$OpenBSD: patch-configure_ac,v 1.3 2013/03/23 23:28:14 brad Exp $
--- configure.ac.orig	Wed Feb 27 05:05:35 2013
+++ configure.ac	Sun Mar 10 22:32:05 2013
@@ -222,12 +222,14 @@ CC_FLAG_VISIBILITY([
 AM_CONDITIONAL(SYS_MSVC, test "${SYS_MSVC}" = "1")
 
 AC_ARG_ENABLE([doc],
-  AS_HELP_STRING([--disable-apidoc], [Disable building (with Doxygen) and intalling API documentation @<:@default=auto@:@>]))
+  AS_HELP_STRING([--disable-doc], [Disable building (with Doxygen) and intalling API documentation @<:@default=auto@:@>]))
 
-AC_PATH_PROG([DOXYGEN], [doxygen])
+AS_IF([test "x$enable_doc" != "xno"], [
+  AC_PATH_PROG([DOXYGEN], [doxygen])
+])
 
 AS_IF([test "x$DOXYGEN" = "x"], [
-  AS_IF([test "x$enable_apidoc" = "xyes"], [
+  AS_IF([test "x$enable_doc" = "xyes"], [
     AC_MSG_ERROR([You need Doxygen to build API documentation])
   ])
 ])
