[comp.lang.c++] At&t 2.1 on DECstations? help!

ins_asag@jhunix.hcf.jhu.edu (Steven Gabriel) (05/04/91)

Hi.  I just got the tape of 2.1 from AT&T.  It does not
make any mention of installability on DEC ULTRIX for DECStations,
but I wonder if anyone has mods to carry this out.  Thanks.

pauld@stowe.cs.washington.edu (Paul Barton-Davis) (05/08/91)

In article <8245@jhunix.HCF.JHU.EDU> ins_asag@jhunix.hcf.jhu.edu (Steven Gabriel) writes:
>Hi.  I just got the tape of 2.1 from AT&T.  It does not
>make any mention of installability on DEC ULTRIX for DECStations,
>but I wonder if anyone has mods to carry this out.  Thanks.

I'm just wrapping up on this. Some brief notes, since I can't post
diffs for this stuff:

	1) you *can* bootstrap 2.1 on ultrix. So follow the part
		about bootstrapping on a Sun/VAX/3b2. It will work

	2) there are problems with the header files:

		- iostream.h includes memory.h, but memory.h is
			only marked "usedby" a few systems. memory.h
			needs its "usedby" line changed to "all"

		- stdio.h (and perhaps others) for ultrix needs
		stddef.h. Most of the ultrix system headers 
		include this in them:

		#ifndef _SIZE_T_
		typedef unsigned int size_t;
		#define _SIZE_T_
		#endif

		which is not how C++ intends to work - the typedef
`		for size_t is supposed to be in stddef.h.

	
		- also, stdlib.h contains 

			long clock();

		Under Ultrix, time.h contains 

			clock_t clock();

		so you have to get rid of the one in stdlib.h

To fix this and other problems, I decided to treat ultrix as its own
OS, rather than BSD4.2 or whatever. Below is a small script that helps
a lot in doing this - it adds the new os name using a prototype as the
model (ultrix, bsd42 in my case). I've used this so far for ultrix,
and dynix, which I'm in the middle of.

There's lots more, but I'll let Steve contact me direct.

Paul Barton-Davis <pauld@cs.washington.edu> UW Computer Science Lab	 

"People cannot cooperate towards common goals if they are forced to
 compete with each other in order to guarantee their own survival."

--- add-os -------------------
#! /bin/sh

# How to add a new operating system (or variant)

# to the prototype header files. This script takes a new operating
# system identifier (e.g. foonix) and a prototype, whose use of header
# files in similar to the new OS.  and then modifies each file to add
# the new OSidentifier to the list that use that file.

usage="`basename $0` new-os-name prototype"

if [ $# -lt 2 ] ; then
	echo usage: $usage
	exit 1
fi

if [ "$PROTOHEADERS" ]
then
	echo 
	echo "Using proto-headers: $PROTOHEADERS"
	echo
	PROTOS=$PROTOHEADERS
else
	PROTOS=./proto-headers
fi

# check that this OS is not already defined in the "usedby"
# lines

begin=`pwd`

for dir in $PROTOS $PROTOS/sys $PROTOS/arpa $PROTOS/nfs $PROTOS/ufs
do
   cd $begin
   cd $dir
   echo "Checking for duplicate OS identifiers in $dir ... "
   if grep "^#usedby.*$1" *.h >/dev/null 2>&1; then
      echo "this operating system name ($1) is already in use"
      echo "please choose an alternate identifier"
      exit 1
   fi
done

# Now make the change

for dir in $PROTOS $PROTOS/sys $PROTOS/arpa $PROTOS/nfs $PROTOS/ufs
do
   cd $begin
   cd $dir
   echo "Adding new identifiers $1 to headers in $dir  ... "

   for file in *.h
   do
       awk '
BEGIN           { found = 0 ; prototype = "'$2'" ; new_os = "'$1'" }
/^#(usedby|os)/ { add = 0
                  for (i = 2; i < NF; i++)
                     if ($i == prototype)
                     {
                         add = 1
                         found = 13
                      }
                   if (add)
                      print $0 " " new_os
                   else
                      print
                   next
                 }
                 { print }
END	         { exit (found) }
' $file > $file.H

      if [ $? -eq 13 ] ; then
         echo "Identifier added to $file"
         mv -f $file.H $file
      else
         echo "Prototype not found in $file"
         rm -f $file.H 2>/dev/null
      fi
   done
done


-- 
Paul Barton-Davis <pauld@cs.washington.edu> UW Computer Science Lab	 

"People cannot cooperate towards common goals if they are forced to
 compete with each other in order to guarantee their own survival."