--- /dev/null
+#!/bin/sh
+set -e
+set -x
+
+if [ $# -ne 1 ]; then
+ echo "Usage: $0 BUILT_PRODUCTS_DIR" 1>&2
+ exit 1
+fi
+
+BUILT_PRODUCTS_DIR="$1"
+
+# We may not be building for a platform we can natively
+# run on the build machine. Build a dedicate copy of zic
+# for processing zoneinfo files
+
+ZICHOST_SYMROOT="${BUILT_PRODUCTS_DIR}/zic_host-sym"
+ZICHOST_DSTROOT="${BUILT_PRODUCTS_DIR}/zic_host-dst"
+ZICHOST="${ZICHOST_DSTROOT}/zic_host"
+
+# A full environment causes build settings from a cross
+# build (like PLATFORM_NAME) to leak into a native
+# host tool build
+
+EXTRA_ARGS=""
+if [ -n "${XCODE_DEVELOPER_USR_PATH}" ]; then
+ EXTRA_ARGS="XCODE_DEVELOPER_USR_PATH=${XCODE_DEVELOPER_USR_PATH}"
+fi
+
+env -i \
+ TMPDIR="${TMPDIR}" \
+ PATH="${PATH}" \
+ SCDontUseServer="${SCDontUseServer}" \
+ __CFPREFERENCES_AVOID_DAEMON="${__CFPREFERENCES_AVOID_DAEMON}" \
+ __CF_USER_TEXT_ENCODING="${__CF_USER_TEXT_ENCODING}" \
+ LANG="${LANG}" \
+ HOME="${HOME}" \
+ $EXTRA_ARGS \
+ xcrun -sdk "${SDKROOT}" xcodebuild install \
+ -target zic \
+ -sdk "macosx" \
+ SRCROOT="${SRCROOT}" \
+ OBJROOT="${OBJROOT}" \
+ SYMROOT="${ZICHOST_SYMROOT}" \
+ DSTROOT="${ZICHOST_DSTROOT}" \
+ ARCHS='$(NATIVE_ARCH_ACTUAL)' \
+ PRODUCT_NAME=zic_host \
+ INSTALL_PATH="/"