Mercurial > cpython-lru_cache-weakref

annotate Lib/distutils/emxccompiler.py @ 54294:dba767bc3155 legacy-trunk

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remove mention of old ctypes version
author Benjamin Peterson <benjamin@python.org>
date Sat, 23 May 2009 20:59:09 +0000
parents 9314be0bbb64
children 386452b2d9d5 6b18a095c2e7
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1 """distutils.emxccompiler
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2
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3 Provides the EMXCCompiler class, a subclass of UnixCCompiler that
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4 handles the EMX port of the GNU C compiler to OS/2.
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5 """
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6
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7 # issues:
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8 #
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9 # * OS/2 insists that DLLs can have names no longer than 8 characters
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10 # We put export_symbols in a def-file, as though the DLL can have
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11 # an arbitrary length name, but truncate the output filename.
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12 #
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13 # * only use OMF objects and use LINK386 as the linker (-Zomf)
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14 #
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15 # * always build for multithreading (-Zmt) as the accompanying OS/2 port
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16 # of Python is only distributed with threads enabled.
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17 #
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18 # tested configurations:
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19 #
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20 # * EMX gcc 2.81/EMX 0.9d fix03
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21
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22 __revision__ = "$Id$"
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23
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24 import os,sys,copy
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25 from distutils.ccompiler import gen_preprocess_options, gen_lib_options
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26 from distutils.unixccompiler import UnixCCompiler
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27 from distutils.file_util import write_file
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28 from distutils.errors import DistutilsExecError, CompileError, UnknownFileError
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29 from distutils import log
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30
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31 class EMXCCompiler (UnixCCompiler):
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32
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33 compiler_type = 'emx'
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34 obj_extension = ".obj"
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35 static_lib_extension = ".lib"
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36 shared_lib_extension = ".dll"
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37 static_lib_format = "%s%s"
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38 shared_lib_format = "%s%s"
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39 res_extension = ".res" # compiled resource file
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40 exe_extension = ".exe"
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41
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42 def __init__ (self,
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43 verbose=0,
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44 dry_run=0,
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45 force=0):
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46
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47 UnixCCompiler.__init__ (self, verbose, dry_run, force)
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48
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49 (status, details) = check_config_h()
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50 self.debug_print("Python's GCC status: %s (details: %s)" %
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51 (status, details))
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52 if status is not CONFIG_H_OK:
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53 self.warn(
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54 "Python's pyconfig.h doesn't seem to support your compiler. " +
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55 ("Reason: %s." % details) +
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56 "Compiling may fail because of undefined preprocessor macros.")
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57
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58 (self.gcc_version, self.ld_version) = \
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59 get_versions()
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60 self.debug_print(self.compiler_type + ": gcc %s, ld %s\n" %
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61 (self.gcc_version,
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62 self.ld_version) )
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63
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64 # Hard-code GCC because that's what this is all about.
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65 # XXX optimization, warnings etc. should be customizable.
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66 self.set_executables(compiler='gcc -Zomf -Zmt -O3 -fomit-frame-pointer -mprobe -Wall',
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67 compiler_so='gcc -Zomf -Zmt -O3 -fomit-frame-pointer -mprobe -Wall',
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68 linker_exe='gcc -Zomf -Zmt -Zcrtdll',
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69 linker_so='gcc -Zomf -Zmt -Zcrtdll -Zdll')
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70
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71 # want the gcc library statically linked (so that we don't have
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72 # to distribute a version dependent on the compiler we have)
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73 self.dll_libraries=["gcc"]
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74
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75 # __init__ ()
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76
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77 def _compile(self, obj, src, ext, cc_args, extra_postargs, pp_opts):
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78 if ext == '.rc':
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79 # gcc requires '.rc' compiled to binary ('.res') files !!!
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80 try:
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81 self.spawn(["rc", "-r", src])
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82 except DistutilsExecError, msg:
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83 raise CompileError, msg
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84 else: # for other files use the C-compiler
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85 try:
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86 self.spawn(self.compiler_so + cc_args + [src, '-o', obj] +
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87 extra_postargs)
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88 except DistutilsExecError, msg:
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89 raise CompileError, msg
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90
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91 def link (self,
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92 target_desc,
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93 objects,
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94 output_filename,
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95 output_dir=None,
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96 libraries=None,
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97 library_dirs=None,
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98 runtime_library_dirs=None,
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99 export_symbols=None,
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100 debug=0,
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101 extra_preargs=None,
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102 extra_postargs=None,
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103 build_temp=None,
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104 target_lang=None):
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105
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106 # use separate copies, so we can modify the lists
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107 extra_preargs = copy.copy(extra_preargs or [])
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108 libraries = copy.copy(libraries or [])
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109 objects = copy.copy(objects or [])
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110
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111 # Additional libraries
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112 libraries.extend(self.dll_libraries)
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113
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114 # handle export symbols by creating a def-file
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115 # with executables this only works with gcc/ld as linker
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116 if ((export_symbols is not None) and
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117 (target_desc != self.EXECUTABLE)):
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118 # (The linker doesn't do anything if output is up-to-date.
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119 # So it would probably better to check if we really need this,
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120 # but for this we had to insert some unchanged parts of
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121 # UnixCCompiler, and this is not what we want.)
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122
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123 # we want to put some files in the same directory as the
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124 # object files are, build_temp doesn't help much
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125 # where are the object files
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126 temp_dir = os.path.dirname(objects[0])
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127 # name of dll to give the helper files the same base name
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128 (dll_name, dll_extension) = os.path.splitext(
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129 os.path.basename(output_filename))
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130
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131 # generate the filenames for these files
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132 def_file = os.path.join(temp_dir, dll_name + ".def")
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133
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134 # Generate .def file
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135 contents = [
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136 "LIBRARY %s INITINSTANCE TERMINSTANCE" % \
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137 os.path.splitext(os.path.basename(output_filename))[0],
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138 "DATA MULTIPLE NONSHARED",
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139 "EXPORTS"]
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140 for sym in export_symbols:
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141 contents.append(' "%s"' % sym)
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142 self.execute(write_file, (def_file, contents),
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143 "writing %s" % def_file)
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144
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145 # next add options for def-file and to creating import libraries
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146 # for gcc/ld the def-file is specified as any other object files
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147 objects.append(def_file)
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148
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149 #end: if ((export_symbols is not None) and
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150 # (target_desc != self.EXECUTABLE or self.linker_dll == "gcc")):
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151
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152 # who wants symbols and a many times larger output file
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153 # should explicitly switch the debug mode on
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154 # otherwise we let dllwrap/ld strip the output file
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155 # (On my machine: 10KB < stripped_file < ??100KB
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156 # unstripped_file = stripped_file + XXX KB
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157 # ( XXX=254 for a typical python extension))
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158 if not debug:
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159 extra_preargs.append("-s")
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160
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161 UnixCCompiler.link(self,
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162 target_desc,
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163 objects,
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164 output_filename,
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165 output_dir,
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166 libraries,
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167 library_dirs,
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168 runtime_library_dirs,
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169 None, # export_symbols, we do this in our def-file
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170 debug,
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171 extra_preargs,
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172 extra_postargs,
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173 build_temp,
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174 target_lang)
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175
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176 # link ()
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177
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178 # -- Miscellaneous methods -----------------------------------------
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179
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180 # override the object_filenames method from CCompiler to
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181 # support rc and res-files
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182 def object_filenames (self,
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183 source_filenames,
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184 strip_dir=0,
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185 output_dir=''):
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186 if output_dir is None: output_dir = ''
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187 obj_names = []
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188 for src_name in source_filenames:
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189 # use normcase to make sure '.rc' is really '.rc' and not '.RC'
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190 (base, ext) = os.path.splitext (os.path.normcase(src_name))
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191 if ext not in (self.src_extensions + ['.rc']):
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192 raise UnknownFileError, \
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193 "unknown file type '%s' (from '%s')" % \
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194 (ext, src_name)
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195 if strip_dir:
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196 base = os.path.basename (base)
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197 if ext == '.rc':
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198 # these need to be compiled to object files
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199 obj_names.append (os.path.join (output_dir,
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200 base + self.res_extension))
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201 else:
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202 obj_names.append (os.path.join (output_dir,
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203 base + self.obj_extension))
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204 return obj_names
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205
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206 # object_filenames ()
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207
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208 # override the find_library_file method from UnixCCompiler
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209 # to deal with file naming/searching differences
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210 def find_library_file(self, dirs, lib, debug=0):
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211 shortlib = '%s.lib' % lib
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212 longlib = 'lib%s.lib' % lib # this form very rare
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213
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214 # get EMX's default library directory search path
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215 try:
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216 emx_dirs = os.environ['LIBRARY_PATH'].split(';')
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217 except KeyError:
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218 emx_dirs = []
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219
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220 for dir in dirs + emx_dirs:
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221 shortlibp = os.path.join(dir, shortlib)
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222 longlibp = os.path.join(dir, longlib)
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223 if os.path.exists(shortlibp):
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224 return shortlibp
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225 elif os.path.exists(longlibp):
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226 return longlibp
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227
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228 # Oops, didn't find it in *any* of 'dirs'
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229 return None
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230
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231 # class EMXCCompiler
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232
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233
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234 # Because these compilers aren't configured in Python's pyconfig.h file by
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235 # default, we should at least warn the user if he is using a unmodified
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236 # version.
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237
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238 CONFIG_H_OK = "ok"
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239 CONFIG_H_NOTOK = "not ok"
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240 CONFIG_H_UNCERTAIN = "uncertain"
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241
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242 def check_config_h():
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243
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244 """Check if the current Python installation (specifically, pyconfig.h)
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245 appears amenable to building extensions with GCC. Returns a tuple
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246 (status, details), where 'status' is one of the following constants:
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247 CONFIG_H_OK
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248 all is well, go ahead and compile
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249 CONFIG_H_NOTOK
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250 doesn't look good
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251 CONFIG_H_UNCERTAIN
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252 not sure -- unable to read pyconfig.h
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253 'details' is a human-readable string explaining the situation.
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254
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255 Note there are two ways to conclude "OK": either 'sys.version' contains
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256 the string "GCC" (implying that this Python was built with GCC), or the
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257 installed "pyconfig.h" contains the string "__GNUC__".
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258 """
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259
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260 # XXX since this function also checks sys.version, it's not strictly a
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261 # "pyconfig.h" check -- should probably be renamed...
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262
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263 from distutils import sysconfig
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264 import string
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265 # if sys.version contains GCC then python was compiled with
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266 # GCC, and the pyconfig.h file should be OK
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267 if string.find(sys.version,"GCC") >= 0:
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268 return (CONFIG_H_OK, "sys.version mentions 'GCC'")
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269
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270 fn = sysconfig.get_config_h_filename()
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271 try:
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272 # It would probably better to read single lines to search.
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273 # But we do this only once, and it is fast enough
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274 f = open(fn)
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275 s = f.read()
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276 f.close()
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277
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278 except IOError, exc:
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279 # if we can't read this file, we cannot say it is wrong
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280 # the compiler will complain later about this file as missing
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281 return (CONFIG_H_UNCERTAIN,
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282 "couldn't read '%s': %s" % (fn, exc.strerror))
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283
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284 else:
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285 # "pyconfig.h" contains an "#ifdef __GNUC__" or something similar
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286 if string.find(s,"__GNUC__") >= 0:
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287 return (CONFIG_H_OK, "'%s' mentions '__GNUC__'" % fn)
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288 else:
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289 return (CONFIG_H_NOTOK, "'%s' does not mention '__GNUC__'" % fn)
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290
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291
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292 def get_versions():
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293 """ Try to find out the versions of gcc and ld.
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294 If not possible it returns None for it.
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295 """
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296 from distutils.version import StrictVersion
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297 from distutils.spawn import find_executable
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298 import re
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299
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300 gcc_exe = find_executable('gcc')
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301 if gcc_exe:
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302 out = os.popen(gcc_exe + ' -dumpversion','r')
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303 out_string = out.read()
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304 out.close()
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305 result = re.search('(\d+\.\d+\.\d+)',out_string)
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306 if result:
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307 gcc_version = StrictVersion(result.group(1))
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308 else:
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309 gcc_version = None
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310 else:
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311 gcc_version = None
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312 # EMX ld has no way of reporting version number, and we use GCC
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313 # anyway - so we can link OMF DLLs
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314 ld_version = None
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315 return (gcc_version, ld_version)