When compile autoconf-2.65 , I encounter the following error

conftest.c:14625: must be after `@defmac’ to use `@defmacx’

After check by “google” search, the following modification can fix this issue

--- autoconf-2.65/doc/autoconf.texi 2009-11-05 10:42:15.000000000 +0800
+++ autoconf-2.65/doc/autoconf.texi.new 2013-05-28 05:41:09.243770263 +0800
@@ -15,7 +15,7 @@
 @c The ARG is an optional argument. To be used for macro arguments in
 @c their documentation (@defmac).
 @macro ovar{varname}
-@r{[}@var{\varname\}@r{]}@c
+@r{[}@var{\varname\}@r{]}
 @end macro
 
 @c @dvar(ARG, DEFAULT)
@@ -23,7 +23,7 @@
 @c The ARG is an optional argument, defaulting to DEFAULT. To be used
 @c for macro arguments in their documentation (@defmac).
 @macro dvar{varname, default}
-@r{[}@var{\varname\} = @samp{\default\}@r{]}@c
+@r{[}@var{\varname\} = @samp{\default\}@r{]}
 @end macro
 
 @c Handling the indexes with Texinfo yields several different problems.