From c45400672ff7d5ab7df0a6dded2e35eb128b2f67 Mon Sep 17 00:00:00 2001 From: Glenn Morris Date: Thu, 29 Nov 2007 04:41:17 +0000 Subject: [PATCH] (Declaring Functions): Add findex. Mention `external' files. --- doc/lispref/functions.texi | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/doc/lispref/functions.texi b/doc/lispref/functions.texi index 182d26511b1..b6f209c16d2 100644 --- a/doc/lispref/functions.texi +++ b/doc/lispref/functions.texi @@ -1227,6 +1227,7 @@ following the definition, just like macros. @section Telling the Compiler that a Function is Defined @cindex function declaration @cindex declaring functions +@findex declare-function Byte-compiling a file often produces warnings about functions that the compiler doesn't know about (@pxref{Compiler Errors}). Sometimes this @@ -1289,6 +1290,11 @@ you call a function that is defined only on certain systems. Most of the primitive functions of Emacs are always defined so they will never give you a warning. + Sometimes a file will optionally use functions from an external package. +If you prefix the filename in the @code{declare-function} statement with +@samp{ext:}, then it will be checked if it is found, otherwise skipped +without error. + @node Function Safety @section Determining whether a Function is Safe to Call @cindex function safety -- 2.39.2