diff --git a/cc/compiler.go b/cc/compiler.go
index f9f7b6f..a751754 100644
--- a/cc/compiler.go
+++ b/cc/compiler.go
@@ -441,12 +441,24 @@
 	// TODO: debug
 	flags.Local.CFlags = append(flags.Local.CFlags, esc(compiler.Properties.Release.Cflags)...)
 
-	CheckBadCompilerFlags(ctx, "clang_cflags", compiler.Properties.Clang_cflags)
-	CheckBadCompilerFlags(ctx, "clang_asflags", compiler.Properties.Clang_asflags)
+	if !ctx.DeviceConfig().BuildBrokenClangCFlags() && len(compiler.Properties.Clang_cflags) != 0 {
+		ctx.PropertyErrorf("clang_cflags", "property is deprecated, see Changes.md file")
+	} else {
+		CheckBadCompilerFlags(ctx, "clang_cflags", compiler.Properties.Clang_cflags)
+	}
+	if !ctx.DeviceConfig().BuildBrokenClangAsFlags() && len(compiler.Properties.Clang_asflags) != 0 {
+		ctx.PropertyErrorf("clang_asflags", "property is deprecated, see Changes.md file")
+	} else {
+		CheckBadCompilerFlags(ctx, "clang_asflags", compiler.Properties.Clang_asflags)
+	}
 
 	flags.Local.CFlags = config.ClangFilterUnknownCflags(flags.Local.CFlags)
-	flags.Local.CFlags = append(flags.Local.CFlags, esc(compiler.Properties.Clang_cflags)...)
-	flags.Local.AsFlags = append(flags.Local.AsFlags, esc(compiler.Properties.Clang_asflags)...)
+	if !ctx.DeviceConfig().BuildBrokenClangCFlags() {
+		flags.Local.CFlags = append(flags.Local.CFlags, esc(compiler.Properties.Clang_cflags)...)
+	}
+	if !ctx.DeviceConfig().BuildBrokenClangAsFlags() {
+		flags.Local.AsFlags = append(flags.Local.AsFlags, esc(compiler.Properties.Clang_asflags)...)
+	}
 	flags.Local.CppFlags = config.ClangFilterUnknownCflags(flags.Local.CppFlags)
 	flags.Local.ConlyFlags = config.ClangFilterUnknownCflags(flags.Local.ConlyFlags)
 	flags.Local.LdFlags = config.ClangFilterUnknownCflags(flags.Local.LdFlags)