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riscv: Implement ARCH_HAS_CC_CAN_LINK

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The generic CC_CAN_LINK detection relies on -m32/-m64 compiler flags.
These are not supported by riscv compilers.

Use architecture-specific logic using -mabi instead.

Prefer the 'd' ABI variant when possible as todays toolchains are most
likely to provide a libc for that one.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Link: https://patch.msgid.link/20260316-cc-can-link-riscv-v4-1-64c072b456dd@linutronix.de
Signed-off-by: Paul Walmsley <pjw@kernel.org>
This commit is contained in:
Thomas Weißschuh 2026-06-06 20:17:52 -06:00 committed by Paul Walmsley
parent c0db0690f7
commit 84894ceb3c
1 changed files with 15 additions and 0 deletions
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15
arch/riscv/Kconfig
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@ -24,6 +24,7 @@ config RISCV
select ARCH_ENABLE_SPLIT_PMD_PTLOCK if PGTABLE_LEVELS > 2
select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE
select ARCH_HAS_BINFMT_FLAT
select ARCH_HAS_CC_CAN_LINK
select ARCH_HAS_CURRENT_STACK_POINTER
select ARCH_HAS_DEBUG_VIRTUAL if MMU
select ARCH_HAS_DEBUG_VM_PGTABLE
@ -1353,6 +1354,20 @@ config PORTABLE
config ARCH_PROC_KCORE_TEXT
def_bool y
config ARCH_CC_CAN_LINK
bool
default $(cc_can_link_user,-march=rv64g -mabi=lp64d) if 64BIT && FPU
default $(cc_can_link_user,-march=rv64g -mabi=lp64) if 64BIT
default $(cc_can_link_user,-march=rv32g -mabi=ilp32d) if FPU
default $(cc_can_link_user,-march=rv32g -mabi=ilp32)
config ARCH_USERFLAGS
string
default "-march=rv64g -mabi=lp64d" if 64BIT && FPU
default "-march=rv64g -mabi=lp64" if 64BIT
default "-march=rv32g -mabi=ilp32d" if FPU
default "-march=rv32g -mabi=ilp32"
menu "Power management options"
source "kernel/power/Kconfig"