Shared library dependencies with distutils

Question

I\'m a newbie to distutils and I have a problem that really has me stuck. I am compiling a package that requires an extension, so I make the extension thus:

Answer 1

You can have the linker store paths to search in the output binary so LD_LIBRARY_PATH isn't necessary. Some examples:

# Will link fine but at run-time LD_LIBRARY_PATH would be required
gcc -o blah blah.o -lpcap -L/opt/csw/lib

# Without LD_LIBRARY_PATH=/opt/csw/lib it will fail to link, but
# it wouldn't be needed at run-time
gcc -o blah blah.o -lpcap -Wl,-R/opt/csw/lib

# LD_LIBRARY_PATH not needed at link or run-time
gcc -o blah blah.o -lpcap -Wl,-{L,R}/opt/csw/lib

# This makes it possible to use relative paths; run `readelf -d binary_name`
# and you'll see '$ORIGIN/../lib/' in RPATH.  This plus `-zorigin` make it look
# relative to the binary for libraries at run-time
gcc -o blah blah.o -lsomelib -L/whatever/path/floats/your/boat -Wl,-R'$ORIGIN/../lib/' -Wl,-zorigin

.. where:

• paths given with -L are used at link-time
• paths given with -R are used at run-time