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Libtool

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Footnotes

(1)

If you don't specify an rpath, then libtool builds a libtool convenience archive, not a shared library (see section 3.7 Linking static libraries).

(2)

However, you should avoid using `-L' or `-l' flags to link against an uninstalled libtool library. Just specify the relative path to the `.la' file, such as `../intl/libintl.la'. This is a design decision to eliminate any ambiguity when linking against uninstalled shared libraries.

(3)

Don't accidentally strip the libraries, though, or they will be unusable.

(4)

AC_PROG_LIBTOOL requires that you define the `Makefile' variable top_builddir in your `Makefile.in'. Automake does this automatically, but Autoconf users should set it to the relative path to the top of your build directory (`../..', for example).

(5)

GNU Image Manipulation Program, for those who haven't taken the plunge. See http://www.gimp.org/.

(6)

We used to recommend __P, __BEGIN_DECLS and __END_DECLS. This was bad advice since symbols (even preprocessor macro names) that begin with an underscore are reserved for the use of the compiler.

(7)

HP-UX, to be different, uses a function named shl_load.

(8)

LIBPATH on AIX, and SHLIB_PATH on HP-UX.

(9)

This is used for the host dependent module loading API -- shl_load and LoadLibrary for example

(10)

Even if libltdl is installed, `AC_LIBLTDL_INSTALLABLE' may fail to detect it, if libltdl depends on symbols provided by libraries other than the C library. In this case, it will needlessly build and install libltdl.

(11)

All code compiled for the PowerPC and RS/6000 chips (powerpc-*-*, powerpcle-*-*, and rs6000-*-*) is position-independent, regardless of the operating system or compiler suite. So, "regular objects" can be used to build shared libraries on these systems and no special PIC compiler flags are required.

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  Copyright 2003   by The Free Software Foundation     Updated Jun 2003