Index: make/platform/clang_mingw.mk
===================================================================
--- /dev/null
+++ make/platform/clang_mingw.mk
@@ -0,0 +1,29 @@
+Description := Static runtime libraries for mingw-w64
+
+###
+
+CC := clang
+AR := llvm-ar
+
+Arch :=
+Configs :=
+
+SupportedArches := x86_64
+
+Configs += builtins-x86_64
+Arch.builtins-x86_64 := x86_64
+
+###
+
+CFLAGS := -Wall -Werror -O3 -fomit-frame-pointer
+CFLAGS.builtins-x86_64 := -target x86_64-windows-gnu $(CFLAGS) -rtlib=compiler-rt -m64
+
+FUNCTIONS.builtins-x86_64 := $(CommonFunctions) $(ArchFunctions.x86_64) chkstk
+
+# Always use optimized variants.
+OPTIMIZED := 1
+
+# We don't need to use visibility hidden on Linux.
+VISIBILITY_HIDDEN := 0
+
+SHARED_LIBRARY_SUFFIX := a