Escape some variables in llvm.mk
The important one is $(MAKE). make handles recipes containing the literal string "$(MAKE)" specially, so it is important to make sure it isn't evaluated until recipe invocation time.
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@ -64,10 +64,10 @@ $$(LLVM_AR_$(1)): $$(LLVM_CONFIG_$(1))
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# when we changed something not otherwise captured by builtin
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# dependencies. In these cases, commit a change that touches
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# the stamp in the source dir.
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$$(LLVM_STAMP_$(1)): $(S)src/rustllvm/llvm-auto-clean-trigger
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$$(LLVM_STAMP_$(1)): $$(S)src/rustllvm/llvm-auto-clean-trigger
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@$$(call E, make: cleaning llvm)
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$(Q)touch $$@.start_time
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$(Q)$(MAKE) clean-llvm$(1)
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$$(Q)touch $$@.start_time
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$$(Q)$$(MAKE) clean-llvm$(1)
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@$$(call E, make: done cleaning llvm)
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touch -r $$@.start_time $$@ && rm $$@.start_time
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