Re: Building the current snapshot on Windows with Guile

[Eli Zaretskii <eliz@gnu.org>]

> From: ludo@gnu.org (Ludovic Courtès)
> Cc: Eli Zaretskii <eliz@gnu.org>,  "gdb-patches\@sourceware.org" <gdb-patches@sourceware.org>
> Date: Wed, 11 Jun 2014 14:24:52 +0200
> 
> Doug Evans <xdje42@gmail.com> skribis:
> 
> > (*1): As Ludo suggested, we could compile these files during a gdb
> > build, but that doesn't work in a cross-compilation scenario (without
> > requiring more complexity in the build, which would be nice to avoid).
> > Are these files guaranteed to be equivalent across configurations (I'm
> > guessing not), and if not does guile provide a cross-compiler for them
> > (I'm guessing not - could be wrong of course)?
> 
> It does provide a cross-compiler (info "(guile) Compilation"):
> 
>   guix compile --target=mips64el-linux-gnu foo.scm -o foo.go
> 
> But note that the interpretation of triplets might defer from that of
> GDB.  In particular, for platforms that support several ABIs with
> different word sizes, it recognizes some specific triplet
> extensions–e.g., “mips64el-linux-gnuabi64” for the N64 ABI on MIPS.  See
> <http://git.savannah.gnu.org/cgit/guile.git/tree/module/system/base/target.scm#n76>.

Apart of the issue with multi-ABI platforms, are there any other
reasons for the *.go files to be non-portable?

E.g., if they were compiled on a 64-bit Windows 7, will they work on a
32-bit Windows XP?  Does the answer depend on whether the Guile
executable that compiled the *.scm files was a 64-bit or a 32-bit
executable?  What about compiling on GNU/Linux and using on Windows,
when the CPU is the same or from the same family?