--- a/gcc/doc/cppopts.texi	Tue May 25 18:58:51 2010 +0900
+++ b/gcc/doc/cppopts.texi	Tue Mar 22 17:18:12 2011 +0900
@@ -188,8 +188,8 @@
 
 @item -M
 @opindex M
-@cindex make
-@cindex dependencies, make
+@cindex @command{make}
+@cindex dependencies, @command{make}
 Instead of outputting the result of preprocessing, output a rule
 suitable for @command{make} describing the dependencies of the main
 source file.  The preprocessor outputs one @command{make} rule containing
@@ -330,10 +330,10 @@
 @opindex fpch-preprocess
 This option allows use of a precompiled header (@pxref{Precompiled
 Headers}) together with @option{-E}.  It inserts a special @code{#pragma},
-@code{#pragma GCC pch_preprocess "<filename>"} in the output to mark
-the place where the precompiled header was found, and its filename.  When
-@option{-fpreprocessed} is in use, GCC recognizes this @code{#pragma} and
-loads the PCH@.
+@code{#pragma GCC pch_preprocess "@var{filename}"} in the output to mark
+the place where the precompiled header was found, and its @var{filename}.
+When @option{-fpreprocessed} is in use, GCC recognizes this @code{#pragma}
+and loads the PCH@.
 
 This option is off by default, because the resulting preprocessed output
 is only really suitable as input to GCC@.  It is switched on by
@@ -492,7 +492,9 @@
 @item -isysroot @var{dir}
 @opindex isysroot
 This option is like the @option{--sysroot} option, but applies only to
-header files.  See the @option{--sysroot} option for more information.
+header files (except for Darwin targets, where it applies to both header
+files and libraries).  See the @option{--sysroot} option for more
+information.
 
 @item -imultilib @var{dir}
 @opindex imultilib