Imported gcc-4.4.3

[msp430-gcc.git] / gcc / doc / cppenv.texi

diff --git a/gcc/doc/cppenv.texi b/gcc/doc/cppenv.texi
index d60f7eef84cdb21d9e0a57069cc2d170daa94f55..bb29cb2d1407d2f196cb55c94405d89c6ca39506 100644 (file)
--- a/gcc/doc/cppenv.texi
+++ b/gcc/doc/cppenv.texi
@@ -1,4 +1,4 @@
-@c Copyright (c) 1999, 2000, 2001, 2002
+@c Copyright (c) 1999, 2000, 2001, 2002, 2004

 @c Free Software Foundation, Inc.
 @c This is part of the CPP and GCC manuals.
 @c For copying conditions, see the file gcc.texi.
 @c Free Software Foundation, Inc.
 @c This is part of the CPP and GCC manuals.
 @c For copying conditions, see the file gcc.texi.


@@ -10,7 +10,7 @@
 @c If this file is included with the flag ``cppmanual'' set, it is
 @c formatted for inclusion in the CPP manual; otherwise the main GCC manual.
 
 @c If this file is included with the flag ``cppmanual'' set, it is
 @c formatted for inclusion in the CPP manual; otherwise the main GCC manual.
 

-@ftable @env
+@vtable @env

 @item CPATH
 @itemx C_INCLUDE_PATH
 @itemx CPLUS_INCLUDE_PATH
 @item CPATH
 @itemx C_INCLUDE_PATH
 @itemx CPLUS_INCLUDE_PATH


@@ -20,12 +20,12 @@
 Each variable's value is a list of directories separated by a special
 character, much like @env{PATH}, in which to look for header files.
 The special character, @code{PATH_SEPARATOR}, is target-dependent and
 Each variable's value is a list of directories separated by a special
 character, much like @env{PATH}, in which to look for header files.
 The special character, @code{PATH_SEPARATOR}, is target-dependent and

-determined at GCC build time.  For Windows-based targets it is a
+determined at GCC build time.  For Microsoft Windows-based targets it is a

 semicolon, and for almost all other targets it is a colon.
 
 @env{CPATH} specifies a list of directories to be searched as if
 specified with @option{-I}, but after any paths given with @option{-I}
 semicolon, and for almost all other targets it is a colon.
 
 @env{CPATH} specifies a list of directories to be searched as if
 specified with @option{-I}, but after any paths given with @option{-I}

-options on the command line.  The environment variable is used
+options on the command line.  This environment variable is used

 regardless of which language is being preprocessed.
 
 The remaining environment variables apply only when preprocessing the
 regardless of which language is being preprocessed.
 
 The remaining environment variables apply only when preprocessing the


@@ -33,12 +33,19 @@ particular language indicated.  Each specifies a list of directories
 to be searched as if specified with @option{-isystem}, but after any
 paths given with @option{-isystem} options on the command line.
 
 to be searched as if specified with @option{-isystem}, but after any
 paths given with @option{-isystem} options on the command line.
 

+In all these variables, an empty element instructs the compiler to
+search its current working directory.  Empty elements can appear at the
+beginning or end of a path.  For instance, if the value of
+@env{CPATH} is @code{:/special/include}, that has the same
+effect as @samp{@w{-I. -I/special/include}}.
+
+@c man end

 @ifset cppmanual
 See also @ref{Search Path}.
 @end ifset
 @ifset cppmanual
 See also @ref{Search Path}.
 @end ifset

+@c man begin ENVIRONMENT

 
 @item DEPENDENCIES_OUTPUT
 
 @item DEPENDENCIES_OUTPUT

-@anchor{DEPENDENCIES_OUTPUT}

 @cindex dependencies for make as output
 If this variable is set, its value specifies how to output
 dependencies for Make based on the non-system header files processed
 @cindex dependencies for make as output
 If this variable is set, its value specifies how to output
 dependencies for Make based on the non-system header files processed


@@ -63,15 +70,14 @@ with an optional @option{-MT} switch too.
 
 @item SUNPRO_DEPENDENCIES
 @cindex dependencies for make as output
 
 @item SUNPRO_DEPENDENCIES
 @cindex dependencies for make as output

-This variable is the same as the environment variable
-@env{DEPENDENCIES_OUTPUT} (@pxref{DEPENDENCIES_OUTPUT}), except that
-system header files are not ignored, so it implies @option{-M} rather
-than @option{-MM}.  However, the dependence on the main input file is
-omitted.
+This variable is the same as @env{DEPENDENCIES_OUTPUT} (see above),
+except that system header files are not ignored, so it implies
+@option{-M} rather than @option{-MM}.  However, the dependence on the
+main input file is omitted.

 @ifset cppmanual
 @xref{Invocation}.
 @end ifset
 @ifclear cppmanual
 @xref{Preprocessor Options}.
 @end ifclear
 @ifset cppmanual
 @xref{Invocation}.
 @end ifset
 @ifclear cppmanual
 @xref{Preprocessor Options}.
 @end ifclear

-@end ftable
+@end vtable