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| -rw-r--r-- | doc/lispref/functions.texi | 6 |
1 files changed, 6 insertions, 0 deletions
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 |