Re: Building "Fat" Mac Binary, or Cross-Compiling from ARM arch to x86-64

On 1/2/25 4:59 PM, Viktor Dukhovni wrote:

> Unfortunately, that can't trivially work for OpenSSL, because
> architecture-specific assembly targets are included in the build.


Yes, that makes sense. After sending my last message I noticed that the
OpenSSL "C" files (.c) were building fine with both archs; it was when
it got to the assembly file (.S) that it started failing.

> You'd
> need to build *both* the ARM *and* X86_64 assembly targets, invoking the
> appropriate assembler on each one, and producing either object code for
> that particular platform for inclusion in the "fat" binary, or somehow
> producting a "fat" objec that is "empty" for one of the targets.
>
> How to do that, requires more detailed knowledge of fat binaries than I
> can muster.


This can be done with the "lipo" command.  It was Plan B, which is now turning into Plan A.


Regards,
Nick

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