--- a/make/autoconf/flags-cflags.m4	Thu Apr 05 11:18:39 2018 -0700
+++ b/make/autoconf/flags-cflags.m4	Fri Apr 06 03:53:28 2018 +0200
@@ -394,8 +394,6 @@
     CFLAGS_OS_DEF_JVM="-D_WINDOWS -DWIN32 -D_JNI_IMPLEMENTATION_"
   fi
 
-  # Setup target OS define. Use OS target name but in upper case.
-  OPENJDK_TARGET_OS_UPPERCASE=`$ECHO $OPENJDK_TARGET_OS | $TR 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
   CFLAGS_OS_DEF_JDK="$CFLAGS_OS_DEF_JDK -D$OPENJDK_TARGET_OS_UPPERCASE"
 
   #### GLOBAL DEFINES