From: Miguel Ojeda <[email protected]>
Rust 1.93.0 (expected 2026-01-22) is stabilizing `-Zno-jump-tables`
[1][2] as `-Cjump-tables=n` [3].
Without this change, one would eventually see:
RUSTC L rust/core.o
error: unknown unstable option: `no-jump-tables`
Thus support the upcoming version.
Link: https://github.com/rust-lang/rust/issues/116592 [1]
Link: https://github.com/rust-lang/rust/pull/105812 [2]
Link: https://github.com/rust-lang/rust/pull/145974 [3]
Reviewed-by: Alice Ryhl <[email protected]>
Reviewed-by: Trevor Gross <[email protected]>
Acked-by: Nicolas Schier <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Miguel Ojeda <[email protected]>
(cherry picked from commit 789521b4717fd6bd85164ba5c131f621a79c9736)
Signed-off-by: Harish Sadineni <[email protected]>
---
arch/loongarch/Makefile | 2 +-
arch/x86/Makefile | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/loongarch/Makefile b/arch/loongarch/Makefile
index ae419e32f22e..c598515bdc76 100644
--- a/arch/loongarch/Makefile
+++ b/arch/loongarch/Makefile
@@ -109,7 +109,7 @@ endif
ifdef CONFIG_RUSTC_HAS_ANNOTATE_TABLEJUMP
KBUILD_RUSTFLAGS += -Cllvm-args=--loongarch-annotate-tablejump
else
-KBUILD_RUSTFLAGS += -Zno-jump-tables # keep compatibility with
older compilers
+KBUILD_RUSTFLAGS += $(if $(call
rustc-min-version,109300),-Cjump-tables=n,-Zno-jump-tables) # keep
compatibility with older compilers
endif
ifdef CONFIG_LTO_CLANG
# The annotate-tablejump option can not be passed to LLVM backend when LTO is
enabled.
diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 1913d342969b..59fac654da7b 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -109,7 +109,7 @@ ifeq ($(CONFIG_X86_KERNEL_IBT),y)
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104816
#
KBUILD_CFLAGS += $(call cc-option,-fcf-protection=branch -fno-jump-tables)
-KBUILD_RUSTFLAGS += -Zcf-protection=branch -Zno-jump-tables
+KBUILD_RUSTFLAGS += -Zcf-protection=branch $(if $(call
rustc-min-version,109300),-Cjump-tables=n,-Zno-jump-tables)
else
KBUILD_CFLAGS += $(call cc-option,-fcf-protection=none)
endif
--
2.49.0
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