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10.1 Emacs Lisp

Automake provides some support for Emacs Lisp. The LISP primary is used to hold a list of ‘.el’ files. Possible prefixes for this primary are lisp_ and noinst_. Note that if lisp_LISP is defined, then ‘configure.ac’ must run AM_PATH_LISPDIR (see section Autoconf macros supplied with Automake).

Lisp sources are not distributed by default. You can prefix the LISP primary with dist_, as in dist_lisp_LISP or dist_noinst_LISP, to indicate that these files should be distributed.

Automake will byte-compile all Emacs Lisp source files using the Emacs found by AM_PATH_LISPDIR, if any was found. When performing such byte-compilation, the flags specified in the (developer-reserved) AM_ELCFLAGS and (user-reserved) ELCFLAGS make variables will be passed to the Emacs invocation.

Byte-compiled Emacs Lisp files are not portable among all versions of Emacs, so it makes sense to turn this off if you expect sites to have more than one version of Emacs installed. Furthermore, many packages don’t actually benefit from byte-compilation. Still, we recommend that you byte-compile your Emacs Lisp sources. It is probably better for sites with strange setups to cope for themselves than to make the installation less nice for everybody else.

There are two ways to avoid byte-compiling. Historically, we have recommended the following construct.

lisp_LISP = file1.el file2.el
ELCFILES =

ELCFILES is an internal Automake variable that normally lists all ‘.elc’ files that must be byte-compiled. Automake defines ELCFILES automatically from lisp_LISP. Emptying this variable explicitly prevents byte-compilation.

Since Automake 1.8, we now recommend using lisp_DATA instead:

lisp_DATA = file1.el file2.el

Note that these two constructs are not equivalent. _LISP will not install a file if Emacs is not installed, while _DATA will always install its files.


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