From-SVN: r279813

From-SVN: r267494

From-SVN: r256169

	* incpath.c (add_sysroot_to_chain): Allow for $SYSROOT prefix.
	* doc/cppdiropts.texi (-I @var{dir}): Document it.

From-SVN: r249560

2017-01-07  Sandra Loosemore  <sandra@codesourcery.com>

	gcc/
	* doc/cppdiropts.texi: Merge documentation of -I, -iquote,
	-isystem, and -idirafter.  Copy-edit.
	* doc/cppopts.texi: Copy-edit.  Remove contradiction about 
	default for -ftrack-macro-expansion.  Delete obsolete and 
	badly-formatted implementation details about -fdebug-cpp output.
	* doc/cppwarnopts.texi: Copy-edit.

From-SVN: r244200

From-SVN: r243994

2016-12-27  Sandra Loosemore  <sandra@codesourcery.com>

	gcc/
	* doc/cppdiropts.texi, doc/cppwarnopts.texi:  New files, split from...
	* doc/cppopts.texi: .... here.
	* doc/cpp.texi (Invocation): Adjust includes.
	* doc/invoke.texi (Option Summary): Add missing preprocesor-related
	options.  Adjust sorting and formatting.
	(Warning Options): Include cppwarnopts.texi.
	(Preprocessor Options): Add pointers and list the specific 
	preprocessor options from cppopts.texi first instead of last.
	(Directory Options): Move/merge documentation of -I, -iquote, and
	-I- to cppdiropts.texi.  Include that file here.

From-SVN: r243954