From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <67e4d0662728cd9c542ad21896a4ea09@collyer.net>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] drawterm
From: Geoff Collyer <geoff@collyer.net>
In-Reply-To: <Pine.LNX.4.44.0309100941360.24049-100000@fbsd.cpsc.ucalgary.ca>
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Date: Wed, 10 Sep 2003 14:00:08 -0700
Topicbox-Message-UUID: 30a44822-eacc-11e9-9e20-41e7f4b1d025

gcc takes greater liberties when optimising than Ken's compilers do,
and most Plan 9 code doesn't use `volatile', so I use a wrapper (agcc)
to disable some optimisations, and set CC=agcc in my [Mm]a?ke?files on
Unix.

cpu% cat openbsd/bin/sh/agcc
#!/bin/sh
# agcc - invoke gcc in ANSI mode with less-aggressive optimisation.
# --writable-strings is a concession to pre-ansi programs like pre-plan-9 mk.
exec gcc -ansi -pipe -fvolatile -fvolatile-global --writable-strings "$@"

If your gcc implements it (e.g. on MacOS 10.2), add
`-fvolatile-static'.

It's probably best to start with no -O options and see if the
resulting binary works correctly before trying to add -O options.