compile-file-if-needed

Arguments: input-filename &rest allargs &key force-compile

Compiles (with compile-file) input-filename if

1. there is no compiled version of that file, or
2. the compiled version is older than input-filename, or
3. the force-compile keyword argument is specified true.

All arguments acceptable to compile-file can also be specified to this function. input-filename must be a string naming a file or a pathname object identifying a file.

compile-file-if-needed returns what compile-file returns if a compilation is actually done (that is, it returns three values). If no compilation is done, compile-file-if-needed returns the name of the compiled file as a single return value. To determine whether a compilation was in fact done, capture the returned values in a list (with, say, multiple-value-list) and see whether its length is 3 (compilation performed) or 1 (no compilation performed).

See compiling.htm for general information on compiling.

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This page was not revised from the 8.1 page.
Created 2010.1.21.