Further Sources of Information

Manual pages: ar(1), gcc(1), ld(1), ldd(1), ldconfig(8), ld.so(8), dlopen(3), readelf(1), objdump(1).
Sun's Linker and Libraries Guide (available at http://docs.sun.com/).
HOWTO docs (at http://tldp.org/): David Wheeler's Program Library HOWTO, and Aaron Isotton's C++ dlopen mini HOWTO.
Ulrich Drepper, How to Write Shared Libraries (http://people.redhat.com/drepper/dsohowto.pdf).
Complete details on ELF can be found in the Executable and Linking Format (ftp://tsx-11.mit.edu/pub/linux/packages/GCC/ELF.doc.tar.gz), from the Tools Interface Standards committee.
Hongjiu Lu's 1995 article ELF: From the Programmer's Perspective (ftp://tsx-11.mit.edu/pub/linux/packages/GCC/elf.ps.gz).
Information on GNU libtool, a tool which shields the programmer from the implementation-specific details of building shared libraries, can be found at http://www.gnu.org/software/libtool.