1dnl AM_IGNORE is an extension that tells (a patched) automake not to 2dnl include the specified AC_SUBST variable in the Makefile.in that 3dnl automake generates. We don't use AC_DEFUN, since aclocal will 4dnl then complain that AM_IGNORE is a duplicate (if you are using the 5dnl patched automake/aclocal). 6m4_ifdef([AM_IGNORE],[],[m4_define([AM_IGNORE],[])]) 7