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10.2 The Libtool Library
A Libtool library is built from Libtool objects in the same way
that a native (non-Libtool) library is built from native objects.
Building a Libtool library with libtool is as easy as building
an old style static archive. Generally, each of the sources is compiled
to a Libtool object, and then these objects are combined to create
the library.
If you want to try this to see what libtool does on your
machine, put the following code in a file `hello.c', in a directory
of its own, and run the example shell commands from there:
| #include <stdio.h>
void
hello (char *who)
{
printf ("Hello, %s!\n", who);
}
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The traditional way to make a (native) static library is as follows:
|
$ gcc -c hello.c
$ ls
hello.c hello.o
$ ar cru libhello.a hello.o
$ ranlib libhello.a
$ ls
hello.c hello.o libhello.a
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Notice that even when I just want to build an old static archive, I need
to know that, in common with most Unices, I have to
bless(14) my library with ranlib to make it work optimally on
HP-UX.
Essentially, Libtool supports the building of three types of library:
shared libraries; static libraries; and convenience libraries. In the
following sections I will talk about each in turn, but first you will
need to understand how to create and use position independent
code, as explained in the next section.
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