src/third_party/cython/rules.gni

   1 # Copyright 2014 The Chromium Authors. All rights reserved.
   2 # Use of this source code is governed by a BSD-style license that can be
   3 # found in the LICENSE file.
   4
   5 template("python_binary_module") {
   6   # Only available on linux for now.
   7   assert(is_linux)
   8   assert(defined(invoker.sources))
   9   assert(defined(invoker.python_base_module))
  10
  11   cython_root = "//third_party/cython"
  12   cython_script = "$cython_root/src/cython.py"
  13   cython_output = "${target_out_dir}/${target_name}.cc"
  14
  15   generator_target_name = target_name + "_cython_compiler"
  16   shared_library_name = target_name + "_shared_library"
  17   config_name = target_name + "_python_config"
  18
  19   if (is_linux) {
  20     shared_library_prefix = "lib"
  21     shared_library_suffix = ".so"
  22     python_module_suffix = ".so"
  23   }
  24
  25   target_visibility = [
  26     ":$generator_target_name",
  27     ":$shared_library_name",
  28     ":$target_name",
  29   ]
  30
  31   action(generator_target_name) {
  32     visibility = target_visibility
  33     script = cython_script
  34     sources = invoker.sources
  35     outputs = [ cython_output ]
  36     args = [
  37       "--cplus",
  38       "-I", rebase_path("//", root_build_dir),
  39       "-o", rebase_path(cython_output, root_build_dir),
  40     ] + rebase_path(sources, root_build_dir)
  41   }
  42
  43   config(config_name) {
  44     visibility = target_visibility
  45     python_flags = "//third_party/cython/python_flags.py"
  46     include_dirs = exec_script(python_flags,
  47                                [ "--gn", "--includes" ],
  48                                "list lines")
  49     libs = exec_script(python_flags,
  50                        [ "--gn", "--libraries" ],
  51                        "list lines")
  52     lib_dirs = exec_script(python_flags,
  53                            [ "--gn", "--library_dirs" ],
  54                            "list lines")
  55     if (!is_win) {
  56       # Generated code includes static utility functions that often go unused.
  57       cflags = [
  58         "-Wno-unused-function",
  59       ]
  60     }
  61   }
  62
  63   shared_library(shared_library_name) {
  64     visibility = target_visibility
  65     deps = [
  66       ":$generator_target_name",
  67     ]
  68     if (defined(invoker.deps)) {
  69       deps += invoker.deps
  70     }
  71     if (defined(invoker.datadeps)) {
  72       datadeps = invoker.datadeps
  73     }
  74     sources = [ cython_output ]
  75     if (defined(invoker.additional_sources)) {
  76       sources += invoker.additional_sources
  77     }
  78     configs += [ ":$config_name" ]
  79   }
  80
  81   copy(target_name) {
  82     python_base_module = invoker.python_base_module
  83     sources = [
  84       "$root_out_dir/${shared_library_prefix}${shared_library_name}${shared_library_suffix}"
  85     ]
  86     outputs = [
  87       "$root_out_dir/python/$python_base_module/${target_name}${python_module_suffix}"
  88     ]
  89     deps = [
  90       ":$shared_library_name"
  91     ]
  92   }
  93 }