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rust: kbuild: define procmacro-extension variable

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Since we are adding one more proc macro crate (`zerocopy-derive`),
we are refactoring their handling.

Thus, instead of using `libmacros_extension` as the common variable to
hold the extension for all of them, use a dedicated variable with a more
generic name (including for its implementation).

Link: https://patch.msgid.link/20260608141439.182634-6-ojeda@kernel.org
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
This commit is contained in:
Miguel Ojeda 2026-06-08 16:14:24 +02:00
parent 50f3637a45
commit 2846ebc836
1 changed files with 2 additions and 3 deletions
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5
rust/Makefile
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@ -48,10 +48,9 @@ endif
ifdef CONFIG_RUST
procmacro-name = $(shell MAKEFLAGS= $(RUSTC) --print file-names --crate-name $(1) --crate-type proc-macro - </dev/null)
procmacro-extension := $(patsubst libname.%,%,$(call procmacro-name,name))
libmacros_name := $(call procmacro-name,macros)
libmacros_extension := $(patsubst libmacros.%,%,$(libmacros_name))
libpin_init_internal_name := $(call procmacro-name,pin_init_internal)
always-$(CONFIG_RUST) += $(libmacros_name) $(libpin_init_internal_name)
@ -549,7 +548,7 @@ quiet_cmd_rustc_procmacro = $(RUSTC_OR_CLIPPY_QUIET) P $@
-Clink-args='$(call escsq,$(KBUILD_PROCMACROLDFLAGS))' \
--emit=dep-info=$(depfile) --emit=link=$@ --extern proc_macro \
--crate-type proc-macro -L$(objtree)/$(obj) \
--crate-name $(patsubst lib%.$(libmacros_extension),%,$(notdir $@)) \
--crate-name $(patsubst lib%.$(procmacro-extension),%,$(notdir $@)) \
@$(objtree)/include/generated/rustc_cfg $<
# Procedural macros can only be used with the `rustc` that compiled it.