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rust: Refactor the build target to allow the use of builtin targets

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Eventually we want all architectures to be using the target as defined
by rustc. However currently some architectures can't do that and are
using the target.json specification. This puts in place the foundation
to allow the use of the builtin target definition or a target.json
specification.

Signed-off-by: Jamie Cunliffe <Jamie.Cunliffe@arm.com>
Acked-by: Masahiro Yamada <masahiroy@kernel.org>
Tested-by: Alice Ryhl <aliceryhl@google.com>
Link: https://lore.kernel.org/r/20231020155056.3495121-2-Jamie.Cunliffe@arm.com
[catalin.marinas@arm.com: squashed loongarch ifneq fix from WANG Rui]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Jamie Cunliffe
2023-10-20 16:50:55 +01:00
committed by Catalin Marinas
parent 54be6c6c5a
commit f82811e22b
5 changed files with 9 additions and 3 deletions
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5
rust/Makefile
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@@ -434,8 +434,11 @@ $(obj)/core.o: private skip_clippy = 1
$(obj)/core.o: private skip_flags = -Dunreachable_pub
$(obj)/core.o: private rustc_objcopy = $(foreach sym,$(redirect-intrinsics),--redefine-sym $(sym)=__rust$(sym))
$(obj)/core.o: private rustc_target_flags = $(core-cfgs)
$(obj)/core.o: $(RUST_LIB_SRC)/core/src/lib.rs scripts/target.json FORCE
$(obj)/core.o: $(RUST_LIB_SRC)/core/src/lib.rs FORCE
$(call if_changed_dep,rustc_library)
ifneq ($(or $(CONFIG_X86_64),$(CONFIG_LOONGARCH)),)
$(obj)/core.o: scripts/target.json
endif
$(obj)/compiler_builtins.o: private rustc_objcopy = -w -W '__*'
$(obj)/compiler_builtins.o: $(src)/compiler_builtins.rs $(obj)/core.o FORCE