We now describe some technical details about the exact suffixes that
This is a list of suffixes indicating (compiled or source) Emacs Lisp files. It should not include the empty string.
load uses these suffixes in order when it appends Lisp suffixes to the specified file name. The standard value is
(".elc" ".el") which produces the behavior described in the previous section.
This is a list of suffixes that indicate representations of the same file. This list should normally start with the empty string. When
load searches for a file it appends the suffixes in this list, in order, to the file name, before searching for another file.
Enabling Auto Compression mode appends the suffixes in
jka-compr-load-suffixes to this list and disabling Auto Compression mode removes them again. The standard value of
load-file-rep-suffixes if Auto Compression mode is disabled is
(""). Given that the standard value of
(".gz"), the standard value of
load-file-rep-suffixes if Auto Compression mode is enabled is
This function returns the list of all suffixes that
load should try, in order, when its
must-suffix argument is non-
nil. This takes both
load-file-rep-suffixes into account. If
load-file-rep-suffixes all have their standard values, this function returns
(".elc" ".elc.gz" ".el" ".el.gz") if Auto Compression mode is enabled and
(".elc" ".el") if Auto Compression mode is disabled.
load normally first tries the suffixes in the value of
(get-load-suffixes) and then those in
nosuffix is non-
nil, it skips the former group, and if
must-suffix is non-
nil, it skips the latter group.
user option load-prefer-newer
If this option is non-
nil, then rather than stopping at the first suffix that exists,
load tests them all, and uses whichever file is the newest.