If anyone reading is interested in following up on the homebrew bug report,
it's filed here: https://github.com/Homebrew/homebrew-core/issues/52925

- Chas

On Sat, Apr 11, 2020 at 5:46 PM Chas Leichner <c...@chas.io> wrote:

> Taylor, thanks for the help! I had install mit-scheme with homebrew and
> will file an bug with them. After installing x86-64 binary you linked to
> (and noting that the command-line binary lived at /Applications/MIT:GNU\
> Scheme\ 10.1.10.app/Contents/Resources/mit-scheme), the mechanics.com
> install went smoothly and i was able to use the mechanics code from edwin.
>
> - Chas
>
>
>
> On Sat, Apr 11, 2020 at 4:43 PM Taylor R Campbell <campb...@mumble.net>
> wrote:
>
>> > Date: Sat, 11 Apr 2020 14:12:13 -0700
>> > From: Chas Leichner <c...@chas.io>
>> >
>> > Sorry if this isn't an appropriate place to ask this question, I asked
>> > about this on #scheme and they directed me here.
>> >
>> > I'm working on reading Functional Differential Geometry and ran into a
>> > problem installing scmutils. I'm using a mac (Mojave 10.14.5 with MIT
>> > Scheme 10.1.10) which the scmutils docs say is supported, but get an
>> > architecture not supported error when I try to run it.
>> > [...]
>> > File has: compiled-code interface 3; architecture 14.
>> > Expected: compiled-code interface 3; architecture 13.
>>
>> It appears you are using the svm1 version of MIT Scheme (compiled-code
>> architecture 13), which is based on a byte code interpreter, rather
>> than the x86-64 version of MIT Scheme that gjs used to create the
>> mechanics.com band (compiled-code architecture 14), which uses native
>> x86-64 machine code.  You correctly ascertained that one cannot use
>> another's bands.
>>
>> So either you'll need to use the x86-64 version of MIT Scheme, which
>> is probably what you want anyway; or if for some reason you
>> particularly want to use svm1, you'll need to build scmutils from
>> source -- maybe ask gjs how to do that since I don't know offhand.
>>
>> How did you install MIT Scheme?  From
>>
>> https://www.gnu.org/software/mit-scheme/
>>
>> you'll need either the `Unix binary' or `macOS binary' distribution;
>> the `Portable SVM' one will not work with the band gjs provided.  If
>> you installed from Homebrew or MacPorts or something, they should be
>> changed to use the x86-64 version of MIT Scheme; there's no advantage
>> to the svm1 one.
>>
>

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