Fixed LLVM-On-iOS

Author: mimalloc

Makefile

@@ -24,10 +24,11 @@ swift:
 	$(call log_info,bypassing lld darwin incompatibility)
 	perl -i -0pe 's|(// Swift LLVM fork downstream change start\n)(.*?)(// Swift LLVM fork downstream change end\n)|$$1/* NYXIAN: apple lies, lld works fine for MachO\n$$2*/\n$$3|s' \
 	llvm-project/lld/MachO/InputFiles.cpp
-	$(call log_info,patching swift's darwin toolchain not creating compiler jobs)
-	cp Patches/DarwinToolChains.cpp swift/lib/Driver/DarwinToolChains.cpp
 
-SwiftToolchain-iphoneos: swift
+build/LLVMClangSwift_iphoneos/llvm-macosx-x86_64:
+	mkdir -p build/LLVMClangSwift_iphoneos; cd build/LLVMClangSwift_iphoneos; ln -sfn llvm-macosx-arm64 llvm-macosx-x86_64
+
+SwiftToolchain-iphoneos: swift build/LLVMClangSwift_iphoneos/llvm-macosx-x86_64
 	$(call log_info,building iOS-native swift toolchain ($(SWIFT_BRANCH)))
 	SWIFT_BRANCH="$(SWIFT_BRANCH)" SWIFT_SOURCE_DIR="$(SWIFT_SOURCE_DIR)" Scripts/build-swift-toolchain.sh build
 
@@ -96,5 +97,4 @@ clean: clean-artifacts
 		! -name .gitignore \
 		! -name .github \
 		! -name Scripts \
-		! -name Patches \
 		-exec rm -rf {} +