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.

diff --git a/mk/llvm.mk b/mk/llvm.mk
index 1cbf4a9fb841c26db01d99472f25fe9fd931f938..b2a90f583f7b2bf445cd823095a7ca0f4e947454 100644 (file)
--- a/mk/llvm.mk
+++ b/mk/llvm.mk
@@ -64,10 +64,10 @@ $$(LLVM_AR_$(1)): $$(LLVM_CONFIG_$(1))
 # when we changed something not otherwise captured by builtin
 # dependencies. In these cases, commit a change that touches
 # the stamp in the source dir.
-$$(LLVM_STAMP_$(1)): $(S)src/rustllvm/llvm-auto-clean-trigger
+$$(LLVM_STAMP_$(1)): $$(S)src/rustllvm/llvm-auto-clean-trigger
        @$$(call E, make: cleaning llvm)
-       $(Q)touch $$@.start_time
-       $(Q)$(MAKE) clean-llvm$(1)
+       $$(Q)touch $$@.start_time
+       $$(Q)$$(MAKE) clean-llvm$(1)
        @$$(call E, make: done cleaning llvm)
        touch -r $$@.start_time $$@ && rm $$@.start_time