macro name as literal string?

[Bob Lockie]

I want to have the following but having the text AH_TEMPLATE is picked 
up by autoheader and a blank #undef is created.

AC_CHECK_FILE( [acconfig.h], AC_MSG_ERROR( [the config template is 
created by the AH_TEMPLATE commands in configure.in|ac so delete 
acconfig.h] ), )