| From: |
| Thomas Weißschuh <thomas.weissschuh-AT-linutronix.de> |
| To: |
| Nathan Chancellor <nathan-AT-kernel.org>, Nicolas Schier <nicolas.schier-AT-linux.dev>, Nicolas Schier <nsc-AT-kernel.org>, Paul Walmsley <pjw-AT-kernel.org>, Palmer Dabbelt <palmer-AT-dabbelt.com>, Albert Ou <aou-AT-eecs.berkeley.edu>, Alexandre Ghiti <alex-AT-ghiti.fr>, Heiko Carstens <hca-AT-linux.ibm.com>, Vasily Gorbik <gor-AT-linux.ibm.com>, Alexander Gordeev <agordeev-AT-linux.ibm.com>, Christian Borntraeger <borntraeger-AT-linux.ibm.com>, Sven Schnelle <svens-AT-linux.ibm.com>, Madhavan Srinivasan <maddy-AT-linux.ibm.com>, Michael Ellerman <mpe-AT-ellerman.id.au>, Nicholas Piggin <npiggin-AT-gmail.com>, Christophe Leroy <christophe.leroy-AT-csgroup.eu>, Thomas Bogendoerfer <tsbogend-AT-alpha.franken.de>, Thomas Gleixner <tglx-AT-linutronix.de>, Ingo Molnar <mingo-AT-redhat.com>, Borislav Petkov <bp-AT-alien8.de>, Dave Hansen <dave.hansen-AT-linux.intel.com>, x86-AT-kernel.org, "H. Peter Anvin" <hpa-AT-zytor.com>, "David S. Miller" <davem-AT-davemloft.net>, Andreas Larsson <andreas-AT-gaisler.com> |
| Subject: |
| [PATCH v2 00/10] kbuild: userprogs: introduce architecture-specific CC_CAN_LINK and userprog flags |
| Date: |
| Tue, 14 Oct 2025 15:05:15 +0200 |
| Message-ID: |
| <20251014-kbuild-userprogs-bits-v2-0-faeec46e887a@linutronix.de> |
| Cc: |
| linux-kbuild-AT-vger.kernel.org, linux-kernel-AT-vger.kernel.org, Masahiro Yamada <masahiroy-AT-kernel.org>, linux-riscv-AT-lists.infradead.org, linux-s390-AT-vger.kernel.org, linuxppc-dev-AT-lists.ozlabs.org, linux-mips-AT-vger.kernel.org, sparclinux-AT-vger.kernel.org, Thomas Weißschuh <thomas.weissschuh-AT-linutronix.de> |
| Archive-link: |
| Article |
The current logic to inherit -m32/-m64 from the kernel build only works
for a few architectures. It does not handle byte order differences,
architectures using different compiler flags or different kinds of ABIs.
Introduce a per-architecture override mechanism to set CC_CAN_LINK and
the flags used for userprogs.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
Changes in v2:
- Rebase and drop already applied patch
- Disable CC_CAN_LINK if the test program generates warnings
- Move to architecture-specific logic
- Link to v1: https://lore.kernel.org/r/20250813-kbuild-userprogs-bits-...
---
Thomas Weißschuh (10):
kbuild: don't enable CC_CAN_LINK if the dummy program generates warnings
init: deduplicate cc-can-link.sh invocations
kbuild: allow architectures to override CC_CAN_LINK
riscv: Implement custom CC_CAN_LINK
s390: Implement custom CC_CAN_LINK
powerpc: Implement custom CC_CAN_LINK
MIPS: Implement custom CC_CAN_LINK
x86/Kconfig: Implement custom CC_CAN_LINK
sparc: Implement custom CC_CAN_LINK
kbuild: simplify CC_CAN_LINK
Makefile | 8 ++++++--
arch/mips/Kconfig | 15 +++++++++++++++
arch/powerpc/Kconfig | 15 +++++++++++++++
arch/riscv/Kconfig | 11 +++++++++++
arch/s390/Kconfig | 11 +++++++++++
arch/sparc/Kconfig | 11 +++++++++++
arch/x86/Kconfig | 11 +++++++++++
init/Kconfig | 7 +++++--
scripts/Kconfig.include | 3 +++
scripts/cc-can-link.sh | 2 +-
10 files changed, 89 insertions(+), 5 deletions(-)
---
base-commit: 10f8210c7a7098897fcee5ca70236167b39eb797
change-id: 20250813-kbuild-userprogs-bits-03c117da4d50
Best regards,
--
Thomas Weißschuh <thomas.weissschuh@linutronix.de>
