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annotate lib/python3.8/site-packages/setuptools/command/build_ext.py @ 0:9e54283cc701 draft

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"planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
author guerler
date Mon, 27 Jul 2020 03:47:31 -0400
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1 import os
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2 import sys
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3 import itertools
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4 from distutils.command.build_ext import build_ext as _du_build_ext
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5 from distutils.file_util import copy_file
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6 from distutils.ccompiler import new_compiler
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7 from distutils.sysconfig import customize_compiler, get_config_var
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8 from distutils.errors import DistutilsError
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9 from distutils import log
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10
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11 from setuptools.extension import Library
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12 from setuptools.extern import six
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13
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14 if six.PY2:
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15 import imp
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16
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17 EXTENSION_SUFFIXES = [
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18 s for s, _, tp in imp.get_suffixes() if tp == imp.C_EXTENSION]
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19 else:
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20 from importlib.machinery import EXTENSION_SUFFIXES
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21
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22 try:
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23 # Attempt to use Cython for building extensions, if available
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24 from Cython.Distutils.build_ext import build_ext as _build_ext
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25 # Additionally, assert that the compiler module will load
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26 # also. Ref #1229.
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27 __import__('Cython.Compiler.Main')
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28 except ImportError:
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29 _build_ext = _du_build_ext
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30
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31 # make sure _config_vars is initialized
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32 get_config_var("LDSHARED")
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33 from distutils.sysconfig import _config_vars as _CONFIG_VARS # noqa
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34
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35
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36 def _customize_compiler_for_shlib(compiler):
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37 if sys.platform == "darwin":
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38 # building .dylib requires additional compiler flags on OSX; here we
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39 # temporarily substitute the pyconfig.h variables so that distutils'
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40 # 'customize_compiler' uses them before we build the shared libraries.
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41 tmp = _CONFIG_VARS.copy()
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42 try:
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43 # XXX Help! I don't have any idea whether these are right...
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44 _CONFIG_VARS['LDSHARED'] = (
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45 "gcc -Wl,-x -dynamiclib -undefined dynamic_lookup")
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46 _CONFIG_VARS['CCSHARED'] = " -dynamiclib"
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47 _CONFIG_VARS['SO'] = ".dylib"
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48 customize_compiler(compiler)
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49 finally:
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50 _CONFIG_VARS.clear()
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51 _CONFIG_VARS.update(tmp)
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52 else:
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53 customize_compiler(compiler)
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54
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55
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56 have_rtld = False
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57 use_stubs = False
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58 libtype = 'shared'
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59
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60 if sys.platform == "darwin":
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61 use_stubs = True
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62 elif os.name != 'nt':
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63 try:
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64 import dl
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65 use_stubs = have_rtld = hasattr(dl, 'RTLD_NOW')
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66 except ImportError:
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67 pass
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68
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69
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70 def if_dl(s):
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71 return s if have_rtld else ''
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72
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73
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74 def get_abi3_suffix():
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75 """Return the file extension for an abi3-compliant Extension()"""
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76 for suffix in EXTENSION_SUFFIXES:
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77 if '.abi3' in suffix: # Unix
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78 return suffix
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79 elif suffix == '.pyd': # Windows
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80 return suffix
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81
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82
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83 class build_ext(_build_ext):
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84 def run(self):
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85 """Build extensions in build directory, then copy if --inplace"""
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86 old_inplace, self.inplace = self.inplace, 0
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87 _build_ext.run(self)
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88 self.inplace = old_inplace
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89 if old_inplace:
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90 self.copy_extensions_to_source()
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91
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92 def copy_extensions_to_source(self):
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93 build_py = self.get_finalized_command('build_py')
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94 for ext in self.extensions:
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95 fullname = self.get_ext_fullname(ext.name)
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96 filename = self.get_ext_filename(fullname)
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97 modpath = fullname.split('.')
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98 package = '.'.join(modpath[:-1])
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99 package_dir = build_py.get_package_dir(package)
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100 dest_filename = os.path.join(package_dir,
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101 os.path.basename(filename))
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102 src_filename = os.path.join(self.build_lib, filename)
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103
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104 # Always copy, even if source is older than destination, to ensure
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105 # that the right extensions for the current Python/platform are
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106 # used.
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107 copy_file(
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108 src_filename, dest_filename, verbose=self.verbose,
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109 dry_run=self.dry_run
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110 )
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111 if ext._needs_stub:
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112 self.write_stub(package_dir or os.curdir, ext, True)
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113
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114 def get_ext_filename(self, fullname):
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115 filename = _build_ext.get_ext_filename(self, fullname)
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116 if fullname in self.ext_map:
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117 ext = self.ext_map[fullname]
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118 use_abi3 = (
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119 not six.PY2
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120 and getattr(ext, 'py_limited_api')
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121 and get_abi3_suffix()
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122 )
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123 if use_abi3:
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124 so_ext = get_config_var('EXT_SUFFIX')
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125 filename = filename[:-len(so_ext)]
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126 filename = filename + get_abi3_suffix()
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127 if isinstance(ext, Library):
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128 fn, ext = os.path.splitext(filename)
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129 return self.shlib_compiler.library_filename(fn, libtype)
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130 elif use_stubs and ext._links_to_dynamic:
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131 d, fn = os.path.split(filename)
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132 return os.path.join(d, 'dl-' + fn)
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133 return filename
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134
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135 def initialize_options(self):
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136 _build_ext.initialize_options(self)
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137 self.shlib_compiler = None
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138 self.shlibs = []
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139 self.ext_map = {}
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140
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141 def finalize_options(self):
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142 _build_ext.finalize_options(self)
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143 self.extensions = self.extensions or []
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144 self.check_extensions_list(self.extensions)
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145 self.shlibs = [ext for ext in self.extensions
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146 if isinstance(ext, Library)]
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147 if self.shlibs:
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148 self.setup_shlib_compiler()
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149 for ext in self.extensions:
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150 ext._full_name = self.get_ext_fullname(ext.name)
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151 for ext in self.extensions:
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152 fullname = ext._full_name
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153 self.ext_map[fullname] = ext
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154
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155 # distutils 3.1 will also ask for module names
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156 # XXX what to do with conflicts?
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157 self.ext_map[fullname.split('.')[-1]] = ext
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158
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159 ltd = self.shlibs and self.links_to_dynamic(ext) or False
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160 ns = ltd and use_stubs and not isinstance(ext, Library)
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161 ext._links_to_dynamic = ltd
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162 ext._needs_stub = ns
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163 filename = ext._file_name = self.get_ext_filename(fullname)
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164 libdir = os.path.dirname(os.path.join(self.build_lib, filename))
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165 if ltd and libdir not in ext.library_dirs:
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166 ext.library_dirs.append(libdir)
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167 if ltd and use_stubs and os.curdir not in ext.runtime_library_dirs:
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168 ext.runtime_library_dirs.append(os.curdir)
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169
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170 def setup_shlib_compiler(self):
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171 compiler = self.shlib_compiler = new_compiler(
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172 compiler=self.compiler, dry_run=self.dry_run, force=self.force
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173 )
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174 _customize_compiler_for_shlib(compiler)
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175
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176 if self.include_dirs is not None:
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177 compiler.set_include_dirs(self.include_dirs)
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178 if self.define is not None:
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179 # 'define' option is a list of (name,value) tuples
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180 for (name, value) in self.define:
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181 compiler.define_macro(name, value)
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182 if self.undef is not None:
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183 for macro in self.undef:
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184 compiler.undefine_macro(macro)
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185 if self.libraries is not None:
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186 compiler.set_libraries(self.libraries)
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187 if self.library_dirs is not None:
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188 compiler.set_library_dirs(self.library_dirs)
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189 if self.rpath is not None:
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190 compiler.set_runtime_library_dirs(self.rpath)
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191 if self.link_objects is not None:
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192 compiler.set_link_objects(self.link_objects)
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193
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194 # hack so distutils' build_extension() builds a library instead
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195 compiler.link_shared_object = link_shared_object.__get__(compiler)
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196
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197 def get_export_symbols(self, ext):
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198 if isinstance(ext, Library):
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199 return ext.export_symbols
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200 return _build_ext.get_export_symbols(self, ext)
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201
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202 def build_extension(self, ext):
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203 ext._convert_pyx_sources_to_lang()
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204 _compiler = self.compiler
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205 try:
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206 if isinstance(ext, Library):
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207 self.compiler = self.shlib_compiler
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208 _build_ext.build_extension(self, ext)
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209 if ext._needs_stub:
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210 cmd = self.get_finalized_command('build_py').build_lib
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211 self.write_stub(cmd, ext)
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212 finally:
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213 self.compiler = _compiler
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214
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215 def links_to_dynamic(self, ext):
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216 """Return true if 'ext' links to a dynamic lib in the same package"""
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217 # XXX this should check to ensure the lib is actually being built
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218 # XXX as dynamic, and not just using a locally-found version or a
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219 # XXX static-compiled version
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220 libnames = dict.fromkeys([lib._full_name for lib in self.shlibs])
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221 pkg = '.'.join(ext._full_name.split('.')[:-1] + [''])
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222 return any(pkg + libname in libnames for libname in ext.libraries)
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223
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224 def get_outputs(self):
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225 return _build_ext.get_outputs(self) + self.__get_stubs_outputs()
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226
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227 def __get_stubs_outputs(self):
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228 # assemble the base name for each extension that needs a stub
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229 ns_ext_bases = (
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230 os.path.join(self.build_lib, *ext._full_name.split('.'))
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231 for ext in self.extensions
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232 if ext._needs_stub
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233 )
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234 # pair each base with the extension
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235 pairs = itertools.product(ns_ext_bases, self.__get_output_extensions())
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236 return list(base + fnext for base, fnext in pairs)
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237
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238 def __get_output_extensions(self):
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239 yield '.py'
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240 yield '.pyc'
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241 if self.get_finalized_command('build_py').optimize:
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242 yield '.pyo'
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243
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244 def write_stub(self, output_dir, ext, compile=False):
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245 log.info("writing stub loader for %s to %s", ext._full_name,
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246 output_dir)
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247 stub_file = (os.path.join(output_dir, *ext._full_name.split('.')) +
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248 '.py')
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249 if compile and os.path.exists(stub_file):
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250 raise DistutilsError(stub_file + " already exists! Please delete.")
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251 if not self.dry_run:
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252 f = open(stub_file, 'w')
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253 f.write(
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254 '\n'.join([
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255 "def __bootstrap__():",
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256 " global __bootstrap__, __file__, __loader__",
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257 " import sys, os, pkg_resources, imp" + if_dl(", dl"),
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258 " __file__ = pkg_resources.resource_filename"
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259 "(__name__,%r)"
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260 % os.path.basename(ext._file_name),
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261 " del __bootstrap__",
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262 " if '__loader__' in globals():",
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263 " del __loader__",
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264 if_dl(" old_flags = sys.getdlopenflags()"),
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265 " old_dir = os.getcwd()",
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266 " try:",
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267 " os.chdir(os.path.dirname(__file__))",
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268 if_dl(" sys.setdlopenflags(dl.RTLD_NOW)"),
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269 " imp.load_dynamic(__name__,__file__)",
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270 " finally:",
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271 if_dl(" sys.setdlopenflags(old_flags)"),
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272 " os.chdir(old_dir)",
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273 "__bootstrap__()",
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274 "" # terminal \n
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275 ])
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276 )
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277 f.close()
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278 if compile:
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279 from distutils.util import byte_compile
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280
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281 byte_compile([stub_file], optimize=0,
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282 force=True, dry_run=self.dry_run)
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283 optimize = self.get_finalized_command('install_lib').optimize
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284 if optimize > 0:
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285 byte_compile([stub_file], optimize=optimize,
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286 force=True, dry_run=self.dry_run)
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287 if os.path.exists(stub_file) and not self.dry_run:
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288 os.unlink(stub_file)
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289
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290
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291 if use_stubs or os.name == 'nt':
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292 # Build shared libraries
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293 #
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294 def link_shared_object(
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295 self, objects, output_libname, output_dir=None, libraries=None,
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296 library_dirs=None, runtime_library_dirs=None, export_symbols=None,
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297 debug=0, extra_preargs=None, extra_postargs=None, build_temp=None,
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298 target_lang=None):
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299 self.link(
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300 self.SHARED_LIBRARY, objects, output_libname,
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301 output_dir, libraries, library_dirs, runtime_library_dirs,
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302 export_symbols, debug, extra_preargs, extra_postargs,
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303 build_temp, target_lang
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304 )
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305 else:
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306 # Build static libraries everywhere else
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307 libtype = 'static'
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308
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309 def link_shared_object(
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310 self, objects, output_libname, output_dir=None, libraries=None,
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311 library_dirs=None, runtime_library_dirs=None, export_symbols=None,
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312 debug=0, extra_preargs=None, extra_postargs=None, build_temp=None,
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313 target_lang=None):
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314 # XXX we need to either disallow these attrs on Library instances,
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315 # or warn/abort here if set, or something...
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316 # libraries=None, library_dirs=None, runtime_library_dirs=None,
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317 # export_symbols=None, extra_preargs=None, extra_postargs=None,
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318 # build_temp=None
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319
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320 assert output_dir is None # distutils build_ext doesn't pass this
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321 output_dir, filename = os.path.split(output_libname)
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322 basename, ext = os.path.splitext(filename)
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323 if self.library_filename("x").startswith('lib'):
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324 # strip 'lib' prefix; this is kludgy if some platform uses
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325 # a different prefix
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326 basename = basename[3:]
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327
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328 self.create_static_lib(
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329 objects, basename, output_dir, debug, target_lang
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330 )