Merge "Error on USE_CLANG_PLATFORM_BUILD="
diff --git a/core/envsetup.mk b/core/envsetup.mk
index c3cd3c5..1a79ce2 100644
--- a/core/envsetup.mk
+++ b/core/envsetup.mk
@@ -475,3 +475,9 @@
 ifeq ($(USE_CLANG_PLATFORM_BUILD),)
 USE_CLANG_PLATFORM_BUILD := true
 endif
+
+ifneq ($(USE_CLANG_PLATFORM_BUILD),true)
+ifneq ($(USE_CLANG_PLATFORM_BUILD),false)
+$(error USE_CLANG_PLATFORM_BUILD must be true or false)
+endif
+endif