--- a/make/autoconf/spec.gmk.in	Thu Mar 08 08:17:26 2018 -0800
+++ b/make/autoconf/spec.gmk.in	Thu Mar 08 18:46:37 2018 +0100
@@ -532,7 +532,6 @@
 ZIP_EXTERNAL_DEBUG_SYMBOLS := @ZIP_EXTERNAL_DEBUG_SYMBOLS@
 
 CFLAGS_DEBUG_SYMBOLS:=@CFLAGS_DEBUG_SYMBOLS@
-CXXFLAGS_DEBUG_SYMBOLS:=@CXXFLAGS_DEBUG_SYMBOLS@
 
 #
 # Compress (or not) jars