Portability/cross-compile fixes from Chris G. Demetriou

Makefile

@@ -86,7 +86,9 @@ endif
 # Compiler and Linker Options
 # You may need to uncomment and edit these if you are using libc5 and IPv6.
 COPTS = -D_GNU_SOURCE -O2 -Wall -g # -I/usr/inet6/include
+ifeq ($(origin LOPTS), undefined)
 LOPTS = 
+endif
 RESLIB = # -L/usr/inet6/lib -linet6
 
 ifeq ($(HAVE_AFDECnet),1)
@@ -113,8 +115,10 @@ LDFLAGS	= $(LOPTS) -L$(NET_LIB_PATH)
 
 SUBDIRS	= man/ $(NET_LIB_PATH)/
 
+ifeq ($(origin CC), undefined)
 CC	= gcc
-LD	= gcc
+endif
+LD	= $(CC)
 
 NLIB	= -l$(NET_LIB_NAME)
 
@@ -136,15 +140,15 @@ mostlyclean:
 
 clean: mostlyclean
 		rm -f $(PROGS)
-		@for i in $(SUBDIRS); do (cd $$i && make clean) ; done
-		@cd po && make clean
+		@for i in $(SUBDIRS); do (cd $$i && $(MAKE) clean) ; done
+		@cd po && $(MAKE) clean
 
 cleanconfig:
 		rm -f config.h
 
 clobber: 	clean
 		rm -f $(PROGS) config.h version.h config.status
-		@for i in $(SUBDIRS); do (cd $$i && make clobber) ; done
+		@for i in $(SUBDIRS); do (cd $$i && $(MAKE) clobber) ; done
 
 
 dist: 		clobber
@@ -155,8 +159,8 @@ dist: 		clobber
 config.h: 	config.in Makefile 
 		@echo "Configuring the Linux net-tools (NET-3 Base Utilities)..." ; echo
 		@if [ config.status -nt config.in ]; \
-			then ./configure.sh <config.status; \
-		   else ./configure.sh <config.in; \
+			then ./configure.sh config.status; \
+		   else ./configure.sh config.in; \
 		 fi
 
 

configure.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # Configure.sh	Generates interactively a config.h from config.in
 #
@@ -43,6 +43,14 @@ MAKECONFIG=config.make
 # Enable function cacheing.
 set -f -h
 
+# set up reading of config file
+if [ "$#" != "1" ] || [ ! -f "$1" ]; then
+	echo "usage: $0 configfile" 1>&2
+	exit 1
+fi
+exec 7<$1
+config_fd_redir='<&7'
+
 #
 # readln reads a line into $ans.
 #
@@ -51,7 +59,7 @@ set -f -h
 function readln()
 {
   echo -n "$1"
-  IFS='@' read ans </dev/tty || exit 1
+  IFS='@' read ans || exit 1
   [ -z "$ans" ] && ans=$2
 }
 
@@ -107,7 +115,7 @@ function int()
   stack=''
   branch='t'
 
-  while IFS='@' read raw_input_line
+  while IFS='@' eval read raw_input_line ${config_fd_redir}
   do
 	# Slimy hack to get bash to rescan a line.
 	read cmd rest <<-END_OF_COMMAND

lib/Makefile

@@ -39,7 +39,7 @@ all:	lib$(NET_LIB_NAME).a # lib$(NET_LIB_NAME).so
 lib$(NET_LIB_NAME).a:	Makefile $(TOPDIR)/config.h $(OBJS)
 			@echo Building $@
 			@rm -f $@
-			@ar rcs $@ $(OBJS)
+			@$(AR) rcs $@ $(OBJS)
 
 .a.so:;
 	$(CC) -o $@ -shared -Wl,--whole-archive -Wl,--soname -Wl,$(SONAME) -nostdlib -nostartfiles $<

slattach.c

@@ -28,6 +28,7 @@
  *		Foundation;  either  version 2 of the License, or  (at
  *		your option) any later version.
  */
+#include <sys/param.h>
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/ioctl.h>