--- a/common/autoconf/jdk-options.m4	Thu Dec 17 20:24:47 2015 -0800
+++ b/common/autoconf/jdk-options.m4	Fri Dec 18 09:37:15 2015 -0800
@@ -253,7 +253,10 @@
 
     ENABLE_DEBUG_SYMBOLS=true
     ZIP_DEBUGINFO_FILES=true
-    DEBUG_BINARIES=true
+    # -g is already added by ENABLE_DEBUG_SYMBOLS and the hotspot makefiles
+    # will basically do slowdebug builds when DEBUG_BINARIES is set for
+    # fastdebug builds
+    DEBUG_BINARIES=false
     STRIP_POLICY=min_strip
   elif test "x$NATIVE_DEBUG_SYMBOLS" = xnone; then
     ENABLE_DEBUG_SYMBOLS=false
@@ -263,6 +266,8 @@
   elif test "x$NATIVE_DEBUG_SYMBOLS" = xinternal; then
     ENABLE_DEBUG_SYMBOLS=false  # -g option only
     ZIP_DEBUGINFO_FILES=false
+    # Fastdebug builds with this setting will essentially be slowdebug
+    # in hotspot.
     DEBUG_BINARIES=true
     STRIP_POLICY=no_strip
     STRIP=""
@@ -278,7 +283,10 @@
 
     ENABLE_DEBUG_SYMBOLS=true
     ZIP_DEBUGINFO_FILES=false
-    DEBUG_BINARIES=true
+    # -g is already added by ENABLE_DEBUG_SYMBOLS and the hotspot makefiles
+    # will basically do slowdebug builds when DEBUG_BINARIES is set for
+    # fastdebug builds
+    DEBUG_BINARIES=false
     STRIP_POLICY=min_strip
   else
     AC_MSG_ERROR([Allowed native debug symbols are: none, internal, external, zipped])