diff --git i/doc/autoconf.texi w/doc/autoconf.texi 
index 78a2c67..506d966 100644 
--- i/doc/autoconf.texi 
+++ w/doc/autoconf.texi 
@@ -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.
@@ -8013,10 +8013,10 @@
 @code{ac_cv_f77_libs} or @code{ac_cv_fc_libs}, respectively.
 @end defmac
 
-@defmac AC_F77_DUMMY_MAIN (@ovar{action-if-found}, @dvar{action-if-not-found, @
-  AC_MSG_FAILURE})
-@defmacx AC_FC_DUMMY_MAIN (@ovar{action-if-found}, @dvar{action-if-not-found, @
-  AC_MSG_FAILURE})
+@defmac AC_F77_DUMMY_MAIN (@ovar{action-if-found}, @
+  @dvar{action-if-not-found, AC_MSG_FAILURE})
+@defmacx AC_FC_DUMMY_MAIN (@ovar{action-if-found}, @
+  @dvar{action-if-not-found, AC_MSG_FAILURE})
 @acindex{F77_DUMMY_MAIN}
 @cvindex F77_DUMMY_MAIN
 @acindex{FC_DUMMY_MAIN}
@@ -8267,8 +8267,8 @@
 @code{ac_cv_fc_pp_srcext_@var{ext}} variables, respectively.
 @end defmac
 
-@defmac AC_FC_PP_DEFINE (@ovar{action-if-success}, @dvar{action-if-failure, @
-  AC_MSG_FAILURE})
+@defmac AC_FC_PP_DEFINE (@ovar{action-if-success}, @
+  @dvar{action-if-failure, AC_MSG_FAILURE})
 @acindex{FC_PP_DEFINE}
 @caindex fc_pp_define
 
@@ -8286,8 +8286,8 @@
 variable.
 @end defmac
 
-@defmac AC_FC_FREEFORM (@ovar{action-if-success}, @dvar{action-if-failure, @
-  AC_MSG_FAILURE})
+@defmac AC_FC_FREEFORM (@ovar{action-if-success}, @
+  @dvar{action-if-failure, AC_MSG_FAILURE})
 @acindex{FC_FREEFORM}
 @caindex fc_freeform
 
@@ -8313,8 +8313,8 @@
 the @code{ac_cv_fc_freeform} variable.
 @end defmac
 
-@defmac AC_FC_FIXEDFORM (@ovar{action-if-success}, @dvar{action-if-failure, @
-  AC_MSG_FAILURE})
+@defmac AC_FC_FIXEDFORM (@ovar{action-if-success}, @
+  @dvar{action-if-failure, AC_MSG_FAILURE})
 @acindex{FC_FIXEDFORM}
 @caindex fc_fixedform