$NetBSD: patch-ae,v 1.3 2016/08/14 18:27:05 scole Exp $

--- configure.ac	2008-02-04 23:11:37.000000000 -0500
+++ configure.ac	2016-04-20 20:09:24.000000000 -0400
@@ -33,12 +33,14 @@
     linux*)	HOST_OS=linux;;
     hpux*)	HOST_OS=hpux;;
     freebsd*)	HOST_OS=freebsd;;
+    netbsd*)	HOST_OS=netbsd;;
     *)		HOST_OS=unknown;;
 esac
 AC_SUBST(HOST_OS)
 AM_CONDITIONAL(LINUX, test "$HOST_OS" = linux)
 AM_CONDITIONAL(HPUX,  test "$HOST_OS" = hpux)
 AM_CONDITIONAL(FREEBSD, test "$HOST_OS" = freebsd)
+AM_CONDITIONAL(NETBSD, test "$HOST_OS" = netbsd)
 
 # Version number definitions
 #
@@ -80,12 +82,11 @@
 AM_INIT_AUTOMAKE($PACKAGE,$VERSION)
 
 # Specify a configuration file
-AM_CONFIG_HEADER(config.h)
+AC_CONFIG_HEADERS(config.h)
 AM_ACLOCAL_INCLUDE(macros)
 
 # Checks for programs.
 AC_PROG_CC( icc ecc gcc3 cc gcc )
-AM_PROG_CC_STDC
 AM_PROG_AS
 AC_PROG_INSTALL
 AC_PROG_LN_S
@@ -259,6 +260,10 @@
 	LDFLAGS="$LDFLAGS -lutil"
 fi
 
+if test "$HOST_OS" = netbsd; then
+	LDFLAGS="$LDFLAGS -lutil"
+fi
+
 dnl Check for optional libs
 AC_CHECK_LIB(unwind-ia64, _Uia64_get_proc_name, )
 
@@ -331,6 +336,13 @@
         check_curses=no], [])
 fi    
 
+if test "$HOST_OS" = netbsd; then
+    # Not ported to NetBSD curses yet.
+    AC_SEARCH_LIBS(tgetent, ncurses,
+	[check_curses=no],
+	[AC_MSG_ERROR(Required ncurses library not found.)])
+fi
+
 if test "x$check_curses" != xno; then
 AC_CHECK_LIB(curses, tgetent, [],
     [AC_CHECK_LIB(ncurses, tgetent, ,
@@ -347,6 +359,7 @@
     hpux10*)	CFLAGS="$CFLAGS -DHPUX1020";;
     hpux11*)	CFLAGS="$CFLAGS -DHPUX1100";;
     freebsd*)	CFLAGS="$CFLAGS -DFREEBSD -D__linux__";;
+    netbsd*)	CFLAGS="$CFLAGS -DNETBSD -D__linux__";;
 esac
 
 dnl Add extra flags to CFLAGS depending on compiler