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kbuild: rust: re-run Kconfig if the version text changes

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Re-run Kconfig if we detect the Rust compiler has changed via the version
text, like it is done for C.

Unlike C, and unlike `RUSTC_VERSION`, the `RUSTC_VERSION_TEXT` is kept
under `depends on RUST`, since it should not be needed unless `RUST`
is enabled.

Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
Tested-by: Alice Ryhl <aliceryhl@google.com>
Acked-by: Masahiro Yamada <masahiroy@kernel.org>
Link: https://lore.kernel.org/r/20240902165535.1101978-3-ojeda@kernel.org
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
This commit is contained in:
Miguel Ojeda 2024-09-02 18:55:29 +02:00
parent 6e74c6b5a4
commit 5134a335cf
2 changed files with 8 additions and 4 deletions
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8
Makefile
View File

@ -648,9 +648,11 @@ endif
# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
# CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
# and from include/config/auto.conf.cmd to detect the compiler upgrade.
# CC_VERSION_TEXT and RUSTC_VERSION_TEXT are referenced from Kconfig (so they
# need export), and from include/config/auto.conf.cmd to detect the compiler
# upgrade.
CC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1))
RUSTC_VERSION_TEXT = $(subst $(pound),,$(shell $(RUSTC) --version 2>/dev/null))
ifneq ($(findstring clang,$(CC_VERSION_TEXT)),)
include $(srctree)/scripts/Makefile.clang
@ -671,7 +673,7 @@ ifdef config-build
# KBUILD_DEFCONFIG may point out an alternative default configuration
# used for 'make defconfig'
include $(srctree)/arch/$(SRCARCH)/Makefile
export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT RUSTC_VERSION_TEXT
config: outputmakefile scripts_basic FORCE
$(Q)$(MAKE) $(build)=scripts/kconfig $@

4
init/Kconfig
View File

@ -1927,7 +1927,9 @@ config RUST
config RUSTC_VERSION_TEXT
string
depends on RUST
default "$(shell,$(RUSTC) --version 2>/dev/null)"
default "$(RUSTC_VERSION_TEXT)"
help
See `CC_VERSION_TEXT`.
config BINDGEN_VERSION_TEXT
string