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Message-ID: <365E70C3.37F63E93@oranda.demon.co.uk>
Date: Fri, 27 Nov 1998 09:28:35 +0000
From: "Gary V. Vaughan" <gvaughan AT oranda DOT demon DOT co DOT uk>
Organization: Aethos Communication Systems ltd.
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To: Steve <smkennedy AT uwaterloo DOT ca>
CC: beastium-list AT desk DOT nl
Subject: Re: Optimization with PGCC
References: <365E3B57 DOT 1B5908C1 AT uwaterloo DOT ca>
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Steve wrote:
> 
> Hi,
>     I just recently switched from gcc 2.8.1 to pgcc 1.1.  I would
> like to start compiling my programs passing the -O6 and -mpentiumpro
> switches to pgcc (to get the most optimization).  I would prefer not
> to have to go into each program's makefile and edit it.  Is there a
> way to do this from the command line?  I tried :  'make CFLAGS="-O6
> -mpentiumpro" but that overrides all the other CFLAGS.  I was
> wondering if there is a way to add to the other CFLAGS.  Anyone?

The easiest would be

	make CC='pgcc -O6 -mpentiumpro'

but you might end up with lines like this:

	pgcc -O6 -mpentiumpro -g -O2 -Dblah -c ...

If you are compiling a package made with autoconf, this is supposed to
work:

	CC=pgcc CFLAGS='-O6 -mpentiumpro' ./configure --options ...
	make

....but sometimes the package authors write their configure scripts badly
and this doesn't work -- that would be a bug for you to report to them
=)O|

Otherwise you probably will need to do the substitution in each
makefile:

	for file in `find . -name Makefile -print`; do
	  tmp=$file.$$
	  sed 's,-O2,-O6 -mpentiumpro,g' $file > $tmp && mv $tmp $file
	done

> 
> Thanks in advance.

You're welcome.

Cheers,
	Gary V. Vaughan