache, but it can't seem to find them.

Solution 1

Try this:

strace -e open /cass/bin/m050ub02

this should tell you what the binary is trying to open. Also try

echo $LD_LIBRARY_PATH

and see if your libraries are in there. If not, try symlinking them somewhere on that path.

Solution 2

The problem has been solved. It turns out they were 64-bit libraries, I found a 32-bit, and everything works perfectly now.

Comments

[Stephen Kitt]

What do file /cass/bin/m050ub02 and ldd /cass/bin/m050ub02 output?

[Jeff Schaller]

is the calling process overriding LD_LIBRARY_PATH?

[user2948306]

"cannot open shared object file: No such file or directory" - you could run it under strace to show us the path(s) it is trying to open. Use strace -e open if there is too much output to find it.

[Gilles 'SO- stop being evil']

There's something wrong with your configuration. A program should not be looking for 32-bit libraries in /usr/lib64.