+dnl Host-specific configuration.
+
+AC_DEFUN([catacomb_CPU_FAMILIES],
+ [$1([i[[3-6]]86], [X86])])
+
+case $host_cpu in
+ m4_define([catacomb_CPU_CASE],
+ [$1)
+ AC_DEFINE([CPUFAM_$2], [1], [Define if host CPU family is $2.])
+ cpufam=$2
+ ;;
+])
+ catacomb_CPU_FAMILIES([catacomb_CPU_CASE])
+ *) cpufam=nil ;;
+esac
+m4_define([catacomb_CPU_DEFS],
+ [AM_CONDITIONAL([CPUFAM_$2], [test x$cpufam = x$2])])
+catacomb_CPU_FAMILIES([catacomb_CPU_DEFS])
+
+dnl--------------------------------------------------------------------------