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Re: Building Gforth for Apple's new Arm-based Macs

From: Anton Ertl
Subject: Re: Building Gforth for Apple's new Arm-based Macs
Date: Wed, 20 Jan 2021 00:08:04 +0100
User-agent: NeoMutt/20170113 (1.7.2)

On Tue, Jan 19, 2021 at 02:42:10PM -0500, Craig Treleaven wrote:
> Hi:
> I contribute a little to the MacPorts project.  MacPorts packages many, many 
> open source software titles for use on Macintosh.  I noticed that Gforth 
> failed to build on our new buildbot running on an M1 machine(aka Apple’s 64 
> bit ARM SOC).  The configure phase reported the following error:
> checking build system type... Invalid configuration 
> `arm64-apple-darwin20.1.0': machine `arm64-apple' not recognized
> configure: error: /bin/sh ./config.sub arm64-apple-darwin20.1.0 failed

config.sub apparently does not know this architecture under the name
arm64, but instead under the name aarch64.

> For a number of years, we’ve invoked configure thusly on Intel 64 bit-based 
> Macs:
> ./configure --prefix=/opt/local --build=x86_64-apple-darwin14.5.0 
> I browsed through but I have only a rudimentary knowledge of 
> auto tools and couldn’t determine if the “-build” flag was even necessary;

If you are not cross-building, you don't need --build.  configure then
looks at the current machine and guesses the machine from that (with

> Incidentally, MacPorts tries to support even very old Macintosh systems 
> including PPC (both 32 and 64 bit) as well as Intel i386 and X86_64.  With 
> arm64 added to the mix, that is up to 5 archs!


- anton

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