Shared libraries are a technique for placing library functions into a single unit that
can be shared by multiple processes at run time. This technique can save both disk space
and RAM. This chapter covers the fundamentals of shared libraries. The next chapter
covers a number of advanced features of shared libraries.
One way of building a program is simply to compile each of its source files to
produce corresponding object files, and then link all of these object files together
to produce the executable program, like so:
$ cc -g -c prog.c mod1.c mod2.c mod3.c
$ cc -g -o prog_nolib prog.o mod1.o mod2.o mod3.o
Linking is actually performed by the separate linker program,
ld. When we link ...
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