From: Thomas Petazzoni via buildroot <buildroot@buildroot.org>
To: Alexander Egorenkov <egorenar@linux.ibm.com>
Cc: buildroot@buildroot.org
Subject: Re: [Buildroot] S390 Buildroot/gcc build issue
Date: Wed, 26 Aug 2026 22:04:45 +0200 [thread overview]
Message-ID: <ao9GvpCwy_2UKUEn@windsurf> (raw)
In-Reply-To: <anw8fVxA-RNGqSl1@windsurf>
Hello Alexander,
Do you have some updates about the S390 gcc build issues? (See below).
Thanks a lot for your feedback,
Thomas
On Wed, Aug 12, 2026 at 11:29:02AM +0200, Thomas Petazzoni wrote:
> Hello,
>
> On Wed, Aug 12, 2026 at 11:11:10AM +0200, Alexander Egorenkov wrote:
>
> > the types _Decimal* require for the host compiler to be built with
> > --enable-decimal-float.
>
> What do you call the "host compiler" in this context?
>
> Are you talking about the native gcc compiler available on the host,
> or the cross-compiler built by Buildroot?
>
> >
> > package/gcc/gcc.mk:
> > -------------------
> >
> > HOST_GCC_COMMON_CONF_OPTS = \
> > --target=$(GNU_TARGET_NAME) \
> > --with-sysroot=$(STAGING_DIR) \
> > --enable-__cxa_atexit \
> > --with-gnu-ld \
> > --disable-libssp \
> > --disable-multilib \
> > --disable-decimal-float <----- !!!
>
> These are the common options...
>
> > Can we turn --disable-decimal-float into --enable-decimal-float on
> > s390x arch ? It fixed the problem for me.
> >
> > package/gcc/gcc.mk:
> > -------------------
> >
> > ifeq ($(BR2_s390x),y)
> > HOST_GCC_COMMON_CONF_OPTS += \
> > --with-long-double-128 \
> > --enable-decimal-float <----- !!!
>
> and for S390, it gets overridden.
>
> See: it's the same variable that gets appended, so at the end we have:
>
> HOST_GCC_COMMON_CONF_OPTS = \
> [...]
> --disable-decimal-float \
> [...]
> --enable-decimal-float
>
> So on S390, the cross-compiler is built with --enable-decimal-float.
>
> Best regards,
>
> Thomas
> --
> Thomas Petazzoni, co-owner and CEO, Bootlin
> Embedded Linux and Kernel engineering and training
> https://bootlin.com
--
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
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prev parent reply other threads:[~2026-08-26 20:04 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-11 11:42 [Buildroot] S390 Buildroot/gcc build issue Thomas Petazzoni via buildroot
2026-08-12 9:11 ` Alexander Egorenkov
2026-08-12 9:28 ` Thomas Petazzoni via buildroot
2026-08-12 9:32 ` Alexander Egorenkov
2026-08-26 20:04 ` Thomas Petazzoni via buildroot [this message]
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