--- Portfile.orig	2010-01-31 01:18:56.000000000 +0100
+++ Portfile	2010-02-01 00:48:54.000000000 +0100
@@ -126,6 +126,10 @@
     }]
 }
 
+variant regexmatchextra description {boost.regex: enable access to extended capture information of submatches} {
+     patchfiles-append   patch-regex-match-extra.diff
+}
+
 variant icu description {Enable Unicode support in Boost.Regex through ICU} {
     depends_lib-append  port:icu
     build.args-append   -sICU_PATH=${prefix}