Support command wrapper in make_global_settings

pylib/gyp/generator/make.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.
 
 # Notes:
 #
 # This is all roughly based on the Makefile system used by the Linux
 # kernel, but is a non-recursive make -- we put the entire dependency
 # graph in front of make and let it figure it out.
 #
@@ skipping 1984 matching lines @@
     'CXX.target':  GetEnvironFallback(('CXX_target', 'CXX'), '$(CXX)'),
     'LINK.target': GetEnvironFallback(('LD_target', 'LD'), '$(LINK)'),
     'CC.host':     GetEnvironFallback(('CC_host',), 'gcc'),
     'AR.host':     GetEnvironFallback(('AR_host',), 'ar'),
     'CXX.host':    GetEnvironFallback(('CXX_host',), 'g++'),
     'LINK.host':   GetEnvironFallback(('LD_host',), 'g++'),
   })
 
   build_file, _, _ = gyp.common.ParseQualifiedTarget(target_list[0])
   make_global_settings_array = data[build_file].get('make_global_settings', [])
+  wrappers = {}
+  wrappers['LINK'] = '%s $(builddir)/linker.lock' % flock_command
+  for key, value in make_global_settings_array:
+    if key.endswith('_wrapper'):
+      wrappers[key[:-len('_wrapper')]] = '$(abspath %s)' % value
   make_global_settings = ''
   for key, value in make_global_settings_array:
+    if re.match('.*_wrapper', key):
+      continue
     if value[0] != '$':
       value = '$(abspath %s)' % value
-    if key == 'LINK':
-      make_global_settings += ('%s ?= %s $(builddir)/linker.lock %s\n' %
-                               (key, flock_command, value))
-    elif key in ('CC', 'CC.host', 'CXX', 'CXX.host'):
+    wrapper = wrappers.get(key)
+    if wrapper:
+      value = '%s %s' % (wrapper, value)
+      del wrappers[key]
+    if key in ('CC', 'CC.host', 'CXX', 'CXX.host'):
       make_global_settings += (
           'ifneq (,$(filter $(origin %s), undefined default))\n' % key)
       # Let gyp-time envvars win over global settings.
       if key in os.environ:
         value = os.environ[key]
       make_global_settings += '  %s = %s\n' % (key, value)
       make_global_settings += 'endif\n'
     else:
       make_global_settings += '%s ?= %s\n' % (key, value)
+  # TODO(ukai): define cmd when only wrapper is specified in
+  # make_global_settings.
+
   header_params['make_global_settings'] = make_global_settings
 
   ensure_directory_exists(makefile_path)
   root_makefile = open(makefile_path, 'w')
   root_makefile.write(SHARED_HEADER % header_params)
   # Currently any versions have the same effect, but in future the behavior
   # could be different.
   if android_ndk_version:
     root_makefile.write(
         '# Define LOCAL_PATH for build of Android applications.\n'
@@ skipping 96 matching lines @@
     root_makefile.write("endif\n")
   root_makefile.write('\n')
 
   if (not generator_flags.get('standalone')
       and generator_flags.get('auto_regeneration', True)):
     WriteAutoRegenerationRule(params, root_makefile, makefile_name, build_files)
 
   root_makefile.write(SHARED_FOOTER)
 
   root_makefile.close()