Squashed 'cmake/' content from commit 2d25566

git-subtree-dir: cmake
git-subtree-split: 2d25566a1c5162ce3fd6bfc268d5665de182af89

ListFilter.cmake

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+# - List filtering functions
+#
+#  list_filter(var regex listitems...) - where var is the name of
+#   your desired output variable, regex is the regex whose matching items
+#   WILL be put in the output variable, and everything else is considered
+#   a list item to be filtered.
+#
+#  list_filter_out(var regex listitems...) - where var is the name of
+#   your desired output variable, regex is the regex whose matching items
+#   will NOT be put in the output variable, and everything else is considered
+#   a list item to be filtered.
+#
+# Original Author:
+# 2009-2010 Ryan Pavlik <rpavlik@iastate.edu> <abiryan@ryand.net>
+# http://academic.cleardefinition.com
+# Iowa State University HCI Graduate Program/VRAC
+#
+#          Copyright Iowa State University 2009-2010
+# Distributed under the Boost Software License, Version 1.0.
+#    (See accompanying file LICENSE_1_0.txt or copy at
+#          http://www.boost.org/LICENSE_1_0.txt)
+
+if(__list_filter_out)
+	return()
+endif()
+set(__list_filter_out YES)
+
+function(list_filter_out var regex)
+	set(_out)
+	foreach(_item ${ARGN})
+		set(_re)
+		string(REGEX MATCH "${regex}" _re "${_item}")
+		if(NOT _re)
+			list(APPEND _out "${_item}")
+		endif()
+	endforeach()
+	set(${var} "${_out}" PARENT_SCOPE)
+endfunction()
+
+function(list_filter var regex)
+	set(_out)
+	foreach(_item ${ARGN})
+		set(_re)
+		string(REGEX MATCH "${regex}" _re "${_item}")
+		if(_re)
+			list(APPEND _out "${_item}")
+		endif()
+	endforeach()
+	set(${var} "${_out}" PARENT_SCOPE)
+endfunction()