+AC_CACHE_CHECK([if bison is the parser generator],
+ [collectd_cv_prog_bison],
+ [AS_IF([$YACC --version 2>/dev/null | $EGREP -q '^bison '],
+ [collectd_cv_prog_bison=yes], [collectd_cv_prog_bison=no]
+ )]
+)
+
+if test "x$collectd_cv_prog_bison" = "xno" && test ! -f "${srcdir}/src/liboconfig/parser.c"
+then
+ AC_MSG_ERROR([bison is missing and you do not have ${srcdir}/src/liboconfig/parser.c. Please install bison])
+fi
+