How to list exported functions in a shared lib on Ubuntu

Question

I have just built a shared lib on Ubuntu, and when I attempt to use the function, the application that loads the library is reporting \'xxx\' symbol not found.

I wan

Answer 1

nm -D -C -g <library>

works well too.

Answer 2

Try the nm utility.

GNU nm lists the symbols from object files objfile.... If no object files are listed as arguments, nm assumes the file a.out. [reference]

Answer 3

Is your shared library in the library load path or in the application's run-time search path? It sounds like the dynamic linker can't find your library. Try running ldd on your application to see if the library can be found at run-time, e.g.:

$ ldd /usr/bin/less
    linux-gate.so.1 =>  (0x0072a000)
    libncurses.so.5 => /lib/libncurses.so.5 (0x00c68000)
    libc.so.6 => /lib/tls/i686/cmov/libc.so.6 (0x007c7000)
    libdl.so.2 => /lib/tls/i686/cmov/libdl.so.2 (0x00286000)
    /lib/ld-linux.so.2 (0x002a1000)

See the ld.so(8) man page for additional details on library search paths.