Re: [PATCH 3/4] tests/tcg: add alternative cross-compilers for fedora

["Daniel P. Berrangé" <berrange@redhat.com>]

On Fri, Sep 25, 2026 at 08:57:08AM -0700, Pierrick Bouvier wrote:
> On 9/25/2026 8:54 AM, Daniel P. Berrangé wrote:
> > On Fri, Sep 25, 2026 at 08:20:44AM -0700, Pierrick Bouvier wrote:
> >> On 9/25/2026 2:40 AM, Daniel P. Berrangé wrote:
> >>> On Thu, Sep 24, 2026 at 09:39:41PM +0000, Pierrick Bouvier wrote:
> >>>> This allows to pick host compiler automatically on fedora, as those
> >>>> binaries are installed with 'gcc' package.
> >>>>
> >>>> This covers all host arch supported to this day:
> >>>> https://fedoraproject.org/wiki/Architectures
> >>>> - x86_64
> >>>> - aarch64
> >>>> - ppc64le
> >>>> - riscv64
> >>>> - s390x
> >>>> Note: QEMU and Fedora don't support 32-bit hosts anymore.
> >>>
> >>> Regardless of what installation arches Fedora targets, it
> >>> ships cross compilers for pretty much everything. In F44
> >>> I see the following GCC available:
> >>>
> >>> gcc-aarch64-linux-gnu.x86_64         16.2.1-1.fc44 updates
> >>> gcc-alpha-linux-gnu.x86_64           16.2.1-1.fc44 updates
> >>> gcc-arc-linux-gnu.x86_64             16.2.1-1.fc44 updates
> >>> gcc-arm-linux-gnu.x86_64             16.2.1-1.fc44 updates
> >>> gcc-avr32-linux-gnu.x86_64           16.2.1-1.fc44 updates
> >>> gcc-bfin-linux-gnu.x86_64            16.2.1-1.fc44 updates
> >>> gcc-c6x-linux-gnu.x86_64             16.2.1-1.fc44 updates
> >>> gcc-frv-linux-gnu.x86_64             16.2.1-1.fc44 updates
> >>> gcc-h8300-linux-gnu.x86_64           16.2.1-1.fc44 updates
> >>> gcc-hppa-linux-gnu.x86_64            16.2.1-1.fc44 updates
> >>> gcc-hppa64-linux-gnu.x86_64          16.2.1-1.fc44 updates
> >>> gcc-ia64-linux-gnu.x86_64            16.2.1-1.fc44 updates
> >>> gcc-loongarch64-linux-gnu.x86_64     16.2.1-1.fc44 updates
> >>> gcc-m68k-linux-gnu.x86_64            16.2.1-1.fc44 updates
> >>> gcc-microblaze-linux-gnu.x86_64      16.2.1-1.fc44 updates
> >>> gcc-mips64-linux-gnu.x86_64          16.2.1-1.fc44 updates
> >>> gcc-mn10300-linux-gnu.x86_64         16.2.1-1.fc44 updates
> >>> gcc-openrisc-linux-gnu.x86_64        16.2.1-1.fc44 updates
> >>> gcc-powerpc64-linux-gnu.x86_64       16.2.1-1.fc44 updates
> >>> gcc-powerpc64le-linux-gnu.x86_64     16.2.1-1.fc44 updates
> >>> gcc-ppc64-linux-gnu.x86_64           16.2.1-1.fc44 updates
> >>> gcc-ppc64le-linux-gnu.x86_64         16.2.1-1.fc44 updates
> >>> gcc-riscv32-linux-gnu.x86_64         16.2.1-1.fc44 updates
> >>> gcc-riscv64-linux-gnu.x86_64         16.2.1-1.fc44 updates
> >>> gcc-s390x-linux-gnu.x86_64           16.2.1-1.fc44 updates
> >>> gcc-sparc64-linux-gnu.x86_64         16.2.1-1.fc44 updates
> >>> gcc-x86_64-linux-gnu.x86_64          16.2.1-1.fc44 updates
> >>> gcc-xtensa-linux-gnu.x86_64          16.2.1-1.fc44 updates
> >>>
> >>>
> >>
> >> We want to detect host compiler here (redhat-* variants), as mentioned
> >> in commit description. It addresses original request from Paolo. Cross
> >> compilers above are already detected with current cc field.
> > 
> > Oh, I see what you mean. Itis dealing with the naming difference
> > between  'redhat-linux-gnu' and just 'linux-gnu' in the compilers
> > for the native vs cross arch RPMs.
> >
> 
> Right.
> I'm not super familiar with Fedora, is there any fundamental difference
> between this toolchain and linux-gnu variant, in terms of ABI or
> anything else? Or is it just a distinction for "Our toolchain with
> additional patches" vs upstream one?

Most of the downstream patches are common to both the native
and cross GCC RPMs. I'm not aware of significant differences
between the two that would matter for QEMU's needs.

With regards,
Daniel
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