--- old/common/autoconf/spec.gmk.in	2015-11-16 18:23:20.328050151 +0900
+++ new/common/autoconf/spec.gmk.in	2015-11-16 18:23:20.213172278 +0900
@@ -392,6 +392,22 @@
 CFLAGS_DEBUG_SYMBOLS:=@CFLAGS_DEBUG_SYMBOLS@
 CXXFLAGS_DEBUG_SYMBOLS:=@CXXFLAGS_DEBUG_SYMBOLS@
 ZIP_DEBUGINFO_FILES:=@ZIP_DEBUGINFO_FILES@
+DEBUG_SYMBOL:=@DEBUG_SYMBOL@
+
+ifeq ($(DEBUG_SYMBOL), none)
+  ENABLE_DEBUG_SYMBOLS := false
+else ifeq ($(DEBUG_SYMBOL), internal)
+  ENABLE_DEBUG_SYMBOLS := false  # -g option only.
+  DEBUG_BINARIES := true
+  STRIP_POLICY := no_strip
+  STRIP :=
+else ifeq ($(DEBUG_SYMBOL), external)
+  ENABLE_DEBUG_SYMBOLS := true
+  ZIP_DEBUGINFO_FILES := false
+else ifeq ($(DEBUG_SYMBOL), zipped)
+  ENABLE_DEBUG_SYMBOLS := true
+  ZIP_DEBUGINFO_FILES := true
+endif
 
 #
 # Compress (or not) jars