Export device arm64 rust flags to Bazel

Test: b build //build/bazel/examples/rust:all --config=android
Change-Id: I2656dc963cc4fe0c42da52a0d2a235b5cd86fa13
diff --git a/rust/config/global.go b/rust/config/global.go
index c37ac4e..4397d58 100644
--- a/rust/config/global.go
+++ b/rust/config/global.go
@@ -23,7 +23,7 @@
 
 var (
 	pctx         = android.NewPackageContext("android/soong/rust/config")
-	exportedVars = android.NewExportedVariables(pctx)
+	ExportedVars = android.NewExportedVariables(pctx)
 
 	RustDefaultVersion = "1.72.0"
 	RustDefaultBase    = "prebuilts/rust/"
@@ -111,9 +111,17 @@
 
 	pctx.StaticVariable("DeviceGlobalLinkFlags", strings.Join(deviceGlobalLinkFlags, " "))
 
-	exportedVars.ExportStringStaticVariable("RUST_DEFAULT_VERSION", RustDefaultVersion)
-	exportedVars.ExportStringListStaticVariable("GLOBAL_RUSTC_FLAGS", GlobalRustFlags)
-	exportedVars.ExportStringListStaticVariable("LINUX_HOST_GLOBAL_LINK_FLAGS", LinuxHostGlobalLinkFlags)
+	ExportedVars.ExportStringStaticVariable("RUST_DEFAULT_VERSION", RustDefaultVersion)
+	ExportedVars.ExportStringListStaticVariable("GLOBAL_RUSTC_FLAGS", GlobalRustFlags)
+	ExportedVars.ExportStringListStaticVariable("LINUX_HOST_GLOBAL_LINK_FLAGS", LinuxHostGlobalLinkFlags)
+
+	ExportedVars.ExportStringListStaticVariable("DEVICE_GLOBAL_RUSTC_FLAGS", deviceGlobalRustFlags)
+	ExportedVars.ExportStringListStaticVariable("DEVICE_GLOBAL_LINK_FLAGS",
+		android.RemoveListFromList(deviceGlobalLinkFlags, []string{
+			// The cc_config flags are retrieved from cc_toolchain by rust rules.
+			"${cc_config.DeviceGlobalLldflags}",
+			"-B${cc_config.ClangBin}",
+		}))
 }
 
 func HostPrebuiltTag(config android.Config) string {
@@ -137,5 +145,5 @@
 
 // BazelRustToolchainVars returns a string with
 func BazelRustToolchainVars(config android.Config) string {
-	return android.BazelToolchainVars(config, exportedVars)
+	return android.BazelToolchainVars(config, ExportedVars)
 }