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8.3.2 Building Libtool Libraries
Automake uses libtool to build libraries declared with the
LTLIBRARIES
primary. Each _LTLIBRARIES
variable is a
list of libtool libraries to build. For instance, to create a libtool
library named ‘libgettext.la’, and install it in libdir
,
write:
lib_LTLIBRARIES = libgettext.la libgettext_la_SOURCES = gettext.c gettext.h …
Automake predefines the variable pkglibdir
, so you can use
pkglib_LTLIBRARIES
to install libraries in
‘$(libdir)/@PACKAGE@/’.
If ‘gettext.h’ is a public header file that needs to be installed
in order for people to use the library, it should be declared using a
_HEADERS
variable, not in libgettext_la_SOURCES
.
Headers listed in the latter should be internal headers that are not
part of the public interface.
lib_LTLIBRARIES = libgettext.la libgettext_la_SOURCES = gettext.c … include_HEADERS = gettext.h …
A package can build and install such a library along with other
programs that use it. This dependency should be specified using
LDADD
. The following example builds a program named
‘hello’ that is linked with ‘libgettext.la’.
lib_LTLIBRARIES = libgettext.la libgettext_la_SOURCES = gettext.c … bin_PROGRAMS = hello hello_SOURCES = hello.c … hello_LDADD = libgettext.la
Whether ‘hello’ is statically or dynamically linked with ‘libgettext.la’ is not yet known: this will depend on the configuration of libtool and the capabilities of the host.
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