--- a/make/autoconf/basics.m4	Mon Sep 25 10:21:23 2017 +0200
+++ b/make/autoconf/basics.m4	Mon Sep 25 10:32:00 2017 +0200
@@ -783,10 +783,10 @@
     else
       AC_MSG_RESULT([in build directory with custom name])
     fi
-    OUTPUT_ROOT="${OUTPUT_BASE}/${CONF_NAME}"
-    $MKDIR -p "$OUTPUT_ROOT"
-    if test ! -d "$OUTPUT_ROOT"; then
-      AC_MSG_ERROR([Could not create build directory $OUTPUT_ROOT])
+    OUTPUTDIR="${OUTPUT_BASE}/${CONF_NAME}"
+    $MKDIR -p "$OUTPUTDIR"
+    if test ! -d "$OUTPUTDIR"; then
+      AC_MSG_ERROR([Could not create build directory $OUTPUTDIR])
     fi
   else
     # We are running configure from outside of the src dir.
@@ -796,16 +796,16 @@
     if test "x${CONF_NAME}" = x; then
       CONF_NAME=`$ECHO $CURDIR | $SED -e "s!^${TOPDIR}/build/!!"`
     fi
-    OUTPUT_ROOT="$CURDIR"
+    OUTPUTDIR="$CURDIR"
     AC_MSG_RESULT([in current directory])
 
     # WARNING: This might be a bad thing to do. You need to be sure you want to
     # have a configuration in this directory. Do some sanity checks!
 
-    if test ! -e "$OUTPUT_ROOT/spec.gmk"; then
+    if test ! -e "$OUTPUTDIR/spec.gmk"; then
       # If we have a spec.gmk, we have run here before and we are OK. Otherwise, check for
       # other files
-      files_present=`$LS $OUTPUT_ROOT`
+      files_present=`$LS $OUTPUTDIR`
       # Configure has already touched config.log and confdefs.h in the current dir when this check
       # is performed.
       filtered_files=`$ECHO "$files_present" \
@@ -829,29 +829,29 @@
   AC_MSG_CHECKING([what configuration name to use])
   AC_MSG_RESULT([$CONF_NAME])
 
-  BASIC_FIXUP_PATH(OUTPUT_ROOT)
+  BASIC_FIXUP_PATH(OUTPUTDIR)
 
-  CONFIGURESUPPORT_OUTPUTDIR="$OUTPUT_ROOT/configure-support"
+  CONFIGURESUPPORT_OUTPUTDIR="$OUTPUTDIR/configure-support"
   $MKDIR -p "$CONFIGURESUPPORT_OUTPUTDIR"
 
-  SPEC="$OUTPUT_ROOT/spec.gmk"
+  SPEC="$OUTPUTDIR/spec.gmk"
   AC_SUBST(SPEC)
   AC_SUBST(CONF_NAME)
-  AC_SUBST(OUTPUT_ROOT)
+  AC_SUBST(OUTPUTDIR)
   AC_SUBST(CONFIGURESUPPORT_OUTPUTDIR)
 
   # The spec.gmk file contains all variables for the make system.
-  AC_CONFIG_FILES([$OUTPUT_ROOT/spec.gmk:$AUTOCONF_DIR/spec.gmk.in])
+  AC_CONFIG_FILES([$OUTPUTDIR/spec.gmk:$AUTOCONF_DIR/spec.gmk.in])
   # The bootcycle-spec.gmk file contains support for boot cycle builds.
-  AC_CONFIG_FILES([$OUTPUT_ROOT/bootcycle-spec.gmk:$AUTOCONF_DIR/bootcycle-spec.gmk.in])
+  AC_CONFIG_FILES([$OUTPUTDIR/bootcycle-spec.gmk:$AUTOCONF_DIR/bootcycle-spec.gmk.in])
   # The buildjdk-spec.gmk file contains support for building a buildjdk when cross compiling.
-  AC_CONFIG_FILES([$OUTPUT_ROOT/buildjdk-spec.gmk:$AUTOCONF_DIR/buildjdk-spec.gmk.in])
+  AC_CONFIG_FILES([$OUTPUTDIR/buildjdk-spec.gmk:$AUTOCONF_DIR/buildjdk-spec.gmk.in])
   # The compare.sh is used to compare the build output to other builds.
-  AC_CONFIG_FILES([$OUTPUT_ROOT/compare.sh:$AUTOCONF_DIR/compare.sh.in])
+  AC_CONFIG_FILES([$OUTPUTDIR/compare.sh:$AUTOCONF_DIR/compare.sh.in])
   # The generated Makefile knows where the spec.gmk is and where the source is.
-  # You can run make from the OUTPUT_ROOT, or from the top-level Makefile
+  # You can run make from the OUTPUTDIR, or from the top-level Makefile
   # which will look for generated configurations
-  AC_CONFIG_FILES([$OUTPUT_ROOT/Makefile:$AUTOCONF_DIR/Makefile.in])
+  AC_CONFIG_FILES([$OUTPUTDIR/Makefile:$AUTOCONF_DIR/Makefile.in])
 ])
 
 #%%% Simple tools %%%
@@ -1184,7 +1184,7 @@
   BASIC_CHECK_LEFTOVER_OVERRIDDEN
 
   AC_MSG_CHECKING([if build directory is on local disk])
-  BASIC_CHECK_DIR_ON_LOCAL_DISK($OUTPUT_ROOT,
+  BASIC_CHECK_DIR_ON_LOCAL_DISK($OUTPUTDIR,
       [OUTPUT_DIR_IS_LOCAL="yes"],
       [OUTPUT_DIR_IS_LOCAL="no"])
   AC_MSG_RESULT($OUTPUT_DIR_IS_LOCAL)
@@ -1196,7 +1196,7 @@
 
   # Before generating output files, test if they exist. If they do, this is a reconfigure.
   # Since we can't properly handle the dependencies for this, warn the user about the situation
-  if test -e $OUTPUT_ROOT/spec.gmk; then
+  if test -e $OUTPUTDIR/spec.gmk; then
     IS_RECONFIGURE=yes
   else
     IS_RECONFIGURE=no
@@ -1267,18 +1267,18 @@
   fi
 
   # Rotate our log file (configure.log)
-  if test -e "$OUTPUT_ROOT/configure.log.old"; then
-    $RM -f "$OUTPUT_ROOT/configure.log.old"
+  if test -e "$OUTPUTDIR/configure.log.old"; then
+    $RM -f "$OUTPUTDIR/configure.log.old"
   fi
-  if test -e "$OUTPUT_ROOT/configure.log"; then
-    $MV -f "$OUTPUT_ROOT/configure.log" "$OUTPUT_ROOT/configure.log.old" 2> /dev/null
+  if test -e "$OUTPUTDIR/configure.log"; then
+    $MV -f "$OUTPUTDIR/configure.log" "$OUTPUTDIR/configure.log.old" 2> /dev/null
   fi
 
   # Move configure.log from current directory to the build output root
   if test -e ./configure.log; then
-    $MV -f ./configure.log "$OUTPUT_ROOT/configure.log" 2> /dev/null
+    $MV -f ./configure.log "$OUTPUTDIR/configure.log" 2> /dev/null
   fi
 
   # Make the compare script executable
-  $CHMOD +x $OUTPUT_ROOT/compare.sh
+  $CHMOD +x $OUTPUTDIR/compare.sh
 ])