Trivial configurer

configure

+#!/bin/sh
+
+sysname=$1
+
+uname=`uname -s`
+machine=`uname -m`
+
+if [ "$sysname" = "" ]; then
+  case $uname in
+    ULTRIX)
+      sysname=ultrix;;
+    BSD/OS)
+      sysname=bsdos;;
+    OSF1)
+      if [ $machine = 'alpha' ]; then
+        sysname = alphaosf
+      fi;;
+    Linux)
+      sysname=linux;;
+    SunOS)
+      case `uname -r` in
+        4*) sysname=sunos4;;
+        5*) sysname=sunos5-5;;
+      esac;;
+    NetBSD)
+      sysname=netbsd;;
+    FreeBSD)
+      sysname=freebsd;;
+  esac
+fi
+
+if [ "$sysname" = "" ]; then
+  echo
+  echo "Unknown system.   If this is an SCO system running ODT 3.0 or"
+  echo "higher, type \`\`./configure sco''.   Otherwise, this is a"
+  echo "configuration that isn't supported or hasn't been tested."
+  echo
+  echo "Supported configurations are:"
+  echo "   ultrix	ULTRIX 4.2A or higher"
+  echo "   bsdos	BSDI BSD/OS 2.1"
+  echo "   alphaosf	DEC Alpha OSF/1"
+  echo "   linux	Linux"
+  echo "   sunos4	Sunos 4.1.4 (earlier releases may work)"
+  echo "   sunos5-5	SunOS 5.5 (Solaris 2.5) (earlier 2.x releases may work)"
+  echo "   netbsd	NetBSD 1.1 or higher"
+  echo "   freebsd	FreeBSD"
+  exit 1;
+fi
+
+sed -e "/^##\+\+${sysname}\+\+/,/^##--${sysname}--/s/^#//" \
+		<Makefile.dist >Makefile
+
+exit 0