kc3-lang/angle/gyp/touch_stamp.py

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• Hash : 6a1d2f93
  Author :
  Date : 2017-05-02T16:47:38
  

  Fix compilation of the Vulkan loader / layers in standalone
  
  This commit introduces a stamping mechanism to make sure the order of
  build dependencies is correct.
  
  In GYP there are the following build order dependencies (between others):
   - A target link depends on previous target links
   - A target source compile depends on that target actions outputs
   - An action output depends on the action inputs
  
  The problem was that there were actions in vulkan_layer_utils_static
  that generated headers needed by vulkan_loader's sources (between others)
  Making a "dependencies" relationship between the two was not enough to
  ensure the headers were generated before the source were compiled.
  
  Instead we replicated the "stamping" mechanism used in GN using GYP
  actions that depend on the headers and output a dummy stamp file. This
  completes the build order dependencies: the sources depend on the stamp
  which depend on the action's input, i.e. the generated headers.
  
  BUG=angleproject:1668
  
  Change-Id: I2de15ac2ea8f838acdbf43da1f111b28b8cc2184
  Reviewed-on: https://chromium-review.googlesource.com/493892
  Commit-Queue: Corentin Wallez <cwallez@chromium.org>
  Reviewed-by: Frank Henigman <fjhenigman@chromium.org>
  

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• gyp/touch_stamp.py

• #!/usr/bin/python
  #
  # Copyright (c) 2015 The ANGLE Project Authors. All rights reserved.
  # Use of this source code is governed by a BSD-style license that can be
  # found in the LICENSE file.
  
  # touch_stamp.py: similar to the Unix touch command, used to manual make
  #   stamp files when building with GYP
  
  import os
  import sys
  
  stamp_name = sys.argv[1]
  
  with open(stamp_name, 'a'):
      os.utime(stamp_name, None)
  

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