Source Code for Module SCons.Platform.posix

  1  """SCons.Platform.posix 
  2   
  3  Platform-specific initialization for POSIX (Linux, UNIX, etc.) systems. 
  4   
  5  There normally shouldn't be any need to import this module directly.  It 
  6  will usually be imported through the generic SCons.Platform.Platform() 
  7  selection method. 
  8  """ 
  9   
 10  # 
 11  # Copyright (c) 2001 - 2019 The SCons Foundation 
 12  # 
 13  # Permission is hereby granted, free of charge, to any person obtaining 
 14  # a copy of this software and associated documentation files (the 
 15  # "Software"), to deal in the Software without restriction, including 
 16  # without limitation the rights to use, copy, modify, merge, publish, 
 17  # distribute, sublicense, and/or sell copies of the Software, and to 
 18  # permit persons to whom the Software is furnished to do so, subject to 
 19  # the following conditions: 
 20  # 
 21  # The above copyright notice and this permission notice shall be included 
 22  # in all copies or substantial portions of the Software. 
 23  # 
 24  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY 
 25  # KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE 
 26  # WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
 27  # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 
 28  # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 
 29  # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 
 30  # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 
 31  # 
 32   
 33  __revision__ = "src/engine/SCons/Platform/posix.py 3a41ed6b288cee8d085373ad7fa02894e1903864 2019-01-23 17:30:35 bdeegan" 
 34   
 35  import errno 
 36  import os 
 37  import os.path 
 38  import subprocess 
 39  import sys 
 40  import select 
 41   
 42  import SCons.Util 
 43  from SCons.Platform import TempFileMunge 
 44  from SCons.Platform.virtualenv import ImportVirtualenv 
 45  from SCons.Platform.virtualenv import ignore_virtualenv, enable_virtualenv 
 46   
 47  exitvalmap = { 
 48      2 : 127, 
 49      13 : 126, 
 50  } 
 51   
 52 -def escape(arg): 
 53      """escape shell special characters""" 
 54      slash = '\\' 
 55      special = '"$' 
 56   
 57      arg = arg.replace(slash, slash+slash) 
 58      for c in special: 
 59          arg = arg.replace(c, slash+c) 
 60   
 61      # print("ESCAPE RESULT: %s" % arg) 
 62      return '"' + arg + '"' 
 63   
 64   
 65 -def exec_subprocess(l, env): 
 66      proc = subprocess.Popen(l, env = env, close_fds = True) 
 67      return proc.wait() 
 68   
 69 -def subprocess_spawn(sh, escape, cmd, args, env): 
 70      return exec_subprocess([sh, '-c', ' '.join(args)], env) 
 71   
 72 -def exec_popen3(l, env, stdout, stderr): 
 73      proc = subprocess.Popen(l, env = env, close_fds = True, 
 74                              stdout = stdout, 
 75                              stderr = stderr) 
 76      return proc.wait() 
 77   
 78 -def piped_env_spawn(sh, escape, cmd, args, env, stdout, stderr): 
 79      # spawn using Popen3 combined with the env command 
 80      # the command name and the command's stdout is written to stdout 
 81      # the command's stderr is written to stderr 
 82      return exec_popen3([sh, '-c', ' '.join(args)], 
 83                         env, stdout, stderr) 
 84   
 85   
 86 -def generate(env): 
 87      # Bearing in mind we have python 2.4 as a baseline, we can just do this: 
 88      spawn = subprocess_spawn 
 89      pspawn = piped_env_spawn 
 90      # Note that this means that 'escape' is no longer used 
 91   
 92      if 'ENV' not in env: 
 93          env['ENV']        = {} 
 94      env['ENV']['PATH']    = '/usr/local/bin:/opt/bin:/bin:/usr/bin' 
 95      env['OBJPREFIX']      = '' 
 96      env['OBJSUFFIX']      = '.o' 
 97      env['SHOBJPREFIX']    = '$OBJPREFIX' 
 98      env['SHOBJSUFFIX']    = '$OBJSUFFIX' 
 99      env['PROGPREFIX']     = '' 
100      env['PROGSUFFIX']     = '' 
101      env['LIBPREFIX']      = 'lib' 
102      env['LIBSUFFIX']      = '.a' 
103      env['SHLIBPREFIX']    = '$LIBPREFIX' 
104      env['SHLIBSUFFIX']    = '.so' 
105      env['LIBPREFIXES']    = [ '$LIBPREFIX' ] 
106      env['LIBSUFFIXES']    = [ '$LIBSUFFIX', '$SHLIBSUFFIX' ] 
107      env['PSPAWN']         = pspawn 
108      env['SPAWN']          = spawn 
109      env['SHELL']          = 'sh' 
110      env['ESCAPE']         = escape 
111      env['TEMPFILE']       = TempFileMunge 
112      env['TEMPFILEPREFIX'] = '@' 
113      #Based on LINUX: ARG_MAX=ARG_MAX=131072 - 3000 for environment expansion 
114      #Note: specific platforms might rise or lower this value 
115      env['MAXLINELENGTH']  = 128072 
116   
117      # This platform supports RPATH specifications. 
118      env['__RPATH'] = '$_RPATH' 
119   
120      # GDC is GCC family, but DMD and LDC have different options. 
121      # Must be able to have GCC and DMD work in the same build, so: 
122      env['__DRPATH'] = '$_DRPATH' 
123   
124      if enable_virtualenv and not ignore_virtualenv: 
125          ImportVirtualenv(env) 
126   
127  # Local Variables: 
128  # tab-width:4 
129  # indent-tabs-mode:nil 
130  # End: 
131  # vim: set expandtab tabstop=4 shiftwidth=4: 
132