--- configure.ac.ori	2012-06-14 21:55:13.756603416 +0200
+++ configure.ac	2012-06-14 23:12:01.425399836 +0200
@@ -150,16 +150,23 @@
 
 # POSIX capabilities
 LIBCAP=""
-AC_CHECK_HEADERS([sys/capability.h], [
-	AC_CHECK_LIB(cap, cap_set_proc, [
-		LIBCAP="-lcap"
-		AC_DEFINE(HAVE_LIBCAP, 1,
-			  [Define to 1 if you have the `cap' library (-lcap).])
-	])
+AC_ARG_WITH(libcap,
+  AS_HELP_STRING([--with-libcap], [enable POSIX 1003.1e capabilities]),
+    with_libcap=$withval,
+    with_libcap=auto)
+AC_MSG_CHECKING([whether to enable POSIX 1003.1e capabilities])
+AC_MSG_RESULT($with_libcap)
+
+AS_IF([test "x$with_libcap" != "xno"], [
+  AC_CHECK_HEADERS([sys/capability.h])
+  AC_CHECK_LIB(cap, cap_set_proc, [
+    LIBCAP="-lcap"
+    AC_DEFINE(HAVE_LIBCAP, 1,
+      [Define to 1 if you have the cap library (-lcap).])
+  ])
 ])
 AC_SUBST(LIBCAP)
 
-
 # Judy
 AC_ARG_WITH(Judy,
 	    [AS_HELP_STRING(--with-Judy,