Merge "Add host_toolchain_header path if defined"
diff --git a/Makefile.android b/Makefile.android
index c7d43af..267bffe 100644
--- a/Makefile.android
+++ b/Makefile.android
@@ -72,7 +72,9 @@
 
 ifeq ($(HOST_OS),darwin)
     MY_CFLAGS += -mdynamic-no-pic -D_DARWIN_C_SOURCE=1
-
+    ifneq ($(host_toolchain_header),)
+        MY_CFLAGS += -isystem $(host_toolchain_header)
+    endif
     MY_CFLAGS += -isysroot $(mac_sdk_root) -mmacosx-version-min=$(mac_sdk_version) -DMACOSX_DEPLOYMENT_TARGET=$(mac_sdk_version)
     MY_LDLIBS += -isysroot $(mac_sdk_root) -Wl,-syslibroot,$(mac_sdk_root) -mmacosx-version-min=$(mac_sdk_version)