+(defcustom reftex-label-regexps
+ '(;; Normal \\label{foo} labels
+ "\\\\label{\\(?1:[^}]*\\)}"
+ ;; keyvals [..., label = {foo}, ...] forms used by ctable,
+ ;; listings, minted, ...
+ "\\[[^]]*\\<label[[:space:]]*=[[:space:]]*{?\\(?1:[^],}]+\\)}?")
+ "List of regexps matching \\label definitions.
+The default value matches usual \\label{...} definitions and
+keyval style [..., label = {...}, ...] label definitions. It is
+assumed that the regexp group 1 matches the label text, so you
+have to define it using \\(?1:...\\) when adding new regexps.
+
+When changed from Lisp, make sure to call
+`reftex-compile-variables' afterwards to make the change
+effective."
+ :version "24.4"
+ :set (lambda (symbol value)
+ (set symbol value)
+ (when (fboundp 'reftex-compile-variables)
+ (reftex-compile-variables)))
+ :group 'reftex-defining-label-environments
+ :type '(repeat (regexp :tag "Regular Expression")))
+
+(defcustom reftex-label-ignored-macros-and-environments nil
+ "List of macros and environments to be ignored when searching for labels.
+The purpose is to ignore environments and macros that use keyval
+style label=foo arguments, but the label has a different meaning
+than a \\label{foo}. Standard \\label{...} definitions are never
+ignored.
+
+E.g., TikZ defines several macros/environments where [label=foo]
+defines the label to be printed at some node or edge, but it's
+not a label used for referencing.
+
+Note that this feature is only supported if you are using AUCTeX
+and the functions `TeX-current-macro' and
+`LaTeX-current-environment' are bound. Also note that this
+feature might slow down the reftex parsing process for large TeX
+files."
+ :version "24.4"
+ :group 'reftex-defining-label-environments
+ :type '(repeat string))
+