[ax_enable_debug=yes
AC_DEFINE([DEBUG],[1],[Define to 1 to enable debugging code.])
AX_CHECK_LIBRARY([MCHECK],[mcheck.h],[mcheck],[AX_APPEND_LINK_FLAGS([-lmcheck])])],
+ AX_ADD_AM_MACRO([AM_YFLAGS+= --debug dnl Setting bison debugging
+ ])
[ax_enable_debug=no
AC_SUBST([MCHECK])
AC_DEFINE([DEBUG],[0],[Define to 1 to enable debugging code.])])