diff -r 28b50d07f6f8 -r 710a3c8b516e make/linux/makefiles/adjust-mflags.sh
--- a/make/linux/makefiles/adjust-mflags.sh	Mon Sep 08 12:35:01 2014 -0700
+++ b/make/linux/makefiles/adjust-mflags.sh	Tue Aug 08 15:57:29 2017 +0800
@@ -64,7 +64,7 @@
 	echo "$MFLAGS" \
 	| sed '
 		s/^-/ -/
-		s/ -\([^ 	][^ 	]*\)j/ -\1 -j/
+		s/ -\([^ 	I][^ 	I]*\)j/ -\1 -j/
 		s/ -j[0-9][0-9]*/ -j/
 		s/ -j\([^ 	]\)/ -j -\1/
 		s/ -j/ -j'${HOTSPOT_BUILD_JOBS:-${default_build_jobs}}'/