--- /dev/null
+#!/usr/bin/bash
+
+NUMCPUS=`../../../Tools/Scripts/num-cpus`
+
+XSRCROOT="`pwd`/.."
+XSRCROOT=`realpath "$XSRCROOT"`
+# Do a little dance to get the path into 8.3 form to make it safe for gnu make
+# http://bugzilla.opendarwin.org/show_bug.cgi?id=8173
+XSRCROOT=`cygpath -m "$XSRCROOT"`
+XSRCROOT=`cygpath -u "$XSRCROOT"`
+export XSRCROOT
+export SOURCE_ROOT=$XSRCROOT
+XDSTROOT="$1"
+export XDSTROOT
+# Do a little dance to get the path into 8.3 form to make it safe for gnu make
+# http://bugzilla.opendarwin.org/show_bug.cgi?id=8173
+XDSTROOT=`cygpath -m -s "$XDSTROOT"`
+XDSTROOT=`cygpath -u "$XDSTROOT"`
+export XDSTROOT
+
+SDKROOT="$2"
+export SDKROOT
+# Do a little dance to get the path into 8.3 form to make it safe for gnu make
+# http://bugzilla.opendarwin.org/show_bug.cgi?id=8173
+SDKROOT=`cygpath -m -s "$SDKROOT"`
+SDKROOT=`cygpath -u "$SDKROOT"`
+export SDKROOT
+
+export BUILT_PRODUCTS_DIR="$XDSTROOT/obj32/JavaScriptCore"
+
+mkdir -p "${BUILT_PRODUCTS_DIR}/DerivedSources/docs"
+cd "${BUILT_PRODUCTS_DIR}/DerivedSources"
+
+export JavaScriptCore="${XSRCROOT}"
+export DFTABLES_EXTENSION=".exe"
+make -f "$JavaScriptCore/DerivedSources.make" -j ${NUMCPUS} || exit 1