From mboxrd@z Thu Jan  1 00:00:00 1970
From: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Date: Fri, 8 Mar 2019 18:53:28 +0100
Subject: [U-Boot] [U-Boot,
 v2] Enable expression support for CONFIG_BOARD_SIZE_LIMIT
In-Reply-To: <20190308172816.GA12265@mail.duskware.de>
References: <20181207192751.30422-1-wd@denx.de>
 <20181214191642.GM8702@bill-the-cat>
 <CAAh8qsxhM4MEFsEh7PZYk4nBPRd2tp4ApYF=2yVY1yJNtHS7sg@mail.gmail.com>
 <20190308171709.GG5026@bill-the-cat>
 <20190308172816.GA12265@mail.duskware.de>
Message-ID: <E40B08BD-B5BF-441E-AC55-000024CD5B4B@theobroma-systems.com>
List-Id: <u-boot.lists.denx.de>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
To: u-boot@lists.denx.de



> On 08.03.2019, at 18:28, Martin Husemann <martin@NetBSD.org> wrote:
> 
> On Fri, Mar 08, 2019 at 12:17:09PM -0500, Tom Rini wrote:
>> OK, so a few thoughts here.
>> - What's the portable way to do hex-based math?  If we really need it?
> 
> Use printf(3) to convert to/from hex, and standard shell arithmetic
> with $(( )).
> 
> Looks horrible, but something like:
> 
> v=$(( $( printf "%d\n" 0xa0 ) + $( printf "%d\n" 0x10 ) ))
> printf "v = %d (%x)\n" $v $v

Can we just assume that awk is available?  After all, AWK is defined
in the top-level Makefile...

> 
> 
> ... maybe arranged into some sh helper functions.
> 
> Martin
> _______________________________________________
> U-Boot mailing list
> U-Boot at lists.denx.de
> https://lists.denx.de/listinfo/u-boot