--- a/make/autoconf/boot-jdk.m4	Tue Nov 21 17:39:04 2017 +0100
+++ b/make/autoconf/boot-jdk.m4	Tue Dec 05 14:10:11 2017 +0100
@@ -353,9 +353,6 @@
 
   AC_MSG_CHECKING([flags for boot jdk java command] )
 
-  # Disable special log output when a debug build is used as Boot JDK...
-  ADD_JVM_ARG_IF_OK([-XX:-PrintVMOptions -XX:-UnlockDiagnosticVMOptions -XX:-LogVMOutput],boot_jdk_jvmargs,[$JAVA])
-
   # Force en-US environment
   ADD_JVM_ARG_IF_OK([-Duser.language=en -Duser.country=US],boot_jdk_jvmargs,[$JAVA])
 

--- a/make/autoconf/generated-configure.sh	Tue Nov 21 17:39:04 2017 +0100
+++ b/make/autoconf/generated-configure.sh	Tue Dec 05 14:10:11 2017 +0100
@@ -5159,7 +5159,7 @@
 #CUSTOM_AUTOCONF_INCLUDE
 
 # Do not change or remove the following line, it is needed for consistency checks:
-DATE_WHEN_GENERATED=1512410983
+DATE_WHEN_GENERATED=1512479382
 
 ###############################################################################
 #
@@ -67379,23 +67379,6 @@
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking flags for boot jdk java command " >&5
 $as_echo_n "checking flags for boot jdk java command ... " >&6; }
 
-  # Disable special log output when a debug build is used as Boot JDK...
-
-  $ECHO "Check if jvm arg is ok: -XX:-PrintVMOptions -XX:-UnlockDiagnosticVMOptions -XX:-LogVMOutput" >&5
-  $ECHO "Command: $JAVA -XX:-PrintVMOptions -XX:-UnlockDiagnosticVMOptions -XX:-LogVMOutput -version" >&5
-  OUTPUT=`$JAVA -XX:-PrintVMOptions -XX:-UnlockDiagnosticVMOptions -XX:-LogVMOutput -version 2>&1`
-  FOUND_WARN=`$ECHO "$OUTPUT" | $GREP -i warn`
-  FOUND_VERSION=`$ECHO $OUTPUT | $GREP " version \""`
-  if test "x$FOUND_VERSION" != x && test "x$FOUND_WARN" = x; then
-    boot_jdk_jvmargs="$boot_jdk_jvmargs -XX:-PrintVMOptions -XX:-UnlockDiagnosticVMOptions -XX:-LogVMOutput"
-    JVM_ARG_OK=true
-  else
-    $ECHO "Arg failed:" >&5
-    $ECHO "$OUTPUT" >&5
-    JVM_ARG_OK=false
-  fi
-
-
   # Force en-US environment
 
   $ECHO "Check if jvm arg is ok: -Duser.language=en -Duser.country=US" >&5