[PATCH v2 00/10] kbuild: userprogs: introduce architecture-specific CC_CAN_LINK and userprog flags

[Thomas Weißschuh]

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 at 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-v1-0-2d9f7f411083@linutronix.de

---
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 at linutronix.de>