1 files changed, 2 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index 97a14a81d2..395910f721 100644
--- a/Makefile
+++ b/Makefile
@@ -79,6 +79,8 @@ HOSTCXX = g++
 HOSTCFLAGS := -g
 HOSTCXXFLAGS := -g
 
+PREPROCESS_ONLY := -E -P -x assembler-with-cpp -undef -I .
+
 DOXYGEN := doxygen
 DOXYGEN_OUTPUT_DIR := doxygen