Re: cmake 3.31.7 bootstrap illegal instruction on Sparc32 (qemu) ?

On Fri, Dec 5, 2025 at 4:06 PM Valery Ushakov <[email protected]> wrote:
>
> On Fri, Dec 05, 2025 at 11:35:23 +0300, Andrew Randrianasulu wrote:
>
> > So, I am still trying to build things from slightly older pkgsrc tree,
> > and Cmake 3.31.7 fails witch attached gzipped log, ending with illegal
> > instruction.
> >
> > Qemu line:
> > qemu-system-sparc -hda sparc-netbsd-15g-compressed.qcow2 -m 1536 -g
> > 1024x768x24 -M SS-20 -smp 3 -accel tcg,thread=multi,tb-size=256
> >
> > qemu --version:
> > qemu-system-sparc --version
> > QEMU emulator version 9.1.50 (v9.1.0-1687-gf0cfd06786-dirty)
> > Copyright (c) 2003-2024 Fabrice Bellard and the QEMU Project developers
> >
> > Note that this configuration survived gnutls , libbluray,
> > libtheora-1.2.0  builds
> > so generally it works ?

even installing pre-build pkg by Vom513 still gives illegal instruction

https://mastodon.online/@Andrew_R/115670749252048951

_atomic_fetch_add_4 in /usr/pkg/lib/libatomic.so.3 ..

even with cpu set to

qemu-system-sparc -hda sparc-netbsd-15g-compressed.qcow2 -m 1536 -g
1024x768x24 -M SS-20 -smp 3 -accel tcg,thread=multi,tb-size=256 -cpu
TI-SuperSparc-60


>
> I had varying success with qemu sparc.  Incidentally, I was trying to
> build cmake too (that I needed to build some other project, not in
> pkgsrc).
>
> cmake and/or modern c++ compilers are hogs... so I'm not surprised
> that particular combination (builing cmake on qemu sparc) might have
> reached some darker corners where qemu is not that stable.
>
> That was an year ago or so, so my memory is hazy.  But IIRC, in the
> end it was faster to loan an ultra1 from a friend setup it and build
> cmake there.
>
> PS: My first attempt to build cmake was natively on a (diskless)
> javastataion.  That gave me a new reference for "exercise in futility"
> (I think I gave up after couple of weeks or so).  That's when I turned
> to qemu.  For scale: I also needed to build cmake on macos/ppc (for
> the same project).  My mini g4 (1.25GHz cpu with 1G ram) took about a
> week to build cmake from macports from scratch.  That time was mostly
> spent builidng gcc10 and gcc14, though.  cmake proper was about a day
> only, I think.
>
> -uwe