Use xcrun instead of DEVELOPER_BIN_DIR to deal with tools that keep moving around

pylib/gyp/generator/xcode.py

 # Copyright (c) 2012 Google Inc. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import filecmp
 import gyp.common
 import gyp.xcodeproj_file
 import errno
 import os
 import sys
@@ skipping 1014 matching lines @@
         # in parallel.  Don't use ncpus because Xcode will build ncpus targets
         # in parallel and if each target happens to have a rules step, there
         # would be ncpus^2 things going.  With a machine that has 2 quad-core
         # Xeons, a build can quickly run out of processes based on
         # scheduling/other tasks, and randomly failing builds are no good.
         script = \
 """JOB_COUNT="$(/usr/sbin/sysctl -n hw.ncpu)"
 if [ "${JOB_COUNT}" -gt 4 ]; then
   JOB_COUNT=4
 fi
-exec "${DEVELOPER_BIN_DIR}/make" -f "${PROJECT_FILE_PATH}/%s" -j "${JOB_COUNT}"
+exec xcrun make -f "${PROJECT_FILE_PATH}/%s" -j "${JOB_COUNT}"
 exit 1
 """ % makefile_name
         ssbp = gyp.xcodeproj_file.PBXShellScriptBuildPhase({
               'name': 'Rule "' + rule['rule_name'] + '"',
               'shellScript': script,
               'showEnvVarsInLog': 0,
             })
 
         if support_xct:
           support_xct.AppendProperty('buildPhases', ssbp)
@@ skipping 169 matching lines @@
 
   for build_file in build_files:
     xcode_projects[build_file].Finalize1(xcode_targets, serialize_all_tests)
 
   for build_file in build_files:
     xcode_projects[build_file].Finalize2(xcode_targets,
                                          xcode_target_to_target_dict)
 
   for build_file in build_files:
     xcode_projects[build_file].Write()