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-@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 ---------------------------------------------------------------------
-@c Environment variables affecting the preprocessor
-@c ---------------------------------------------------------------------
-
-@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.
-
-@vtable @env
-@item CPATH
-@itemx C_INCLUDE_PATH
-@itemx CPLUS_INCLUDE_PATH
-@itemx OBJC_INCLUDE_PATH
-@c Commented out until ObjC++ is part of GCC:
-@c @itemx OBJCPLUS_INCLUDE_PATH
-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 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}
-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
-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.
-
-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
-@c man begin ENVIRONMENT
-
-@item 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
-by the compiler.  System header files are ignored in the dependency
-output.
-
-The value of @env{DEPENDENCIES_OUTPUT} can be just a file name, in
-which case the Make rules are written to that file, guessing the target
-name from the source file name.  Or the value can have the form
-@samp{@var{file} @var{target}}, in which case the rules are written to
-file @var{file} using @var{target} as the target name.
-
-In other words, this environment variable is equivalent to combining
-the options @option{-MM} and @option{-MF}
-@ifset cppmanual
-(@pxref{Invocation}),
-@end ifset
-@ifclear cppmanual
-(@pxref{Preprocessor Options}),
-@end ifclear
-with an optional @option{-MT} switch too.
-
-@item SUNPRO_DEPENDENCIES
-@cindex dependencies for make as output
-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
-@end vtable