From 70b6aaed80b78e1b1e72e84d8efc6574ef506299 Mon Sep 17 00:00:00 2001
From: Neil Booth <neil@daikokuya.demon.co.uk>
Date: Sat, 23 Feb 2002 17:10:34 +0000
Subject: [PATCH] * doc/cpp.texi, doc/invoke.texi: Update documentation for
 -MM.

From-SVN: r49997
---
 gcc/ChangeLog       |  4 ++++
 gcc/doc/cpp.texi    | 12 ++++++++----
 gcc/doc/invoke.texi | 11 ++++++++---
 3 files changed, 20 insertions(+), 7 deletions(-)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 627202d5ccc..11ec5227be1 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2002-02-23  Neil Booth  <neil@daikokuya.demon.co.uk>
+
+	* doc/cpp.texi, doc/invoke.texi: Update documentation for -MM.
+
 2002-02-23  Kazu Hirata  <kazu@hxi.com>
 
 	* config/h8300/h8300.c (output_simode_bld): Handle H8/300 and
diff --git a/gcc/doc/cpp.texi b/gcc/doc/cpp.texi
index f22e855d993..1e8fd030c8f 100644
--- a/gcc/doc/cpp.texi
+++ b/gcc/doc/cpp.texi
@@ -3959,10 +3959,14 @@ The rule has no commands.
 Passing @option{-M} to the driver implies @option{-E}.
 
 @item -MM
-Like @option{-M}, but mention only the files included with @code{@w{#include
-"@var{file}"}} or with @option{-include} or @option{-imacros} command line
-options.  System header files included with @code{@w{#include <@var{file}>}}
-are omitted.
+Like @option{-M} but do not mention header files that are found in
+system header directories, nor header files that are included,
+directly or indirectly, from such a header.
+
+This implies that the choice of angle brackets or double quotes in an
+@samp{#include} directive does not in itself determine whether that
+header will appear in @option{-MM} dependency output.  This is a
+slight change in semantics from GCC versions 3.0 and earlier.
 
 @item -MF @var{file}
 @anchor{-MF}
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 1b91a10f5c0..fbc74f470ef 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -4045,9 +4045,14 @@ Passing @option{-M} to the driver implies @option{-E}.
 
 @item -MM
 @opindex MM
-Like @option{-M}, but mention only the files included with @samp{#include
-"@var{file}"}.  System header files included with @samp{#include
-<@var{file}>} are omitted.
+Like @option{-M} but do not mention header files that are found in
+system header directories, nor header files that are included,
+directly or indirectly, from such a header.
+
+This implies that the choice of angle brackets or double quotes in an
+@samp{#include} directive does not in itself determine whether that
+header will appear in @option{-MM} dependency output.  This is a
+slight change in semantics from GCC versions 3.0 and earlier.
 
 @item -MD
 @opindex MD